Use ubuntu for the CI

Eliminate various string allocations

.github/workflows/ci.yml

@@ -11,22 +11,24 @@ on:
 
 jobs:
   build:
-    runs-on: windows-latest
+    runs-on: ubuntu-latest
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
       with:
         submodules: true
         fetch-depth: 0
 
-    - name: Install .NET 6.0
-      uses: actions/setup-dotnet@v1
+    - name: Install .NET 6.0, and 8.0
+      uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: '6.0.x'
+        dotnet-version: |
+          6.0.x
+          8.0.x
 
     - name: Build, Test, Pack, Publish
       shell: bash
       run: |
-        dotnet tool install -g dotnet-releaser
+        dotnet tool install -g dotnet-releaser --configfile .github/workflows/nuget_org_only.config
         dotnet-releaser run --nuget-token "${{secrets.NUGET_TOKEN}}" --github-token "${{secrets.GITHUB_TOKEN}}" src/dotnet-releaser.toml

.github/workflows/nuget_org_only.config

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+  </packageSources>
+</configuration>

contributing.md

@@ -0,0 +1,36 @@
+# How to Contribute
+
+Thanks for your interest in contributing to `Markdig`! Here are a few general guidelines on contributing and
+reporting bugs that we ask you to review. Following these guidelines helps to communicate that you respect the time of
+the contributors managing and developing this open source project.
+
+## Reporting Issues
+
+Before reporting a new issue, please ensure that the issue was not already reported or fixed by searching through our
+[issues list](https://github.com/xoofx/markdig/issues).
+
+When creating a new issue, please be sure to include a **title and clear description**, as much relevant information as
+possible, and, if possible, a test case.
+
+## Sending Pull Requests
+
+Before sending a new pull request, take a look at existing pull requests and issues to see if the proposed change or fix
+has been discussed in the past, or if the change was already implemented but not yet released.
+
+We expect new pull requests to include tests for any affected behavior, and, as we follow semantic versioning, we may
+reserve breaking changes until the next major version release.
+
+## Other Ways to Contribute
+
+We welcome anyone that wants to contribute to `Markdig` to triage and reply to open issues to help troubleshoot
+and fix existing bugs. Here is what you can do:
+
+- Help ensure that existing issues follows the recommendations from the _[Reporting Issues](#reporting-issues)_ section,
+  providing feedback to the issue's author on what might be missing.
+  instructions and code samples.
+- Review existing pull requests, and testing patches against real existing applications that use `Markdig`.
+- Write a test, or add a missing test case to an existing test.
+
+Thanks again for your interest on contributing to `Markdig`!
+
+:heart:

readme.md

@@ -12,7 +12,7 @@ You can **try Markdig online** and compare it to other implementations on [babel
 
 - **Very fast parser and html renderer** (no-regexp), very lightweight in terms of GC pressure. See benchmarks
 - **Abstract Syntax Tree** with precise source code location for syntax tree, useful when building a Markdown editor.
-  - Checkout [MarkdownEditor for Visual Studio](https://visualstudiogallery.msdn.microsoft.com/eaab33c3-437b-4918-8354-872dfe5d1bfe) powered by Markdig!
+  - Checkout [Markdown Editor v2 for Visual Studio 2022](https://marketplace.visualstudio.com/items?itemName=MadsKristensen.MarkdownEditor2) powered by Markdig!
 - Converter to **HTML**
 - Passing more than **600+ tests** from the latest [CommonMark specs (0.30)](http://spec.commonmark.org/)
 - Includes all the core elements of CommonMark:
@@ -101,6 +101,10 @@ var result = Markdown.ToHtml("This is a text with some *emphasis*", pipeline);
 
 You can have a look at the [MarkdownExtensions](https://github.com/lunet-io/markdig/blob/master/src/Markdig/MarkdownExtensions.cs) that describes all actionable extensions (by modifying the MarkdownPipeline)
 
+## Contributing
+
+Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated. For detailed contributing guidelines, please see [contributing.md](contributing.md).
+
 ## Build
 
 In order to build Markdig, you need to install [.NET 6.0](https://dotnet.microsoft.com/en-us/download)

src/Markdig.Benchmarks/CommonMarkLib.cs

@@ -1,40 +1,38 @@
-// Copyright (c) Alexandre Mutel. All rights reserved.
+// Copyright (c) Alexandre Mutel. All rights reserved.
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using System;
 using System.Runtime.InteropServices;
 using System.Text;
 
-namespace Testamina.Markdig.Benchmarks
-{
-    public static class CommonMarkLib
-    {
-        public static string ToHtml(string text)
-        {
-            unsafe
-            {
-                var textAsArray = Encoding.UTF8.GetBytes(text);
+namespace Testamina.Markdig.Benchmarks;
 
-                fixed (void* ptext = textAsArray)
+public static class CommonMarkLib
+{
+    public static string ToHtml(string text)
+    {
+        unsafe
+        {
+            var textAsArray = Encoding.UTF8.GetBytes(text);
+
+            fixed (void* ptext = textAsArray)
+            {
+                var ptr = (byte*)cmark_markdown_to_html(new IntPtr(ptext), text.Length);
+                int length = 0;
+                while (ptr[length] != 0)
                 {
-                    var ptr = (byte*)cmark_markdown_to_html(new IntPtr(ptext), text.Length);
-                    int length = 0;
-                    while (ptr[length] != 0)
-                    {
-                        length++;
-                    }
-                    var buffer = new byte[length];
-                    Marshal.Copy(new IntPtr(ptr), buffer, 0, length);
-                    var result = Encoding.UTF8.GetString(buffer);
-                    Marshal.FreeHGlobal(new IntPtr(ptr));
-                    return result;
+                    length++;
                 }
+                var buffer = new byte[length];
+                Marshal.Copy(new IntPtr(ptr), buffer, 0, length);
+                var result = Encoding.UTF8.GetString(buffer);
+                Marshal.FreeHGlobal(new IntPtr(ptr));
+                return result;
             }
         }
-
-        // char *cmark_markdown_to_html(const char *text, size_t len, int options);
-        [DllImport("cmark", CallingConvention = CallingConvention.Cdecl)]
-        private static extern IntPtr cmark_markdown_to_html(IntPtr charBuffer, int len, int options = 0);
     }
+
+    // char *cmark_markdown_to_html(const char *text, size_t len, int options);
+    [DllImport("cmark", CallingConvention = CallingConvention.Cdecl)]
+    private static extern IntPtr cmark_markdown_to_html(IntPtr charBuffer, int len, int options = 0);
 }

src/Markdig.Benchmarks/Markdig.Benchmarks.csproj

@@ -1,9 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <IsPackable>false</IsPackable>
+    <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
   <ItemGroup>
     <None Remove="spec.md" />
@@ -18,12 +19,12 @@
     </Content>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.13.1" />
-    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.13.1" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.13.12" />
+    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.13.12" />
     <PackageReference Include="CommonMark.NET" Version="0.15.1" />
     <PackageReference Include="Markdown" Version="2.2.1" />
     <PackageReference Include="MarkdownSharp" Version="2.0.5" />
-    <PackageReference Include="Microsoft.Diagnostics.Runtime" Version="2.0.226801" />
+    <PackageReference Include="Microsoft.Diagnostics.Runtime" Version="3.1.506101" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Markdig\Markdig.csproj" />

src/Markdig.Benchmarks/Program.cs

@@ -2,76 +2,75 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using System.IO;
 using BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Configs;
 using BenchmarkDotNet.Running;
+
 using Markdig;
 
 
-namespace Testamina.Markdig.Benchmarks
+namespace Testamina.Markdig.Benchmarks;
+
+//[BenchmarkTask(platform: BenchmarkPlatform.X64, jitVersion: BenchmarkJitVersion.RyuJit, processCount: 1, warmupIterationCount: 2)]
+public class Program
 {
-    //[BenchmarkTask(platform: BenchmarkPlatform.X64, jitVersion: BenchmarkJitVersion.RyuJit, processCount: 1, warmupIterationCount: 2)]
-    public class Program
+    private string text;
+
+    public Program()
     {
-        private string text;
+        //text = File.ReadAllText("progit.md");
+        text = File.ReadAllText("spec.md");
+    }
 
-        public Program()
-        {
-            //text = File.ReadAllText("progit.md");
-            text = File.ReadAllText("spec.md");
-        }
+    //[Benchmark(Description = "TestMarkdig", OperationsPerInvoke = 4096)]
+    [Benchmark(Description = "markdig")]
+    public void TestMarkdig()
+    {
+        //var reader = new StreamReader(File.Open("spec.md", FileMode.Open));
+        Markdown.ToHtml(text);
+        //File.WriteAllText("spec.html", writer.ToString());
+    }
 
-        //[Benchmark(Description = "TestMarkdig", OperationsPerInvoke = 4096)]
-        [Benchmark(Description = "markdig")]
-        public void TestMarkdig()
-        {
-            //var reader = new StreamReader(File.Open("spec.md", FileMode.Open));
-            Markdown.ToHtml(text);
-            //File.WriteAllText("spec.html", writer.ToString());
-        }
+    [Benchmark(Description = "cmark")]
+    public void TestCommonMarkCpp()
+    {
+        //var reader = new StreamReader(File.Open("spec.md", FileMode.Open));
+        CommonMarkLib.ToHtml(text);
+        //File.WriteAllText("spec.html", writer.ToString());
+    }
 
-        [Benchmark(Description = "cmark")]
-        public void TestCommonMarkCpp()
-        {
-            //var reader = new StreamReader(File.Open("spec.md", FileMode.Open));
-            CommonMarkLib.ToHtml(text);
-            //File.WriteAllText("spec.html", writer.ToString());
-        }
+    [Benchmark(Description = "CommonMark.NET")]
+    public void TestCommonMarkNet()
+    {
+        ////var reader = new StreamReader(File.Open("spec.md", FileMode.Open));
+        // var reader = new StringReader(text);
+        //CommonMark.CommonMarkConverter.Parse(reader);
+        //CommonMark.CommonMarkConverter.Parse(reader);
+        //reader.Dispose();
+        //var writer = new StringWriter();
+        CommonMark.CommonMarkConverter.Convert(text);
+        //writer.Flush();
+        //writer.ToString();
+    }
 
-        [Benchmark(Description = "CommonMark.NET")]
-        public void TestCommonMarkNet()
-        {
-            ////var reader = new StreamReader(File.Open("spec.md", FileMode.Open));
-            // var reader = new StringReader(text);
-            //CommonMark.CommonMarkConverter.Parse(reader);
-            //CommonMark.CommonMarkConverter.Parse(reader);
-            //reader.Dispose();
-            //var writer = new StringWriter();
-            CommonMark.CommonMarkConverter.Convert(text);
-            //writer.Flush();
-            //writer.ToString();
-        }
+    [Benchmark(Description = "MarkdownSharp")]
+    public void TestMarkdownSharp()
+    {
+        new MarkdownSharp.Markdown().Transform(text);
+    }
 
-        [Benchmark(Description = "MarkdownSharp")]
-        public void TestMarkdownSharp()
-        {
-            new MarkdownSharp.Markdown().Transform(text);
-        }
+    static void Main(string[] args)
+    {
+        var config = ManualConfig.Create(DefaultConfig.Instance);
+        //var gcDiagnoser = new MemoryDiagnoser();
+        //config.Add(new Job { Mode = Mode.SingleRun, LaunchCount = 2, WarmupCount = 2, IterationTime = 1024, TargetCount = 10 });
+        //config.Add(new Job { Mode = Mode.Throughput, LaunchCount = 2, WarmupCount = 2, TargetCount = 10 });
+        //config.Add(gcDiagnoser);
 
-        static void Main(string[] args)
-        {
-            var config = ManualConfig.Create(DefaultConfig.Instance);
-            //var gcDiagnoser = new MemoryDiagnoser();
-            //config.Add(new Job { Mode = Mode.SingleRun, LaunchCount = 2, WarmupCount = 2, IterationTime = 1024, TargetCount = 10 });
-            //config.Add(new Job { Mode = Mode.Throughput, LaunchCount = 2, WarmupCount = 2, TargetCount = 10 });
-            //config.Add(gcDiagnoser);
-
-            //var  config = DefaultConfig.Instance;
-            BenchmarkRunner.Run<Program>(config);
-            //BenchmarkRunner.Run<TestDictionary>(config);
-            //BenchmarkRunner.Run<TestMatchPerf>();
-            //BenchmarkRunner.Run<TestStringPerf>();
-        }
+        //var  config = DefaultConfig.Instance;
+        BenchmarkRunner.Run<Program>(config);
+        //BenchmarkRunner.Run<TestDictionary>(config);
+        //BenchmarkRunner.Run<TestMatchPerf>();
+        //BenchmarkRunner.Run<TestStringPerf>();
     }
 }

src/Markdig.Benchmarks/TestMatchPerf.cs

@@ -2,81 +2,79 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using System.Collections.Generic;
 using System.Text;
 using System.Text.RegularExpressions;
 
-namespace Testamina.Markdig.Benchmarks
+namespace Testamina.Markdig.Benchmarks;
+
+public class TextRegexHelper
 {
-    public class TextRegexHelper
+    private readonly Dictionary<string, string> replacers;
+    private readonly Regex regex;
+
+    public TextRegexHelper(Dictionary<string, string> replacers)
     {
-        private readonly Dictionary<string, string> replacers;
-        private readonly Regex regex;
+        this.replacers = replacers;
+        var builder = new StringBuilder();
 
-        public TextRegexHelper(Dictionary<string, string> replacers)
+        // (?<1>:value:?)|(?<1>:noo:?)
+        foreach (var replace in replacers)
         {
-            this.replacers = replacers;
-            var builder = new StringBuilder();
-
-            // (?<1>:value:?)|(?<1>:noo:?)
-            foreach (var replace in replacers)
+            var matchStr = Regex.Escape(replace.Key);
+            if (builder.Length > 0)
             {
-                var matchStr = Regex.Escape(replace.Key);
-                if (builder.Length > 0)
-                {
-                    builder.Append('|');
-                }
-                builder.Append("(?<1>").Append(matchStr).Append("?)");
+                builder.Append('|');
             }
-
-            regex = new Regex(builder.ToString());
+            builder.Append("(?<1>").Append(matchStr).Append("?)");
         }
 
-        public bool TryMatch(string text, int offset, out string matchText, out string replaceText)
-        {
-            replaceText = null;
-            matchText = null;
-            var result = regex.Match(text, offset);
-            if (!result.Success)
-            {
-                return false;
-            }
-
-            matchText = result.Groups[1].Value;
-            replaceText = replacers[matchText];
-            return true;
-        }
+        regex = new Regex(builder.ToString());
     }
 
-    /*
-    public class TestMatchPerf
+    public bool TryMatch(string text, int offset, out string matchText, out string replaceText)
     {
-        private readonly TextMatchHelper matcher;
-
-        public TestMatchPerf()
+        replaceText = null;
+        matchText = null;
+        var result = regex.Match(text, offset);
+        if (!result.Success)
         {
-            var replacers = new Dictionary<string, string>();
-            for (int i = 0; i < 1000; i++)
-            {
-                replacers.Add($":z{i}:", i.ToString());
-            }
-            replacers.Add(":abc:", "yes");
-
-            matcher = new TextMatchHelper(new HashSet<string>(replacers.Keys));
+            return false;
         }
 
-        [Benchmark]
-        public void TestMatch()
-        {
+        matchText = result.Groups[1].Value;
+        replaceText = replacers[matchText];
+        return true;
+    }
+}
 
-            for (int i = 0; i < 1000; i++)
-            {
-                string matchText;
-                //var text = ":z150: this is a long string";
-                var text = ":z1:";
-                matcher.TryMatch(text, 0, text.Length, out matchText);
-            }
+/*
+public class TestMatchPerf
+{
+    private readonly TextMatchHelper matcher;
+
+    public TestMatchPerf()
+    {
+        var replacers = new Dictionary<string, string>();
+        for (int i = 0; i < 1000; i++)
+        {
+            replacers.Add($":z{i}:", i.ToString());
+        }
+        replacers.Add(":abc:", "yes");
+
+        matcher = new TextMatchHelper(new HashSet<string>(replacers.Keys));
+    }
+
+    [Benchmark]
+    public void TestMatch()
+    {
+
+        for (int i = 0; i < 1000; i++)
+        {
+            string matchText;
+            //var text = ":z150: this is a long string";
+            var text = ":z1:";
+            matcher.TryMatch(text, 0, text.Length, out matchText);
         }
     }
-    */
-}
+}
+*/

src/Markdig.Benchmarks/TestStringPerf.cs

@@ -1,58 +1,57 @@
-using System.IO;
 using BenchmarkDotNet.Attributes;
+
 using Markdig.Renderers;
 
-namespace Testamina.Markdig.Benchmarks
+namespace Testamina.Markdig.Benchmarks;
+
+public class TestStringPerf
 {
-    public class TestStringPerf
+    private string text;
+
+    public TestStringPerf()
     {
-        private string text;
-
-        public TestStringPerf()
-        {
-            text = new string('a', 1000);
-        }
-
-        [Benchmark]
-        public void TestIndexOfAny()
-        {
-            var writer = new HtmlRenderer(new StringWriter());
-            for (int i = 0; i < 100; i++)
-            {
-                writer.WriteEscape(text, 0, text.Length);
-                writer.WriteEscape(text, 0, text.Length);
-                writer.WriteEscape(text, 0, text.Length);
-                writer.WriteEscape(text, 0, text.Length);
-                writer.WriteEscape(text, 0, text.Length);
-
-                writer.WriteEscape(text, 0, text.Length);
-                writer.WriteEscape(text, 0, text.Length);
-                writer.WriteEscape(text, 0, text.Length);
-                writer.WriteEscape(text, 0, text.Length);
-                writer.WriteEscape(text, 0, text.Length);
-            }
-        }
-
-
-        //[Benchmark]
-        //public void TestCustomIndexOfAny()
-        //{
-        //    var writer = new HtmlRenderer(new StringWriter());
-        //    for (int i = 0; i < 100; i++)
-        //    {
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //        writer.WriteEscapeOptimized(text, 0, text.Length);
-        //    }
-        //}
-
+        text = new string('a', 1000);
     }
+
+    [Benchmark]
+    public void TestIndexOfAny()
+    {
+        var writer = new HtmlRenderer(new StringWriter());
+        for (int i = 0; i < 100; i++)
+        {
+            writer.WriteEscape(text, 0, text.Length);
+            writer.WriteEscape(text, 0, text.Length);
+            writer.WriteEscape(text, 0, text.Length);
+            writer.WriteEscape(text, 0, text.Length);
+            writer.WriteEscape(text, 0, text.Length);
+
+            writer.WriteEscape(text, 0, text.Length);
+            writer.WriteEscape(text, 0, text.Length);
+            writer.WriteEscape(text, 0, text.Length);
+            writer.WriteEscape(text, 0, text.Length);
+            writer.WriteEscape(text, 0, text.Length);
+        }
+    }
+
+
+    //[Benchmark]
+    //public void TestCustomIndexOfAny()
+    //{
+    //    var writer = new HtmlRenderer(new StringWriter());
+    //    for (int i = 0; i < 100; i++)
+    //    {
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //        writer.WriteEscapeOptimized(text, 0, text.Length);
+    //    }
+    //}
+
 }

src/Markdig.Tests/GlobalUsings.cs

@@ -0,0 +1,5 @@
+// Copyright (c) Alexandre Mutel. All rights reserved.
+// This file is licensed under the BSD-Clause 2 license.
+// See the license.txt file in the project root for more information.
+
+global using Assert = NUnit.Framework.Legacy.ClassicAssert;

src/Markdig.Tests/Markdig.Tests.csproj

@@ -1,18 +1,19 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <IsPackable>false</IsPackable>
+    <ImplicitUsings>enable</ImplicitUsings>
     <StartupObject>Markdig.Tests.Program</StartupObject>
-    <SpecExecutable>$(MSBuildProjectDirectory)\..\SpecFileGen\bin\$(Configuration)\net6.0\SpecFileGen.dll</SpecExecutable>
-    <SpecTimestamp>$(MSBuildProjectDirectory)\..\SpecFileGen\bin\$(Configuration)\net6.0\SpecFileGen.timestamp</SpecTimestamp>
+    <SpecExecutable>$(MSBuildProjectDirectory)\..\SpecFileGen\bin\$(Configuration)\net8.0\SpecFileGen.dll</SpecExecutable>
+    <SpecTimestamp>$(MSBuildProjectDirectory)\..\SpecFileGen\bin\$(Configuration)\net8.0\SpecFileGen.timestamp</SpecTimestamp>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+    <PackageReference Include="NUnit" Version="4.0.1" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>
 
   <ItemGroup>
@@ -20,6 +21,10 @@
     <ProjectReference Include="..\SpecFileGen\SpecFileGen.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Using Include="NUnit.Framework" />
+  </ItemGroup>
+
   <ItemGroup>
     <ItemSpecExecutable Include="$(SpecExecutable)" />
     <InputSpecFiles Include="Specs\*.md" />

src/Markdig.Tests/MiscTests.cs

@@ -1,192 +1,192 @@
-using System;
-using System.IO;
-using System.Linq;
 using System.Text.RegularExpressions;
+
 using Markdig.Extensions.AutoLinks;
+using Markdig.Extensions.Tables;
+using Markdig.Syntax;
 using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class MiscTests
 {
-    public class MiscTests
+    [Test]
+    public void LinkWithInvalidNonAsciiDomainNameIsIgnored()
     {
-        [Test]
-        public void LinkWithInvalidNonAsciiDomainNameIsIgnored()
+        // Url from https://github.com/lunet-io/markdig/issues/438
+        _ = Markdown.ToHtml("[minulém díle](http://V%20minulém%20díle%20jsme%20nainstalovali%20SQL%20Server,%20který%20je%20nutný%20pro%20běh%20Configuration%20Manageru.%20Dnes%20nás%20čeká%20instalace%20WSUS,%20což%20je%20produkt,%20jež%20je%20možné%20používat%20i%20jako%20samostatnou%20funkci%20ve%20Windows%20Serveru,%20který%20se%20stará%20o%20stažení%20a%20instalaci%20aktualizací%20z%20Microsoft%20Update%20na%20klientské%20počítače.%20Stejně%20jako%20v%20předchozích%20dílech,%20tak%20i%20v%20tomto%20si%20ukážeme%20obě%20varianty%20instalace%20–%20a%20to%20jak%20instalaci%20z%20PowerShellu,%20tak%20instalaci%20pomocí%20GUI.) ");
+
+        // Valid IDN
+        TestParser.TestSpec("[foo](http://ünicode.com)", "<p><a href=\"http://xn--nicode-2ya.com\">foo</a></p>");
+        TestParser.TestSpec("[foo](http://ünicode.ünicode.com)", "<p><a href=\"http://xn--nicode-2ya.xn--nicode-2ya.com\">foo</a></p>");
+
+        // Invalid IDN
+        TestParser.TestSpec("[foo](http://ünicode..com)", "<p><a href=\"http://%C3%BCnicode..com\">foo</a></p>");
+    }
+
+    [TestCase("link [foo [bar]]")] // https://spec.commonmark.org/0.29/#example-508
+    [TestCase("link [foo][bar]")]
+    [TestCase("link [][foo][bar][]")]
+    [TestCase("link [][foo][bar][[]]")]
+    [TestCase("link [foo] [bar]")]
+    [TestCase("link [[foo] [] [bar] [[abc]def]]")]
+    [TestCase("[]")]
+    [TestCase("[ ]")]
+    [TestCase("[bar][]")]
+    [TestCase("[bar][ foo]")]
+    [TestCase("[bar][foo ][]")]
+    [TestCase("[bar][fo[ ]o ][][]")]
+    [TestCase("[a]b[c[d[e]f]g]h")]
+    [TestCase("a[b[c[d]e]f[g]h]i foo [j]k[l[m]n]o")]
+    [TestCase("a[b[c[d]e]f[g]h]i[] [][foo][bar][] foo [j]k[l[m]n]o")]
+    [TestCase("a[b[c[d]e]f[g]h]i foo [j]k[l[m]n]o[][]")]
+    public void LinkTextMayContainBalancedBrackets(string linkText)
+    {
+        string markdown = $"[{linkText}](/uri)";
+        string expected = $@"<p><a href=""/uri"">{linkText}</a></p>";
+
+        TestParser.TestSpec(markdown, expected);
+
+        // Make the link text unbalanced
+        foreach (var bracketIndex in linkText
+            .Select((c, i) => new Tuple<char, int>(c, i))
+            .Where(t => t.Item1 == '[' || t.Item1 == ']')
+            .Select(t => t.Item2))
         {
-            // Url from https://github.com/lunet-io/markdig/issues/438
-            _ = Markdown.ToHtml("[minulém díle](http://V%20minulém%20díle%20jsme%20nainstalovali%20SQL%20Server,%20který%20je%20nutný%20pro%20běh%20Configuration%20Manageru.%20Dnes%20nás%20čeká%20instalace%20WSUS,%20což%20je%20produkt,%20jež%20je%20možné%20používat%20i%20jako%20samostatnou%20funkci%20ve%20Windows%20Serveru,%20který%20se%20stará%20o%20stažení%20a%20instalaci%20aktualizací%20z%20Microsoft%20Update%20na%20klientské%20počítače.%20Stejně%20jako%20v%20předchozích%20dílech,%20tak%20i%20v%20tomto%20si%20ukážeme%20obě%20varianty%20instalace%20–%20a%20to%20jak%20instalaci%20z%20PowerShellu,%20tak%20instalaci%20pomocí%20GUI.) ");
+            string brokenLinkText = linkText.Remove(bracketIndex, 1);
 
-            // Valid IDN
-            TestParser.TestSpec("[foo](http://ünicode.com)", "<p><a href=\"http://xn--nicode-2ya.com\">foo</a></p>");
-            TestParser.TestSpec("[foo](http://ünicode.ünicode.com)", "<p><a href=\"http://xn--nicode-2ya.xn--nicode-2ya.com\">foo</a></p>");
+            markdown = $"[{brokenLinkText}](/uri)";
+            expected = $@"<p><a href=""/uri"">{brokenLinkText}</a></p>";
 
-            // Invalid IDN
-            TestParser.TestSpec("[foo](http://ünicode..com)", "<p><a href=\"http://%C3%BCnicode..com\">foo</a></p>");
+            string actual = Markdown.ToHtml(markdown);
+            Assert.AreNotEqual(expected, actual);
         }
+    }
 
-        [TestCase("link [foo [bar]]")] // https://spec.commonmark.org/0.29/#example-508
-        [TestCase("link [foo][bar]")]
-        [TestCase("link [][foo][bar][]")]
-        [TestCase("link [][foo][bar][[]]")]
-        [TestCase("link [foo] [bar]")]
-        [TestCase("link [[foo] [] [bar] [[abc]def]]")]
-        [TestCase("[]")]
-        [TestCase("[ ]")]
-        [TestCase("[bar][]")]
-        [TestCase("[bar][ foo]")]
-        [TestCase("[bar][foo ][]")]
-        [TestCase("[bar][fo[ ]o ][][]")]
-        [TestCase("[a]b[c[d[e]f]g]h")]
-        [TestCase("a[b[c[d]e]f[g]h]i foo [j]k[l[m]n]o")]
-        [TestCase("a[b[c[d]e]f[g]h]i[] [][foo][bar][] foo [j]k[l[m]n]o")]
-        [TestCase("a[b[c[d]e]f[g]h]i foo [j]k[l[m]n]o[][]")]
-        public void LinkTextMayContainBalancedBrackets(string linkText)
+    [Theory]
+    [TestCase('[', 9 * 1024, true, false)]
+    [TestCase('[', 11 * 1024, true, true)]
+    [TestCase('[', 100, false, false)]
+    [TestCase('[', 150, false, true)]
+    [TestCase('>', 100, true, false)]
+    [TestCase('>', 150, true, true)]
+    public void GuardsAgainstHighlyNestedNodes(char c, int count, bool parseOnly, bool shouldThrow)
+    {
+        var markdown = new string(c, count);
+        TestDelegate test = parseOnly ? () => Markdown.Parse(markdown) : () => Markdown.ToHtml(markdown);
+
+        if (shouldThrow)
         {
-            string markdown = $"[{linkText}](/uri)";
-            string expected = $@"<p><a href=""/uri"">{linkText}</a></p>";
-
-            TestParser.TestSpec(markdown, expected);
-
-            // Make the link text unbalanced
-            foreach (var bracketIndex in linkText
-                .Select((c, i) => new Tuple<char, int>(c, i))
-                .Where(t => t.Item1 == '[' || t.Item1 == ']')
-                .Select(t => t.Item2))
-            {
-                string brokenLinkText = linkText.Remove(bracketIndex, 1);
-
-                markdown = $"[{brokenLinkText}](/uri)";
-                expected = $@"<p><a href=""/uri"">{brokenLinkText}</a></p>";
-
-                string actual = Markdown.ToHtml(markdown);
-                Assert.AreNotEqual(expected, actual);
-            }
+            Exception e = Assert.Throws<ArgumentException>(test);
+            Assert.True(e.Message.Contains("depth limit"));
         }
-
-        [Theory]
-        [TestCase('[', 9 * 1024, true, false)]
-        [TestCase('[', 11 * 1024, true, true)]
-        [TestCase('[', 100, false, false)]
-        [TestCase('[', 150, false, true)]
-        [TestCase('>', 100, true, false)]
-        [TestCase('>', 150, true, true)]
-        public void GuardsAgainstHighlyNestedNodes(char c, int count, bool parseOnly, bool shouldThrow)
+        else
         {
-            var markdown = new string(c, count);
-            TestDelegate test = parseOnly ? () => Markdown.Parse(markdown) : () => Markdown.ToHtml(markdown);
-
-            if (shouldThrow)
-            {
-                Exception e = Assert.Throws<ArgumentException>(test);
-                Assert.True(e.Message.Contains("depth limit"));
-            }
-            else
-            {
-                test();
-            }
+            test();
         }
+    }
 
-        [Test]
-        public void IsIssue356Corrected()
+    [Test]
+    public void IsIssue356Corrected()
+    {
+        string input = @"https://foo.bar/path/\#m4mv5W0GYKZpGvfA.97";
+        string expected = @"<p><a href=""https://foo.bar/path/%5C#m4mv5W0GYKZpGvfA.97"">https://foo.bar/path/\#m4mv5W0GYKZpGvfA.97</a></p>";
+
+        TestParser.TestSpec($"<{input}>", expected);
+        TestParser.TestSpec(input, expected, "autolinks|advanced");
+    }
+
+    [Test]
+    public void IsIssue365Corrected()
+    {
+        // The scheme must be escaped too...
+        string input = "![image](\"onclick=\"alert&amp;#40;'click'&amp;#41;\"://)";
+        string expected = "<p><img src=\"%22onclick=%22alert&amp;#40;%27click%27&amp;#41;%22://\" alt=\"image\" /></p>";
+
+        TestParser.TestSpec(input, expected);
+    }
+
+    [Test]
+    public void TestAltTextIsCorrectlyEscaped()
+    {
+        TestParser.TestSpec(
+            @"![This is image alt text with quotation ' and double quotation ""hello"" world](girl.png)",
+            @"<p><img src=""girl.png"" alt=""This is image alt text with quotation ' and double quotation &quot;hello&quot; world"" /></p>");
+    }
+
+    [Test]
+    public void TestChangelogPRLinksMatchDescription()
+    {
+        string solutionFolder = Path.GetFullPath(Path.Combine(TestParser.TestsDirectory, "../.."));
+        string changelogPath = Path.Combine(solutionFolder, "changelog.md");
+        string changelog = File.ReadAllText(changelogPath);
+        var matches = Regex.Matches(changelog, @"\(\[\(PR #(\d+)\)\]\(.*?pull\/(\d+)\)\)");
+        Assert.Greater(matches.Count, 0);
+        foreach (Match match in matches)
         {
-            string input = @"https://foo.bar/path/\#m4mv5W0GYKZpGvfA.97";
-            string expected = @"<p><a href=""https://foo.bar/path/%5C#m4mv5W0GYKZpGvfA.97"">https://foo.bar/path/\#m4mv5W0GYKZpGvfA.97</a></p>";
-
-            TestParser.TestSpec($"<{input}>", expected);
-            TestParser.TestSpec(input, expected, "autolinks|advanced");
+            Assert.True(int.TryParse(match.Groups[1].Value, out int textNr));
+            Assert.True(int.TryParse(match.Groups[2].Value, out int linkNr));
+            Assert.AreEqual(textNr, linkNr);
         }
+    }
 
-        [Test]
-        public void IsIssue365Corrected()
-        {
-            // The scheme must be escaped too...
-            string input = "![image](\"onclick=\"alert&amp;#40;'click'&amp;#41;\"://)";
-            string expected = "<p><img src=\"%22onclick=%22alert&amp;#40;%27click%27&amp;#41;%22://\" alt=\"image\" /></p>";
+    [Test]
+    public void TestFixHang()
+    {
+        var input = File.ReadAllText(Path.Combine(TestParser.TestsDirectory, "hang.md"));
+        _ = Markdown.ToHtml(input);
+    }
 
-            TestParser.TestSpec(input, expected);
-        }
+    [Test]
+    public void TestInvalidHtmlEntity()
+    {
+        var input = "9&ddr;&*&ddr;&de<64><65>__";
+        TestParser.TestSpec(input, "<p>9&amp;ddr;&amp;*&amp;ddr;&amp;de<64><65>__</p>");
+    }
 
-        [Test]
-        public void TestAltTextIsCorrectlyEscaped()
-        {
-            TestParser.TestSpec(
-                @"![This is image alt text with quotation ' and double quotation ""hello"" world](girl.png)",
-                @"<p><img src=""girl.png"" alt=""This is image alt text with quotation ' and double quotation &quot;hello&quot; world"" /></p>");
-        }
+    [Test]
+    public void TestInvalidCharacterHandling()
+    {
+        var input = File.ReadAllText(Path.Combine(TestParser.TestsDirectory, "ArgumentOutOfRangeException.md"));
+        _ = Markdown.ToHtml(input);
+    }
 
-        [Test]
-        public void TestChangelogPRLinksMatchDescription()
-        {
-            string solutionFolder = Path.GetFullPath(Path.Combine(TestParser.TestsDirectory, "../.."));
-            string changelogPath = Path.Combine(solutionFolder, "changelog.md");
-            string changelog = File.ReadAllText(changelogPath);
-            var matches = Regex.Matches(changelog, @"\(\[\(PR #(\d+)\)\]\(.*?pull\/(\d+)\)\)");
-            Assert.Greater(matches.Count, 0);
-            foreach (Match match in matches)
-            {
-                Assert.True(int.TryParse(match.Groups[1].Value, out int textNr));
-                Assert.True(int.TryParse(match.Groups[2].Value, out int linkNr));
-                Assert.AreEqual(textNr, linkNr);
-            }
-        }
+    [Test]
+    public void TestInvalidCodeEscape()
+    {
+        var input = "```**Header**	";
+        _ = Markdown.ToHtml(input);
+    }
 
-        [Test]
-        public void TestFixHang()
-        {
-            var input = File.ReadAllText(Path.Combine(TestParser.TestsDirectory, "hang.md"));
-            _ = Markdown.ToHtml(input);
-        }
+    [Test]
+    public void TestEmphasisAndHtmlEntity()
+    {
+        var markdownText = "*Unlimited-Fun&#174;*&#174;";
+        TestParser.TestSpec(markdownText, "<p><em>Unlimited-Fun®</em>®</p>");
+    }
 
-        [Test]
-        public void TestInvalidHtmlEntity()
-        {
-            var input = "9&ddr;&*&ddr;&de<64><65>__";
-            TestParser.TestSpec(input, "<p>9&amp;ddr;&amp;*&amp;ddr;&amp;de<64><65>__</p>");
-        }
-
-        [Test]
-        public void TestInvalidCharacterHandling()
-        {
-            var input = File.ReadAllText(Path.Combine(TestParser.TestsDirectory, "ArgumentOutOfRangeException.md"));
-            _ = Markdown.ToHtml(input);
-        }
-
-        [Test]
-        public void TestInvalidCodeEscape()
-        {
-            var input = "```**Header**	";
-            _ = Markdown.ToHtml(input);
-        }
-
-        [Test]
-        public void TestEmphasisAndHtmlEntity()
-        {
-            var markdownText = "*Unlimited-Fun&#174;*&#174;";
-            TestParser.TestSpec(markdownText, "<p><em>Unlimited-Fun®</em>®</p>");
-        }
-
-        [Test]
-        public void TestThematicInsideCodeBlockInsideList()
-        {
-            var input = @"1. In the :
+    [Test]
+    public void TestThematicInsideCodeBlockInsideList()
+    {
+        var input = @"1. In the :
 
    ```
    Id                                   DisplayName         Description
    --                                   -----------         -----------
    62375ab9-6b52-47ed-826b-58e47e0e304b Group.Unified       ...
    ```";
-            TestParser.TestSpec(input, @"<ol>
+        TestParser.TestSpec(input, @"<ol>
 <li><p>In the :</p>
 <pre><code>Id                                   DisplayName         Description
 --                                   -----------         -----------
 62375ab9-6b52-47ed-826b-58e47e0e304b Group.Unified       ...
 </code></pre></li>
 </ol>");
-        }
+    }
 
-        [Test]
-        public void VisualizeMathExpressions()
-        {
-            string math = @"Math expressions
+    [Test]
+    public void VisualizeMathExpressions()
+    {
+        string math = @"Math expressions
 
 $\frac{n!}{k!(n-k)!} = \binom{n}{k}$
 
@@ -199,98 +199,122 @@ $$
 <div class=""math"">
 \begin{align}
 \sqrt{37} & = \sqrt{\frac{73^2-1}{12^2}} \\
- & = \sqrt{\frac{73^2}{12^2}\cdot\frac{73^2-1}{73^2}} \\ 
+ & = \sqrt{\frac{73^2}{12^2}\cdot\frac{73^2-1}{73^2}} \\
  & = \sqrt{\frac{73^2}{12^2}}\sqrt{\frac{73^2-1}{73^2}} \\
- & = \frac{73}{12}\sqrt{1 - \frac{1}{73^2}} \\ 
+ & = \frac{73}{12}\sqrt{1 - \frac{1}{73^2}} \\
  & \approx \frac{73}{12}\left(1 - \frac{1}{2\cdot73^2}\right)
 \end{align}
 </div>
 ";
-            //Console.WriteLine("Math Expressions:\n");
-            var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
-            var html = Markdown.ToHtml(math, pl);
-            //Console.WriteLine(html);
-        }
+        //Console.WriteLine("Math Expressions:\n");
+        var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
+        var html = Markdown.ToHtml(math, pl);
+        //Console.WriteLine(html);
+    }
 
-        [Test]
-        public void InlineMathExpression()
-        {
-            string math = @"Math expressions
+    [Test]
+    public void InlineMathExpression()
+    {
+        string math = @"Math expressions
 
 $\frac{n!}{k!(n-k)!} = \binom{n}{k}$
 ";
-            var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
+        var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
 
-            var html = Markdown.ToHtml(math, pl);
+        var html = Markdown.ToHtml(math, pl);
 
-            var test1 = html.Contains("<p><span class=\"math\">\\(");
-            var test2 = html.Contains("\\)</span></p>");
-            if (!test1 || !test2)
-            {
-                Console.WriteLine(html);
-            }
-
-            Assert.IsTrue(test1, "Leading bracket missing");
-            Assert.IsTrue(test2, "Trailing bracket missing");
+        var test1 = html.Contains("<p><span class=\"math\">\\(");
+        var test2 = html.Contains("\\)</span></p>");
+        if (!test1 || !test2)
+        {
+            Console.WriteLine(html);
         }
 
-        [Test]
-        public void BlockMathExpression()
-        {
-            string math = @"Math expressions
+        Assert.IsTrue(test1, "Leading bracket missing");
+        Assert.IsTrue(test2, "Trailing bracket missing");
+    }
+
+    [Test]
+    public void BlockMathExpression()
+    {
+        string math = @"Math expressions
 
 $$
 \frac{n!}{k!(n-k)!} = \binom{n}{k}
 $$
 ";
-            var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
+        var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
 
-            var html = Markdown.ToHtml(math, pl);
-            var test1 = html.Contains("<div class=\"math\">\n\\[");
-            var test2 = html.Contains("\\]</div>");
-            if (!test1 || !test2)
-            {
-                Console.WriteLine(html);
-            }
-
-            Assert.IsTrue(test1, "Leading bracket missing");
-            Assert.IsTrue(test2, "Trailing bracket missing");
-        }
-
-        [Test]
-        public void CanDisableParsingHeadings()
+        var html = Markdown.ToHtml(math, pl);
+        var test1 = html.Contains("<div class=\"math\">\n\\[");
+        var test2 = html.Contains("\\]</div>");
+        if (!test1 || !test2)
         {
-            var noHeadingsPipeline = new MarkdownPipelineBuilder().DisableHeadings().Build();
-
-            TestParser.TestSpec("Foo\n===", "<h1>Foo</h1>");
-            TestParser.TestSpec("Foo\n===", "<p>Foo\n===</p>", noHeadingsPipeline);
-
-            TestParser.TestSpec("# Heading 1", "<h1>Heading 1</h1>");
-            TestParser.TestSpec("# Heading 1", "<p># Heading 1</p>", noHeadingsPipeline);
-
-            // Does not also disable link reference definitions
-            TestParser.TestSpec("[Foo]\n\n[Foo]: bar", "<p><a href=\"bar\">Foo</a></p>");
-            TestParser.TestSpec("[Foo]\n\n[Foo]: bar", "<p><a href=\"bar\">Foo</a></p>", noHeadingsPipeline);
+            Console.WriteLine(html);
         }
 
-        [Test]
-        public void CanOpenAutoLinksInNewWindow()
-        {
-            var pipeline = new MarkdownPipelineBuilder().UseAutoLinks().Build();
-            var newWindowPipeline = new MarkdownPipelineBuilder().UseAutoLinks(new AutoLinkOptions() { OpenInNewWindow = true }).Build();
+        Assert.IsTrue(test1, "Leading bracket missing");
+        Assert.IsTrue(test2, "Trailing bracket missing");
+    }
 
-            TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\">www.foo.bar</a></p>", pipeline);
-            TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\" target=\"_blank\">www.foo.bar</a></p>", newWindowPipeline);
-        }
+    [Test]
+    public void CanDisableParsingHeadings()
+    {
+        var noHeadingsPipeline = new MarkdownPipelineBuilder().DisableHeadings().Build();
 
-        [Test]
-        public void CanUseHttpsPrefixForWWWAutoLinks()
-        {
-            var pipeline = new MarkdownPipelineBuilder().UseAutoLinks().Build();
-            var httpsPipeline = new MarkdownPipelineBuilder().UseAutoLinks(new AutoLinkOptions() { UseHttpsForWWWLinks = true }).Build();
+        TestParser.TestSpec("Foo\n===", "<h1>Foo</h1>");
+        TestParser.TestSpec("Foo\n===", "<p>Foo\n===</p>", noHeadingsPipeline);
 
-            TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\">www.foo.bar</a></p>", pipeline);
-            TestParser.TestSpec("www.foo.bar", "<p><a href=\"https://www.foo.bar\">www.foo.bar</a></p>", httpsPipeline);
-        }
+        TestParser.TestSpec("# Heading 1", "<h1>Heading 1</h1>");
+        TestParser.TestSpec("# Heading 1", "<p># Heading 1</p>", noHeadingsPipeline);
+
+        // Does not also disable link reference definitions
+        TestParser.TestSpec("[Foo]\n\n[Foo]: bar", "<p><a href=\"bar\">Foo</a></p>");
+        TestParser.TestSpec("[Foo]\n\n[Foo]: bar", "<p><a href=\"bar\">Foo</a></p>", noHeadingsPipeline);
+    }
+
+    [Test]
+    public void CanOpenAutoLinksInNewWindow()
+    {
+        var pipeline = new MarkdownPipelineBuilder().UseAutoLinks().Build();
+        var newWindowPipeline = new MarkdownPipelineBuilder().UseAutoLinks(new AutoLinkOptions() { OpenInNewWindow = true }).Build();
+
+        TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\">www.foo.bar</a></p>", pipeline);
+        TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\" target=\"_blank\">www.foo.bar</a></p>", newWindowPipeline);
+    }
+
+    [Test]
+    public void CanUseHttpsPrefixForWWWAutoLinks()
+    {
+        var pipeline = new MarkdownPipelineBuilder().UseAutoLinks().Build();
+        var httpsPipeline = new MarkdownPipelineBuilder().UseAutoLinks(new AutoLinkOptions() { UseHttpsForWWWLinks = true }).Build();
+
+        TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\">www.foo.bar</a></p>", pipeline);
+        TestParser.TestSpec("www.foo.bar", "<p><a href=\"https://www.foo.bar\">www.foo.bar</a></p>", httpsPipeline);
+    }
+
+    [Test]
+    public void RootInlineHasCorrectSourceSpan()
+    {
+        var pipeline = new MarkdownPipelineBuilder().UsePreciseSourceLocation().Build();
+        pipeline.TrackTrivia = true;
+
+        var document = Markdown.Parse("0123456789\n", pipeline);
+
+        var expectedSourceSpan = new SourceSpan(0, 10);
+        Assert.That(((LeafBlock)document.LastChild).Inline.Span == expectedSourceSpan);
+    }
+
+    [Test]
+    public void RootInlineInTableCellHasCorrectSourceSpan()
+    {
+        var pipeline = new MarkdownPipelineBuilder().UsePreciseSourceLocation().UseAdvancedExtensions().Build();
+        pipeline.TrackTrivia = true;
+
+        var document = Markdown.Parse("| a | b |\n| --- | --- |\n| <span id=\"dest\"></span><span id=\"DEST\"></span>*dest*<br/> | \\[in\\] The address of the result of the operation.<br/> |", pipeline);
+
+        var paragraph = (ParagraphBlock)((TableCell)((TableRow)((Table)document.LastChild).LastChild).First()).LastChild;
+        Assert.That(paragraph.Inline.Span.Start == paragraph.Inline.FirstChild.Span.Start);
+        Assert.That(paragraph.Inline.Span.End == paragraph.Inline.LastChild.Span.End);
     }
 }

src/Markdig.Tests/Program.cs

@@ -2,18 +2,15 @@
 // This file is licensed under the BSD-Clause 2 license.
 // See the license.txt file in the project root for more information.
 
-using System;
+namespace Markdig.Tests;
 
-namespace Markdig.Tests
+class Program
 {
-    class Program
+    public static void Main(string[] args)
     {
-        public static void Main(string[] args)
-        {
-            Console.WriteLine("Run NUnit tests runner with this");
-            // Uncomment the following line to debug a specific tests more easily
-            //var tests = new Specs.CommonMarkV_0_29.TestLeafBlocksSetextHeadings();
-            //tests.LeafBlocksSetextHeadings_Example063();
-        }
+        Console.WriteLine("Run NUnit tests runner with this");
+        // Uncomment the following line to debug a specific tests more easily
+        //var tests = new Specs.CommonMarkV_0_29.TestLeafBlocksSetextHeadings();
+        //tests.LeafBlocksSetextHeadings_Example063();
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestAtxHeading.cs

@@ -1,55 +1,53 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestAtxHeading
 {
-    [TestFixture]
-    public class TestAtxHeading
+    [TestCase("# h")]
+    [TestCase("# h ")]
+    [TestCase("# h\n#h")]
+    [TestCase("# h\n #h")]
+    [TestCase("# h\n # h")]
+    [TestCase("# h\n # h ")]
+    [TestCase(" #  h   \n    #     h      ")]
+    public void Test(string value)
     {
-        [TestCase("# h")]
-        [TestCase("# h ")]
-        [TestCase("# h\n#h")]
-        [TestCase("# h\n #h")]
-        [TestCase("# h\n # h")]
-        [TestCase("# h\n # h ")]
-        [TestCase(" #  h   \n    #     h      ")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+        RoundTrip(value);
+    }
 
-        [TestCase("\n# h\n\np")]
-        [TestCase("\n# h\n\np\n")]
-        [TestCase("\n# h\n\np\n\n")]
-        [TestCase("\n\n# h\n\np\n\n")]
-        [TestCase("\n\n# h\np\n\n")]
-        [TestCase("\n\n# h\np\n\n")]
-        public void TestParagraph(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("\n# h\n\np")]
+    [TestCase("\n# h\n\np\n")]
+    [TestCase("\n# h\n\np\n\n")]
+    [TestCase("\n\n# h\n\np\n\n")]
+    [TestCase("\n\n# h\np\n\n")]
+    [TestCase("\n\n# h\np\n\n")]
+    public void TestParagraph(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("\n# h")]
-        [TestCase("\n# h\n")]
-        [TestCase("\n# h\r")]
-        [TestCase("\n# h\r\n")]
+    [TestCase("\n# h")]
+    [TestCase("\n# h\n")]
+    [TestCase("\n# h\r")]
+    [TestCase("\n# h\r\n")]
 
-        [TestCase("\r# h")]
-        [TestCase("\r# h\n")]
-        [TestCase("\r# h\r")]
-        [TestCase("\r# h\r\n")]
+    [TestCase("\r# h")]
+    [TestCase("\r# h\n")]
+    [TestCase("\r# h\r")]
+    [TestCase("\r# h\r\n")]
 
-        [TestCase("\r\n# h")]
-        [TestCase("\r\n# h\n")]
-        [TestCase("\r\n# h\r")]
-        [TestCase("\r\n# h\r\n")]
+    [TestCase("\r\n# h")]
+    [TestCase("\r\n# h\n")]
+    [TestCase("\r\n# h\r")]
+    [TestCase("\r\n# h\r\n")]
 
-        [TestCase("# h\n\n ")]
-        [TestCase("# h\n\n  ")]
-        [TestCase("# h\n\n   ")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("# h\n\n ")]
+    [TestCase("# h\n\n  ")]
+    [TestCase("# h\n\n   ")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestFencedCodeBlock.cs

@@ -1,107 +1,105 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestFencedCodeBlock
 {
-    [TestFixture]
-    public class TestFencedCodeBlock
+    [TestCase("```\nc\n```")]
+    [TestCase("```\nc\n```\n")]
+    [TestCase("\n```\nc\n```")]
+    [TestCase("\n\n```\nc\n```")]
+    [TestCase("```\nc\n```\n")]
+    [TestCase("```\nc\n```\n\n")]
+    [TestCase("\n```\nc\n```\n")]
+    [TestCase("\n```\nc\n```\n\n")]
+    [TestCase("\n\n```\nc\n```\n")]
+    [TestCase("\n\n```\nc\n```\n\n")]
+
+    [TestCase(" ```\nc\n````")]
+    [TestCase("```\nc\n````")]
+    [TestCase("p\n\n```\nc\n```")]
+
+    [TestCase("```\n c\n```")]
+    [TestCase("```\nc \n```")]
+    [TestCase("```\n c \n```")]
+
+    [TestCase(" ``` \n c \n ``` ")]
+    [TestCase("\t```\t\n\tc\t\n\t```\t")]
+    [TestCase("\v```\v\n\vc\v\n\v```\v")]
+    [TestCase("\f```\f\n\fc\f\n\f```\f")]
+    public void Test(string value)
     {
-        [TestCase("```\nc\n```")]
-        [TestCase("```\nc\n```\n")]
-        [TestCase("\n```\nc\n```")]
-        [TestCase("\n\n```\nc\n```")]
-        [TestCase("```\nc\n```\n")]
-        [TestCase("```\nc\n```\n\n")]
-        [TestCase("\n```\nc\n```\n")]
-        [TestCase("\n```\nc\n```\n\n")]
-        [TestCase("\n\n```\nc\n```\n")]
-        [TestCase("\n\n```\nc\n```\n\n")]
+        RoundTrip(value);
+    }
 
-        [TestCase(" ```\nc\n````")]
-        [TestCase("```\nc\n````")]
-        [TestCase("p\n\n```\nc\n```")]
+    [TestCase("~~~ aa ``` ~~~\nfoo\n~~~")]
+    [TestCase("~~~ aa ``` ~~~\nfoo\n~~~ ")]
+    public void TestTilde(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("```\n c\n```")]
-        [TestCase("```\nc \n```")]
-        [TestCase("```\n c \n```")]
+    [TestCase("```\n c \n```")]
+    [TestCase("```\n c \r```")]
+    [TestCase("```\n c \r\n```")]
+    [TestCase("```\r c \n```")]
+    [TestCase("```\r c \r```")]
+    [TestCase("```\r c \r\n```")]
+    [TestCase("```\r\n c \n```")]
+    [TestCase("```\r\n c \r```")]
+    [TestCase("```\r\n c \r\n```")]
 
-        [TestCase(" ``` \n c \n ``` ")]
-        [TestCase("\t```\t\n\tc\t\n\t```\t")]
-        [TestCase("\v```\v\n\vc\v\n\v```\v")]
-        [TestCase("\f```\f\n\fc\f\n\f```\f")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("```\n c \n```\n")]
+    [TestCase("```\n c \r```\n")]
+    [TestCase("```\n c \r\n```\n")]
+    [TestCase("```\r c \n```\n")]
+    [TestCase("```\r c \r```\n")]
+    [TestCase("```\r c \r\n```\n")]
+    [TestCase("```\r\n c \n```\n")]
+    [TestCase("```\r\n c \r```\n")]
+    [TestCase("```\r\n c \r\n```\n")]
 
-        [TestCase("~~~ aa ``` ~~~\nfoo\n~~~")]
-        [TestCase("~~~ aa ``` ~~~\nfoo\n~~~ ")]
-        public void TestTilde(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("```\n c \n```\r")]
+    [TestCase("```\n c \r```\r")]
+    [TestCase("```\n c \r\n```\r")]
+    [TestCase("```\r c \n```\r")]
+    [TestCase("```\r c \r```\r")]
+    [TestCase("```\r c \r\n```\r")]
+    [TestCase("```\r\n c \n```\r")]
+    [TestCase("```\r\n c \r```\r")]
+    [TestCase("```\r\n c \r\n```\r")]
 
-        [TestCase("```\n c \n```")]
-        [TestCase("```\n c \r```")]
-        [TestCase("```\n c \r\n```")]
-        [TestCase("```\r c \n```")]
-        [TestCase("```\r c \r```")]
-        [TestCase("```\r c \r\n```")]
-        [TestCase("```\r\n c \n```")]
-        [TestCase("```\r\n c \r```")]
-        [TestCase("```\r\n c \r\n```")]
+    [TestCase("```\n c \n```\r\n")]
+    [TestCase("```\n c \r```\r\n")]
+    [TestCase("```\n c \r\n```\r\n")]
+    [TestCase("```\r c \n```\r\n")]
+    [TestCase("```\r c \r```\r\n")]
+    [TestCase("```\r c \r\n```\r\n")]
+    [TestCase("```\r\n c \n```\r\n")]
+    [TestCase("```\r\n c \r```\r\n")]
+    [TestCase("```\r\n c \r\n```\r\n")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("```\n c \n```\n")]
-        [TestCase("```\n c \r```\n")]
-        [TestCase("```\n c \r\n```\n")]
-        [TestCase("```\r c \n```\n")]
-        [TestCase("```\r c \r```\n")]
-        [TestCase("```\r c \r\n```\n")]
-        [TestCase("```\r\n c \n```\n")]
-        [TestCase("```\r\n c \r```\n")]
-        [TestCase("```\r\n c \r\n```\n")]
+    [TestCase("```i a\n```")]
+    [TestCase("```i a a2\n```")]
+    [TestCase("```i a a2 a3\n```")]
+    [TestCase("```i a a2 a3 a4\n```")]
 
-        [TestCase("```\n c \n```\r")]
-        [TestCase("```\n c \r```\r")]
-        [TestCase("```\n c \r\n```\r")]
-        [TestCase("```\r c \n```\r")]
-        [TestCase("```\r c \r```\r")]
-        [TestCase("```\r c \r\n```\r")]
-        [TestCase("```\r\n c \n```\r")]
-        [TestCase("```\r\n c \r```\r")]
-        [TestCase("```\r\n c \r\n```\r")]
+    [TestCase("```i\ta\n```")]
+    [TestCase("```i\ta a2\n```")]
+    [TestCase("```i\ta a2 a3\n```")]
+    [TestCase("```i\ta a2 a3 a4\n```")]
 
-        [TestCase("```\n c \n```\r\n")]
-        [TestCase("```\n c \r```\r\n")]
-        [TestCase("```\n c \r\n```\r\n")]
-        [TestCase("```\r c \n```\r\n")]
-        [TestCase("```\r c \r```\r\n")]
-        [TestCase("```\r c \r\n```\r\n")]
-        [TestCase("```\r\n c \n```\r\n")]
-        [TestCase("```\r\n c \r```\r\n")]
-        [TestCase("```\r\n c \r\n```\r\n")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("```i a\n```")]
-        [TestCase("```i a a2\n```")]
-        [TestCase("```i a a2 a3\n```")]
-        [TestCase("```i a a2 a3 a4\n```")]
-
-        [TestCase("```i\ta\n```")]
-        [TestCase("```i\ta a2\n```")]
-        [TestCase("```i\ta a2 a3\n```")]
-        [TestCase("```i\ta a2 a3 a4\n```")]
-
-        [TestCase("```i\ta \n```")]
-        [TestCase("```i\ta a2 \n```")]
-        [TestCase("```i\ta a2 a3 \n```")]
-        [TestCase("```i\ta a2 a3 a4 \n```")]
-        public void TestInfoArguments(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("```i\ta \n```")]
+    [TestCase("```i\ta a2 \n```")]
+    [TestCase("```i\ta a2 a3 \n```")]
+    [TestCase("```i\ta a2 a3 a4 \n```")]
+    public void TestInfoArguments(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestHtmlBlock.cs

@@ -1,20 +1,18 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestHtmlBlock
 {
-    [TestFixture]
-    public class TestHtmlBlock
+    [TestCase("<br>")]
+    [TestCase("<br>\n")]
+    [TestCase("<br>\n\n")]
+    [TestCase("<div></div>\n\n# h")]
+    [TestCase("p\n\n<div></div>\n")]
+    [TestCase("<div></div>\n\n# h")]
+    public void Test(string value)
     {
-        [TestCase("<br>")]
-        [TestCase("<br>\n")]
-        [TestCase("<br>\n\n")]
-        [TestCase("<div></div>\n\n# h")]
-        [TestCase("p\n\n<div></div>\n")]
-        [TestCase("<div></div>\n\n# h")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestIndentedCodeBlock.cs

@@ -1,86 +1,84 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestIndentedCodeBlock
 {
-    [TestFixture]
-    public class TestIndentedCodeBlock
+    // A codeblock is indented with 4 spaces. After the 4th space, whitespace is interpreted as content.
+    // l = line
+    [TestCase("    l")]
+    [TestCase("     l")]
+    [TestCase("\tl")]
+    [TestCase("\t\tl")]
+    [TestCase("\tl1\n    l1")]
+
+    [TestCase("\n    l")]
+    [TestCase("\n\n    l")]
+    [TestCase("\n    l\n")]
+    [TestCase("\n    l\n\n")]
+    [TestCase("\n\n    l\n")]
+    [TestCase("\n\n    l\n\n")]
+
+    [TestCase("    l\n    l")]
+    [TestCase("    l\n    l\n    l")]
+
+
+    // two newlines are needed for indented codeblock start after paragraph
+    [TestCase("p\n\n    l")]
+    [TestCase("p\n\n    l\n")]
+    [TestCase("p\n\n    l\n\n")]
+
+    [TestCase("p\n\n    l\n    l")]
+    [TestCase("p\n\n    l\n     l")]
+
+    [TestCase("    l\n\np\n\n    l")]
+    [TestCase("    l    l\n\np\n\n    l    l")]
+    public void Test(string value)
     {
-        // A codeblock is indented with 4 spaces. After the 4th space, whitespace is interpreted as content.
-        // l = line
-        [TestCase("    l")]
-        [TestCase("     l")]
-        [TestCase("\tl")]
-        [TestCase("\t\tl")]
-        [TestCase("\tl1\n    l1")]
+        RoundTrip(value);
+    }
 
-        [TestCase("\n    l")]
-        [TestCase("\n\n    l")]
-        [TestCase("\n    l\n")]
-        [TestCase("\n    l\n\n")]
-        [TestCase("\n\n    l\n")]
-        [TestCase("\n\n    l\n\n")]
+    [TestCase("    l\n")]
+    [TestCase("    l\r")]
+    [TestCase("    l\r\n")]
 
-        [TestCase("    l\n    l")]
-        [TestCase("    l\n    l\n    l")]
+    [TestCase("    l\n    l")]
+    [TestCase("    l\n    l\n")]
+    [TestCase("    l\n    l\r")]
+    [TestCase("    l\n    l\r\n")]
 
+    [TestCase("    l\r    l")]
+    [TestCase("    l\r    l\n")]
+    [TestCase("    l\r    l\r")]
+    [TestCase("    l\r    l\r\n")]
 
-        // two newlines are needed for indented codeblock start after paragraph
-        [TestCase("p\n\n    l")]
-        [TestCase("p\n\n    l\n")]
-        [TestCase("p\n\n    l\n\n")]
+    [TestCase("    l\r\n    l")]
+    [TestCase("    l\r\n    l\n")]
+    [TestCase("    l\r\n    l\r")]
+    [TestCase("    l\r\n    l\r\n")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("p\n\n    l\n    l")]
-        [TestCase("p\n\n    l\n     l")]
+    [TestCase("    l\n\n    l\n")]
+    [TestCase("    l\n\n\n    l\n")]
+    public void TestNewlinesInBetweenResultInOneCodeBlock(string value)
+    {
+        var pipelineBuilder = new MarkdownPipelineBuilder();
+        pipelineBuilder.EnableTrackTrivia();
+        MarkdownPipeline pipeline = pipelineBuilder.Build();
+        var markdownDocument = Markdown.Parse(value, pipeline);
 
-        [TestCase("    l\n\np\n\n    l")]
-        [TestCase("    l    l\n\np\n\n    l    l")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+        Assert.AreEqual(1, markdownDocument.Count);
+    }
 
-        [TestCase("    l\n")]
-        [TestCase("    l\r")]
-        [TestCase("    l\r\n")]
-
-        [TestCase("    l\n    l")]
-        [TestCase("    l\n    l\n")]
-        [TestCase("    l\n    l\r")]
-        [TestCase("    l\n    l\r\n")]
-
-        [TestCase("    l\r    l")]
-        [TestCase("    l\r    l\n")]
-        [TestCase("    l\r    l\r")]
-        [TestCase("    l\r    l\r\n")]
-
-        [TestCase("    l\r\n    l")]
-        [TestCase("    l\r\n    l\n")]
-        [TestCase("    l\r\n    l\r")]
-        [TestCase("    l\r\n    l\r\n")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("    l\n\n    l\n")]
-        [TestCase("    l\n\n\n    l\n")]
-        public void TestNewlinesInBetweenResultInOneCodeBlock(string value)
-        {
-            var pipelineBuilder = new MarkdownPipelineBuilder();
-            pipelineBuilder.EnableTrackTrivia();
-            MarkdownPipeline pipeline = pipelineBuilder.Build();
-            var markdownDocument = Markdown.Parse(value, pipeline);
-
-            Assert.AreEqual(1, markdownDocument.Count);
-        }
-
-        [TestCase("    l\n\np")]
-        [TestCase("    l\n\n\np")]
-        [TestCase("    l\n\n\n\np")]
-        public void TestParagraph(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("    l\n\np")]
+    [TestCase("    l\n\n\np")]
+    [TestCase("    l\n\n\n\np")]
+    public void TestParagraph(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestLinkReferenceDefinition.cs

@@ -1,214 +1,212 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestLinkReferenceDefinition
 {
-    [TestFixture]
-    public class TestLinkReferenceDefinition
+    [TestCase(@"[a]: /r")]
+    [TestCase(@" [a]: /r")]
+    [TestCase(@"  [a]: /r")]
+    [TestCase(@"   [a]: /r")]
+
+    [TestCase(@"[a]:  /r")]
+    [TestCase(@" [a]:  /r")]
+    [TestCase(@"  [a]:  /r")]
+    [TestCase(@"   [a]:  /r")]
+
+    [TestCase(@"[a]:  /r ")]
+    [TestCase(@" [a]:  /r ")]
+    [TestCase(@"  [a]:  /r ")]
+    [TestCase(@"   [a]:  /r ")]
+
+    [TestCase(@"[a]: /r ""l""")]
+    [TestCase(@"[a]:  /r ""l""")]
+    [TestCase(@"[a]: /r  ""l""")]
+    [TestCase(@"[a]: /r ""l"" ")]
+    [TestCase(@"[a]:  /r  ""l""")]
+    [TestCase(@"[a]:  /r  ""l"" ")]
+
+    [TestCase(@" [a]: /r ""l""")]
+    [TestCase(@" [a]:  /r ""l""")]
+    [TestCase(@" [a]: /r  ""l""")]
+    [TestCase(@" [a]: /r ""l"" ")]
+    [TestCase(@" [a]:  /r  ""l""")]
+    [TestCase(@" [a]:  /r  ""l"" ")]
+
+    [TestCase(@"  [a]: /r ""l""")]
+    [TestCase(@"  [a]:  /r ""l""")]
+    [TestCase(@"  [a]: /r  ""l""")]
+    [TestCase(@"  [a]: /r ""l"" ")]
+    [TestCase(@"  [a]:  /r  ""l""")]
+    [TestCase(@"  [a]:  /r  ""l"" ")]
+
+    [TestCase(@"   [a]: /r ""l""")]
+    [TestCase(@"   [a]:  /r ""l""")]
+    [TestCase(@"   [a]: /r  ""l""")]
+    [TestCase(@"   [a]: /r ""l"" ")]
+    [TestCase(@"   [a]:  /r  ""l""")]
+    [TestCase(@"   [a]:  /r  ""l"" ")]
+
+    [TestCase("[a]:\t/r")]
+    [TestCase("[a]:\t/r\t")]
+    [TestCase("[a]:\t/r\t\"l\"")]
+    [TestCase("[a]:\t/r\t\"l\"\t")]
+
+    [TestCase("[a]: \t/r")]
+    [TestCase("[a]: \t/r\t")]
+    [TestCase("[a]: \t/r\t\"l\"")]
+    [TestCase("[a]: \t/r\t\"l\"\t")]
+
+    [TestCase("[a]:\t /r")]
+    [TestCase("[a]:\t /r\t")]
+    [TestCase("[a]:\t /r\t\"l\"")]
+    [TestCase("[a]:\t /r\t\"l\"\t")]
+
+    [TestCase("[a]: \t /r")]
+    [TestCase("[a]: \t /r\t")]
+    [TestCase("[a]: \t /r\t\"l\"")]
+    [TestCase("[a]: \t /r\t\"l\"\t")]
+
+    [TestCase("[a]:\t/r \t")]
+    [TestCase("[a]:\t/r \t\"l\"")]
+    [TestCase("[a]:\t/r \t\"l\"\t")]
+
+    [TestCase("[a]: \t/r")]
+    [TestCase("[a]: \t/r \t")]
+    [TestCase("[a]: \t/r \t\"l\"")]
+    [TestCase("[a]: \t/r \t\"l\"\t")]
+
+    [TestCase("[a]:\t /r")]
+    [TestCase("[a]:\t /r \t")]
+    [TestCase("[a]:\t /r \t\"l\"")]
+    [TestCase("[a]:\t /r \t\"l\"\t")]
+
+    [TestCase("[a]: \t /r")]
+    [TestCase("[a]: \t /r \t")]
+    [TestCase("[a]: \t /r \t\"l\"")]
+    [TestCase("[a]: \t /r \t\"l\"\t")]
+
+    [TestCase("[a]:\t/r\t ")]
+    [TestCase("[a]:\t/r\t \"l\"")]
+    [TestCase("[a]:\t/r\t \"l\"\t")]
+
+    [TestCase("[a]: \t/r")]
+    [TestCase("[a]: \t/r\t ")]
+    [TestCase("[a]: \t/r\t \"l\"")]
+    [TestCase("[a]: \t/r\t \"l\"\t")]
+
+    [TestCase("[a]:\t /r")]
+    [TestCase("[a]:\t /r\t ")]
+    [TestCase("[a]:\t /r\t \"l\"")]
+    [TestCase("[a]:\t /r\t \"l\"\t")]
+
+    [TestCase("[a]: \t /r")]
+    [TestCase("[a]: \t /r\t ")]
+    [TestCase("[a]: \t /r\t \"l\"")]
+    [TestCase("[a]: \t /r\t \"l\"\t")]
+
+    [TestCase("[a]:\t/r \t ")]
+    [TestCase("[a]:\t/r \t \"l\"")]
+    [TestCase("[a]:\t/r \t \"l\"\t")]
+
+    [TestCase("[a]: \t/r")]
+    [TestCase("[a]: \t/r \t ")]
+    [TestCase("[a]: \t/r \t \"l\"")]
+    [TestCase("[a]: \t/r \t \"l\"\t")]
+
+    [TestCase("[a]:\t /r")]
+    [TestCase("[a]:\t /r \t ")]
+    [TestCase("[a]:\t /r \t \"l\"")]
+    [TestCase("[a]:\t /r \t \"l\"\t")]
+
+    [TestCase("[a]: \t /r")]
+    [TestCase("[a]: \t /r \t ")]
+    [TestCase("[a]: \t /r \t \"l\"")]
+    [TestCase("[a]: \t /r \t \"l\"\t")]
+    public void Test(string value)
     {
-        [TestCase(@"[a]: /r")]
-        [TestCase(@" [a]: /r")]
-        [TestCase(@"  [a]: /r")]
-        [TestCase(@"   [a]: /r")]
+        RoundTrip(value);
+    }
 
-        [TestCase(@"[a]:  /r")]
-        [TestCase(@" [a]:  /r")]
-        [TestCase(@"  [a]:  /r")]
-        [TestCase(@"   [a]:  /r")]
+    [TestCase("[a]: /r\n[b]: /r\n")]
+    [TestCase("[a]: /r\n[b]: /r\n[c] /r\n")]
+    public void TestMultiple(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase(@"[a]:  /r ")]
-        [TestCase(@" [a]:  /r ")]
-        [TestCase(@"  [a]:  /r ")]
-        [TestCase(@"   [a]:  /r ")]
+    [TestCase("[a]:\f/r\f\"l\"")]
+    [TestCase("[a]:\v/r\v\"l\"")]
+    public void TestUncommonWhitespace(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase(@"[a]: /r ""l""")]
-        [TestCase(@"[a]:  /r ""l""")]
-        [TestCase(@"[a]: /r  ""l""")]
-        [TestCase(@"[a]: /r ""l"" ")]
-        [TestCase(@"[a]:  /r  ""l""")]
-        [TestCase(@"[a]:  /r  ""l"" ")]
+    [TestCase("[a]:\n/r\n\"t\"")]
+    [TestCase("[a]:\n/r\r\"t\"")]
+    [TestCase("[a]:\n/r\r\n\"t\"")]
 
-        [TestCase(@" [a]: /r ""l""")]
-        [TestCase(@" [a]:  /r ""l""")]
-        [TestCase(@" [a]: /r  ""l""")]
-        [TestCase(@" [a]: /r ""l"" ")]
-        [TestCase(@" [a]:  /r  ""l""")]
-        [TestCase(@" [a]:  /r  ""l"" ")]
+    [TestCase("[a]:\r/r\n\"t\"")]
+    [TestCase("[a]:\r/r\r\"t\"")]
+    [TestCase("[a]:\r/r\r\n\"t\"")]
 
-        [TestCase(@"  [a]: /r ""l""")]
-        [TestCase(@"  [a]:  /r ""l""")]
-        [TestCase(@"  [a]: /r  ""l""")]
-        [TestCase(@"  [a]: /r ""l"" ")]
-        [TestCase(@"  [a]:  /r  ""l""")]
-        [TestCase(@"  [a]:  /r  ""l"" ")]
+    [TestCase("[a]:\r\n/r\n\"t\"")]
+    [TestCase("[a]:\r\n/r\r\"t\"")]
+    [TestCase("[a]:\r\n/r\r\n\"t\"")]
 
-        [TestCase(@"   [a]: /r ""l""")]
-        [TestCase(@"   [a]:  /r ""l""")]
-        [TestCase(@"   [a]: /r  ""l""")]
-        [TestCase(@"   [a]: /r ""l"" ")]
-        [TestCase(@"   [a]:  /r  ""l""")]
-        [TestCase(@"   [a]:  /r  ""l"" ")]
+    [TestCase("[a]:\n/r\n\"t\nt\"")]
+    [TestCase("[a]:\n/r\n\"t\rt\"")]
+    [TestCase("[a]:\n/r\n\"t\r\nt\"")]
 
-        [TestCase("[a]:\t/r")]
-        [TestCase("[a]:\t/r\t")]
-        [TestCase("[a]:\t/r\t\"l\"")]
-        [TestCase("[a]:\t/r\t\"l\"\t")]
+    [TestCase("[a]:\r\n  /r\t \n \t \"t\r\nt\"   ")]
+    [TestCase("[a]:\n/r\n\n[a],")]
+    [TestCase("[a]: /r\n[b]: /r\n\n[a],")]
+    public void TestNewlines(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("[a]: \t/r")]
-        [TestCase("[a]: \t/r\t")]
-        [TestCase("[a]: \t/r\t\"l\"")]
-        [TestCase("[a]: \t/r\t\"l\"\t")]
+    [TestCase("[ a]: /r")]
+    [TestCase("[a ]: /r")]
+    [TestCase("[ a ]: /r")]
+    [TestCase("[  a]: /r")]
+    [TestCase("[  a ]: /r")]
+    [TestCase("[a  ]: /r")]
+    [TestCase("[ a  ]: /r")]
+    [TestCase("[  a  ]: /r")]
+    [TestCase("[a a]: /r")]
+    [TestCase("[a\va]: /r")]
+    [TestCase("[a\fa]: /r")]
+    [TestCase("[a\ta]: /r")]
+    [TestCase("[\va]: /r")]
+    [TestCase("[\fa]: /r")]
+    [TestCase("[\ta]: /r")]
+    [TestCase(@"[\]]: /r")]
+    public void TestLabel(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("[a]:\t /r")]
-        [TestCase("[a]:\t /r\t")]
-        [TestCase("[a]:\t /r\t\"l\"")]
-        [TestCase("[a]:\t /r\t\"l\"\t")]
+    [TestCase("[a]: /r ()")]
+    [TestCase("[a]: /r (t)")]
+    [TestCase("[a]: /r ( t)")]
+    [TestCase("[a]: /r (t )")]
+    [TestCase("[a]: /r ( t )")]
 
-        [TestCase("[a]: \t /r")]
-        [TestCase("[a]: \t /r\t")]
-        [TestCase("[a]: \t /r\t\"l\"")]
-        [TestCase("[a]: \t /r\t\"l\"\t")]
+    [TestCase("[a]: /r ''")]
+    [TestCase("[a]: /r 't'")]
+    [TestCase("[a]: /r ' t'")]
+    [TestCase("[a]: /r 't '")]
+    [TestCase("[a]: /r ' t '")]
+    public void Test_Title(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("[a]:\t/r \t")]
-        [TestCase("[a]:\t/r \t\"l\"")]
-        [TestCase("[a]:\t/r \t\"l\"\t")]
-
-        [TestCase("[a]: \t/r")]
-        [TestCase("[a]: \t/r \t")]
-        [TestCase("[a]: \t/r \t\"l\"")]
-        [TestCase("[a]: \t/r \t\"l\"\t")]
-
-        [TestCase("[a]:\t /r")]
-        [TestCase("[a]:\t /r \t")]
-        [TestCase("[a]:\t /r \t\"l\"")]
-        [TestCase("[a]:\t /r \t\"l\"\t")]
-
-        [TestCase("[a]: \t /r")]
-        [TestCase("[a]: \t /r \t")]
-        [TestCase("[a]: \t /r \t\"l\"")]
-        [TestCase("[a]: \t /r \t\"l\"\t")]
-
-        [TestCase("[a]:\t/r\t ")]
-        [TestCase("[a]:\t/r\t \"l\"")]
-        [TestCase("[a]:\t/r\t \"l\"\t")]
-
-        [TestCase("[a]: \t/r")]
-        [TestCase("[a]: \t/r\t ")]
-        [TestCase("[a]: \t/r\t \"l\"")]
-        [TestCase("[a]: \t/r\t \"l\"\t")]
-
-        [TestCase("[a]:\t /r")]
-        [TestCase("[a]:\t /r\t ")]
-        [TestCase("[a]:\t /r\t \"l\"")]
-        [TestCase("[a]:\t /r\t \"l\"\t")]
-
-        [TestCase("[a]: \t /r")]
-        [TestCase("[a]: \t /r\t ")]
-        [TestCase("[a]: \t /r\t \"l\"")]
-        [TestCase("[a]: \t /r\t \"l\"\t")]
-
-        [TestCase("[a]:\t/r \t ")]
-        [TestCase("[a]:\t/r \t \"l\"")]
-        [TestCase("[a]:\t/r \t \"l\"\t")]
-
-        [TestCase("[a]: \t/r")]
-        [TestCase("[a]: \t/r \t ")]
-        [TestCase("[a]: \t/r \t \"l\"")]
-        [TestCase("[a]: \t/r \t \"l\"\t")]
-
-        [TestCase("[a]:\t /r")]
-        [TestCase("[a]:\t /r \t ")]
-        [TestCase("[a]:\t /r \t \"l\"")]
-        [TestCase("[a]:\t /r \t \"l\"\t")]
-
-        [TestCase("[a]: \t /r")]
-        [TestCase("[a]: \t /r \t ")]
-        [TestCase("[a]: \t /r \t \"l\"")]
-        [TestCase("[a]: \t /r \t \"l\"\t")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("[a]: /r\n[b]: /r\n")]
-        [TestCase("[a]: /r\n[b]: /r\n[c] /r\n")]
-        public void TestMultiple(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("[a]:\f/r\f\"l\"")]
-        [TestCase("[a]:\v/r\v\"l\"")]
-        public void TestUncommonWhitespace(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("[a]:\n/r\n\"t\"")]
-        [TestCase("[a]:\n/r\r\"t\"")]
-        [TestCase("[a]:\n/r\r\n\"t\"")]
-
-        [TestCase("[a]:\r/r\n\"t\"")]
-        [TestCase("[a]:\r/r\r\"t\"")]
-        [TestCase("[a]:\r/r\r\n\"t\"")]
-
-        [TestCase("[a]:\r\n/r\n\"t\"")]
-        [TestCase("[a]:\r\n/r\r\"t\"")]
-        [TestCase("[a]:\r\n/r\r\n\"t\"")]
-
-        [TestCase("[a]:\n/r\n\"t\nt\"")]
-        [TestCase("[a]:\n/r\n\"t\rt\"")]
-        [TestCase("[a]:\n/r\n\"t\r\nt\"")]
-
-        [TestCase("[a]:\r\n  /r\t \n \t \"t\r\nt\"   ")]
-        [TestCase("[a]:\n/r\n\n[a],")]
-        [TestCase("[a]: /r\n[b]: /r\n\n[a],")]
-        public void TestNewlines(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("[ a]: /r")]
-        [TestCase("[a ]: /r")]
-        [TestCase("[ a ]: /r")]
-        [TestCase("[  a]: /r")]
-        [TestCase("[  a ]: /r")]
-        [TestCase("[a  ]: /r")]
-        [TestCase("[ a  ]: /r")]
-        [TestCase("[  a  ]: /r")]
-        [TestCase("[a a]: /r")]
-        [TestCase("[a\va]: /r")]
-        [TestCase("[a\fa]: /r")]
-        [TestCase("[a\ta]: /r")]
-        [TestCase("[\va]: /r")]
-        [TestCase("[\fa]: /r")]
-        [TestCase("[\ta]: /r")]
-        [TestCase(@"[\]]: /r")]
-        public void TestLabel(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("[a]: /r ()")]
-        [TestCase("[a]: /r (t)")]
-        [TestCase("[a]: /r ( t)")]
-        [TestCase("[a]: /r (t )")]
-        [TestCase("[a]: /r ( t )")]
-
-        [TestCase("[a]: /r ''")]
-        [TestCase("[a]: /r 't'")]
-        [TestCase("[a]: /r ' t'")]
-        [TestCase("[a]: /r 't '")]
-        [TestCase("[a]: /r ' t '")]
-        public void Test_Title(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("[a]: /r\n===\n[a]")]
-        public void TestSetextHeader(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("[a]: /r\n===\n[a]")]
+    public void TestSetextHeader(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestNoBlocksFoundBlock.cs

@@ -1,23 +1,21 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestNoBlocksFoundBlock
 {
-    [TestFixture]
-    public class TestNoBlocksFoundBlock
+    [TestCase("\r")]
+    [TestCase("\n")]
+    [TestCase("\r\n")]
+    [TestCase("\t")]
+    [TestCase("\v")]
+    [TestCase("\f")]
+    [TestCase(" ")]
+    [TestCase("  ")]
+    [TestCase("   ")]
+    public void Test(string value)
     {
-        [TestCase("\r")]
-        [TestCase("\n")]
-        [TestCase("\r\n")]
-        [TestCase("\t")]
-        [TestCase("\v")]
-        [TestCase("\f")]
-        [TestCase(" ")]
-        [TestCase("  ")]
-        [TestCase("   ")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestOrderedList.cs

@@ -1,191 +1,189 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestOrderedList
 {
-    [TestFixture]
-    public class TestOrderedList
+    [TestCase("1. i")]
+    [TestCase("1.  i")]
+    [TestCase("1. i ")]
+    [TestCase("1.  i ")]
+    [TestCase("1.  i  ")]
+
+    [TestCase(" 1. i")]
+    [TestCase(" 1.  i")]
+    [TestCase(" 1. i ")]
+    [TestCase(" 1.  i ")]
+    [TestCase(" 1.  i  ")]
+
+    [TestCase("  1. i")]
+    [TestCase("  1.  i")]
+    [TestCase("  1. i ")]
+    [TestCase("  1.  i ")]
+    [TestCase("  1.  i  ")]
+
+    [TestCase("   1. i")]
+    [TestCase("   1.  i")]
+    [TestCase("   1. i ")]
+    [TestCase("   1.  i ")]
+    [TestCase("   1.  i  ")]
+
+    [TestCase("1. i\n")]
+    [TestCase("1.  i\n")]
+    [TestCase("1. i \n")]
+    [TestCase("1.  i \n")]
+    [TestCase("1.  i  \n")]
+
+    [TestCase(" 1. i\n")]
+    [TestCase(" 1.  i\n")]
+    [TestCase(" 1. i \n")]
+    [TestCase(" 1.  i \n")]
+    [TestCase(" 1.  i  \n")]
+
+    [TestCase("  1. i\n")]
+    [TestCase("  1.  i\n")]
+    [TestCase("  1. i \n")]
+    [TestCase("  1.  i \n")]
+    [TestCase("  1.  i  \n")]
+
+    [TestCase("   1. i\n")]
+    [TestCase("   1.  i\n")]
+    [TestCase("   1. i \n")]
+    [TestCase("   1.  i \n")]
+    [TestCase("   1.  i  \n")]
+
+    [TestCase("1. i\n2. j")]
+    [TestCase("1.  i\n2. j")]
+    [TestCase("1. i \n2. j")]
+    [TestCase("1.  i \n2. j")]
+    [TestCase("1.  i  \n2. j")]
+
+    [TestCase(" 1. i\n2. j")]
+    [TestCase(" 1.  i\n2. j")]
+    [TestCase(" 1. i \n2. j")]
+    [TestCase(" 1.  i \n2. j")]
+    [TestCase(" 1.  i  \n2. j")]
+
+    [TestCase("  1. i\n2. j")]
+    [TestCase("  1.  i\n2. j")]
+    [TestCase("  1. i \n2. j")]
+    [TestCase("  1.  i \n2. j")]
+    [TestCase("  1.  i  \n2. j")]
+
+    [TestCase("   1. i\n2. j")]
+    [TestCase("   1.  i\n2. j")]
+    [TestCase("   1. i \n2. j")]
+    [TestCase("   1.  i \n2. j")]
+    [TestCase("   1.  i  \n2. j")]
+
+    [TestCase("1. i\n2. j\n")]
+    [TestCase("1.  i\n2. j\n")]
+    [TestCase("1. i \n2. j\n")]
+    [TestCase("1.  i \n2. j\n")]
+    [TestCase("1.  i  \n2. j\n")]
+
+    [TestCase(" 1. i\n2. j\n")]
+    [TestCase(" 1.  i\n2. j\n")]
+    [TestCase(" 1. i \n2. j\n")]
+    [TestCase(" 1.  i \n2. j\n")]
+    [TestCase(" 1.  i  \n2. j\n")]
+
+    [TestCase("  1. i\n2. j\n")]
+    [TestCase("  1.  i\n2. j\n")]
+    [TestCase("  1. i \n2. j\n")]
+    [TestCase("  1.  i \n2. j\n")]
+    [TestCase("  1.  i  \n2. j\n")]
+
+    [TestCase("   1. i\n2. j\n")]
+    [TestCase("   1.  i\n2. j\n")]
+    [TestCase("   1. i \n2. j\n")]
+    [TestCase("   1.  i \n2. j\n")]
+    [TestCase("   1.  i  \n2. j\n")]
+
+    [TestCase("1. i\n2. j\n3. k")]
+    [TestCase("1. i\n2. j\n3. k\n")]
+    public void Test(string value)
     {
-        [TestCase("1. i")]
-        [TestCase("1.  i")]
-        [TestCase("1. i ")]
-        [TestCase("1.  i ")]
-        [TestCase("1.  i  ")]
+        RoundTrip(value);
+    }
 
-        [TestCase(" 1. i")]
-        [TestCase(" 1.  i")]
-        [TestCase(" 1. i ")]
-        [TestCase(" 1.  i ")]
-        [TestCase(" 1.  i  ")]
-
-        [TestCase("  1. i")]
-        [TestCase("  1.  i")]
-        [TestCase("  1. i ")]
-        [TestCase("  1.  i ")]
-        [TestCase("  1.  i  ")]
-
-        [TestCase("   1. i")]
-        [TestCase("   1.  i")]
-        [TestCase("   1. i ")]
-        [TestCase("   1.  i ")]
-        [TestCase("   1.  i  ")]
-
-        [TestCase("1. i\n")]
-        [TestCase("1.  i\n")]
-        [TestCase("1. i \n")]
-        [TestCase("1.  i \n")]
-        [TestCase("1.  i  \n")]
-
-        [TestCase(" 1. i\n")]
-        [TestCase(" 1.  i\n")]
-        [TestCase(" 1. i \n")]
-        [TestCase(" 1.  i \n")]
-        [TestCase(" 1.  i  \n")]
-
-        [TestCase("  1. i\n")]
-        [TestCase("  1.  i\n")]
-        [TestCase("  1. i \n")]
-        [TestCase("  1.  i \n")]
-        [TestCase("  1.  i  \n")]
-
-        [TestCase("   1. i\n")]
-        [TestCase("   1.  i\n")]
-        [TestCase("   1. i \n")]
-        [TestCase("   1.  i \n")]
-        [TestCase("   1.  i  \n")]
-
-        [TestCase("1. i\n2. j")]
-        [TestCase("1.  i\n2. j")]
-        [TestCase("1. i \n2. j")]
-        [TestCase("1.  i \n2. j")]
-        [TestCase("1.  i  \n2. j")]
-
-        [TestCase(" 1. i\n2. j")]
-        [TestCase(" 1.  i\n2. j")]
-        [TestCase(" 1. i \n2. j")]
-        [TestCase(" 1.  i \n2. j")]
-        [TestCase(" 1.  i  \n2. j")]
-
-        [TestCase("  1. i\n2. j")]
-        [TestCase("  1.  i\n2. j")]
-        [TestCase("  1. i \n2. j")]
-        [TestCase("  1.  i \n2. j")]
-        [TestCase("  1.  i  \n2. j")]
-
-        [TestCase("   1. i\n2. j")]
-        [TestCase("   1.  i\n2. j")]
-        [TestCase("   1. i \n2. j")]
-        [TestCase("   1.  i \n2. j")]
-        [TestCase("   1.  i  \n2. j")]
-
-        [TestCase("1. i\n2. j\n")]
-        [TestCase("1.  i\n2. j\n")]
-        [TestCase("1. i \n2. j\n")]
-        [TestCase("1.  i \n2. j\n")]
-        [TestCase("1.  i  \n2. j\n")]
-
-        [TestCase(" 1. i\n2. j\n")]
-        [TestCase(" 1.  i\n2. j\n")]
-        [TestCase(" 1. i \n2. j\n")]
-        [TestCase(" 1.  i \n2. j\n")]
-        [TestCase(" 1.  i  \n2. j\n")]
-
-        [TestCase("  1. i\n2. j\n")]
-        [TestCase("  1.  i\n2. j\n")]
-        [TestCase("  1. i \n2. j\n")]
-        [TestCase("  1.  i \n2. j\n")]
-        [TestCase("  1.  i  \n2. j\n")]
-
-        [TestCase("   1. i\n2. j\n")]
-        [TestCase("   1.  i\n2. j\n")]
-        [TestCase("   1. i \n2. j\n")]
-        [TestCase("   1.  i \n2. j\n")]
-        [TestCase("   1.  i  \n2. j\n")]
-
-        [TestCase("1. i\n2. j\n3. k")]
-        [TestCase("1. i\n2. j\n3. k\n")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("10. i")]
-        [TestCase("11. i")]
-        [TestCase("10. i\n12. i")]
-        [TestCase("2. i\n3. i")]
-        public void Test_MoreThenOneStart(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("10. i")]
+    [TestCase("11. i")]
+    [TestCase("10. i\n12. i")]
+    [TestCase("2. i\n3. i")]
+    public void Test_MoreThenOneStart(string value)
+    {
+        RoundTrip(value);
+    }
 
 
-        [TestCase("\n1. i")]
-        [TestCase("\r1. i")]
-        [TestCase("\r\n1. i")]
+    [TestCase("\n1. i")]
+    [TestCase("\r1. i")]
+    [TestCase("\r\n1. i")]
 
-        [TestCase("\n1. i\n")]
-        [TestCase("\r1. i\n")]
-        [TestCase("\r\n1. i\n")]
+    [TestCase("\n1. i\n")]
+    [TestCase("\r1. i\n")]
+    [TestCase("\r\n1. i\n")]
 
-        [TestCase("\n1. i\r")]
-        [TestCase("\r1. i\r")]
-        [TestCase("\r\n1. i\r")]
+    [TestCase("\n1. i\r")]
+    [TestCase("\r1. i\r")]
+    [TestCase("\r\n1. i\r")]
 
-        [TestCase("\n1. i\r\n")]
-        [TestCase("\r1. i\r\n")]
-        [TestCase("\r\n1. i\r\n")]
+    [TestCase("\n1. i\r\n")]
+    [TestCase("\r1. i\r\n")]
+    [TestCase("\r\n1. i\r\n")]
 
-        [TestCase("1. i\n2. i")]
-        [TestCase("\n1. i\n2. i")]
-        [TestCase("\r1. i\n2. i")]
-        [TestCase("\r\n1. i\n2. i")]
+    [TestCase("1. i\n2. i")]
+    [TestCase("\n1. i\n2. i")]
+    [TestCase("\r1. i\n2. i")]
+    [TestCase("\r\n1. i\n2. i")]
 
-        [TestCase("1. i\r2. i")]
-        [TestCase("\n1. i\r2. i")]
-        [TestCase("\r1. i\r2. i")]
-        [TestCase("\r\n1. i\r2. i")]
+    [TestCase("1. i\r2. i")]
+    [TestCase("\n1. i\r2. i")]
+    [TestCase("\r1. i\r2. i")]
+    [TestCase("\r\n1. i\r2. i")]
 
-        [TestCase("1. i\r\n2. i")]
-        [TestCase("\n1. i\r\n2. i")]
-        [TestCase("\r1. i\r\n2. i")]
-        [TestCase("\r\n1. i\r\n2. i")]
+    [TestCase("1. i\r\n2. i")]
+    [TestCase("\n1. i\r\n2. i")]
+    [TestCase("\r1. i\r\n2. i")]
+    [TestCase("\r\n1. i\r\n2. i")]
 
-        [TestCase("1. i\n2. i\n")]
-        [TestCase("\n1. i\n2. i\n")]
-        [TestCase("\r1. i\n2. i\n")]
-        [TestCase("\r\n1. i\n2. i\n")]
+    [TestCase("1. i\n2. i\n")]
+    [TestCase("\n1. i\n2. i\n")]
+    [TestCase("\r1. i\n2. i\n")]
+    [TestCase("\r\n1. i\n2. i\n")]
 
-        [TestCase("1. i\r2. i\r")]
-        [TestCase("\n1. i\r2. i\r")]
-        [TestCase("\r1. i\r2. i\r")]
-        [TestCase("\r\n1. i\r2. i\r")]
+    [TestCase("1. i\r2. i\r")]
+    [TestCase("\n1. i\r2. i\r")]
+    [TestCase("\r1. i\r2. i\r")]
+    [TestCase("\r\n1. i\r2. i\r")]
 
-        [TestCase("1. i\r\n2. i\r\n")]
-        [TestCase("\n1. i\r\n2. i\r\n")]
-        [TestCase("\r1. i\r\n2. i\r\n")]
-        [TestCase("\r\n1. i\r\n2. i\r\n")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("1. i\r\n2. i\r\n")]
+    [TestCase("\n1. i\r\n2. i\r\n")]
+    [TestCase("\r1. i\r\n2. i\r\n")]
+    [TestCase("\r\n1. i\r\n2. i\r\n")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("1. i\n  1. i")]
-        [TestCase("1. i\n  1. i\n")]
-        [TestCase("1. i\n  1. i\n  2. i")]
-        [TestCase("1. i\n  2. i\n  3. i")]
+    [TestCase("1. i\n  1. i")]
+    [TestCase("1. i\n  1. i\n")]
+    [TestCase("1. i\n  1. i\n  2. i")]
+    [TestCase("1. i\n  2. i\n  3. i")]
 
-        [TestCase("1. i\n\t1. i")]
-        [TestCase("1. i\n\t1. i\n2. i")]
-        public void TestMultipleLevels(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("1. i\n\t1. i")]
+    [TestCase("1. i\n\t1. i\n2. i")]
+    public void TestMultipleLevels(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("1.     c")]
-        [TestCase("1.      c")]
-        public void Test_IndentedCodeBlock(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("1.     c")]
+    [TestCase("1.      c")]
+    public void Test_IndentedCodeBlock(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestParagraph.cs

@@ -1,247 +1,245 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestParagraph
 {
-    [TestFixture]
-    public class TestParagraph
+    [TestCase("p")]
+    [TestCase(" p")]
+    [TestCase("p ")]
+    [TestCase(" p ")]
+
+    [TestCase("p\np")]
+    [TestCase(" p\np")]
+    [TestCase("p \np")]
+    [TestCase(" p \np")]
+
+    [TestCase("p\n p")]
+    [TestCase(" p\n p")]
+    [TestCase("p \n p")]
+    [TestCase(" p \n p")]
+
+    [TestCase("p\np ")]
+    [TestCase(" p\np ")]
+    [TestCase("p \np ")]
+    [TestCase(" p \np ")]
+
+    [TestCase("p\n\n p ")]
+    [TestCase(" p\n\n p ")]
+    [TestCase("p \n\n p ")]
+    [TestCase(" p \n\n p ")]
+
+    [TestCase("p\n\np")]
+    [TestCase(" p\n\np")]
+    [TestCase("p \n\np")]
+    [TestCase(" p \n\np")]
+
+    [TestCase("p\n\n p")]
+    [TestCase(" p\n\n p")]
+    [TestCase("p \n\n p")]
+    [TestCase(" p \n\n p")]
+
+    [TestCase("p\n\np ")]
+    [TestCase(" p\n\np ")]
+    [TestCase("p \n\np ")]
+    [TestCase(" p \n\np ")]
+
+    [TestCase("p\n\n p ")]
+    [TestCase(" p\n\n p ")]
+    [TestCase("p \n\n p ")]
+    [TestCase(" p \n\n p ")]
+
+    [TestCase("\np")]
+    [TestCase("\n p")]
+    [TestCase("\np ")]
+    [TestCase("\n p ")]
+
+    [TestCase("\np\np")]
+    [TestCase("\n p\np")]
+    [TestCase("\np \np")]
+    [TestCase("\n p \np")]
+
+    [TestCase("\np\n p")]
+    [TestCase("\n p\n p")]
+    [TestCase("\np \n p")]
+    [TestCase("\n p \n p")]
+
+    [TestCase("\np\np ")]
+    [TestCase("\n p\np ")]
+    [TestCase("\np \np ")]
+    [TestCase("\n p \np ")]
+
+    [TestCase("\np\n\n p ")]
+    [TestCase("\n p\n\n p ")]
+    [TestCase("\np \n\n p ")]
+    [TestCase("\n p \n\n p ")]
+
+    [TestCase("\np\n\np")]
+    [TestCase("\n p\n\np")]
+    [TestCase("\np \n\np")]
+    [TestCase("\n p \n\np")]
+
+    [TestCase("\np\n\n p")]
+    [TestCase("\n p\n\n p")]
+    [TestCase("\np \n\n p")]
+    [TestCase("\n p \n\n p")]
+
+    [TestCase("\np\n\np ")]
+    [TestCase("\n p\n\np ")]
+    [TestCase("\np \n\np ")]
+    [TestCase("\n p \n\np ")]
+
+    [TestCase("\np\n\n p ")]
+    [TestCase("\n p\n\n p ")]
+    [TestCase("\np \n\n p ")]
+    [TestCase("\n p \n\n p ")]
+
+    [TestCase("p  p")]
+    [TestCase("p\tp")]
+    [TestCase("p \tp")]
+    [TestCase("p \t p")]
+    [TestCase("p \tp")]
+
+    // special cases
+    [TestCase(" p \n\n\n\n p \n\n")]
+    [TestCase("\n\np")]
+    [TestCase("p\n")]
+    [TestCase("p\n\n")]
+    [TestCase("p\np\n p")]
+    [TestCase("p\np\n p\n p")]
+    public void Test(string value)
     {
-        [TestCase("p")]
-        [TestCase(" p")]
-        [TestCase("p ")]
-        [TestCase(" p ")]
-
-        [TestCase("p\np")]
-        [TestCase(" p\np")]
-        [TestCase("p \np")]
-        [TestCase(" p \np")]
-
-        [TestCase("p\n p")]
-        [TestCase(" p\n p")]
-        [TestCase("p \n p")]
-        [TestCase(" p \n p")]
-
-        [TestCase("p\np ")]
-        [TestCase(" p\np ")]
-        [TestCase("p \np ")]
-        [TestCase(" p \np ")]
-
-        [TestCase("p\n\n p ")]
-        [TestCase(" p\n\n p ")]
-        [TestCase("p \n\n p ")]
-        [TestCase(" p \n\n p ")]
-
-        [TestCase("p\n\np")]
-        [TestCase(" p\n\np")]
-        [TestCase("p \n\np")]
-        [TestCase(" p \n\np")]
-
-        [TestCase("p\n\n p")]
-        [TestCase(" p\n\n p")]
-        [TestCase("p \n\n p")]
-        [TestCase(" p \n\n p")]
-
-        [TestCase("p\n\np ")]
-        [TestCase(" p\n\np ")]
-        [TestCase("p \n\np ")]
-        [TestCase(" p \n\np ")]
-
-        [TestCase("p\n\n p ")]
-        [TestCase(" p\n\n p ")]
-        [TestCase("p \n\n p ")]
-        [TestCase(" p \n\n p ")]
-
-        [TestCase("\np")]
-        [TestCase("\n p")]
-        [TestCase("\np ")]
-        [TestCase("\n p ")]
-
-        [TestCase("\np\np")]
-        [TestCase("\n p\np")]
-        [TestCase("\np \np")]
-        [TestCase("\n p \np")]
-
-        [TestCase("\np\n p")]
-        [TestCase("\n p\n p")]
-        [TestCase("\np \n p")]
-        [TestCase("\n p \n p")]
-
-        [TestCase("\np\np ")]
-        [TestCase("\n p\np ")]
-        [TestCase("\np \np ")]
-        [TestCase("\n p \np ")]
-
-        [TestCase("\np\n\n p ")]
-        [TestCase("\n p\n\n p ")]
-        [TestCase("\np \n\n p ")]
-        [TestCase("\n p \n\n p ")]
-
-        [TestCase("\np\n\np")]
-        [TestCase("\n p\n\np")]
-        [TestCase("\np \n\np")]
-        [TestCase("\n p \n\np")]
-
-        [TestCase("\np\n\n p")]
-        [TestCase("\n p\n\n p")]
-        [TestCase("\np \n\n p")]
-        [TestCase("\n p \n\n p")]
-
-        [TestCase("\np\n\np ")]
-        [TestCase("\n p\n\np ")]
-        [TestCase("\np \n\np ")]
-        [TestCase("\n p \n\np ")]
-
-        [TestCase("\np\n\n p ")]
-        [TestCase("\n p\n\n p ")]
-        [TestCase("\np \n\n p ")]
-        [TestCase("\n p \n\n p ")]
-
-        [TestCase("p  p")]
-        [TestCase("p\tp")]
-        [TestCase("p \tp")]
-        [TestCase("p \t p")]
-        [TestCase("p \tp")]
-
-        // special cases
-        [TestCase(" p \n\n\n\n p \n\n")]
-        [TestCase("\n\np")]
-        [TestCase("p\n")]
-        [TestCase("p\n\n")]
-        [TestCase("p\np\n p")]
-        [TestCase("p\np\n p\n p")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+        RoundTrip(value);
+    }
 
 
-        [TestCase("\n")]
-        [TestCase("\r\n")]
-        [TestCase("\r")]
+    [TestCase("\n")]
+    [TestCase("\r\n")]
+    [TestCase("\r")]
 
-        [TestCase("p\n")]
-        [TestCase("p\r")]
-        [TestCase("p\r\n")]
+    [TestCase("p\n")]
+    [TestCase("p\r")]
+    [TestCase("p\r\n")]
 
-        [TestCase("p\np")]
-        [TestCase("p\rp")]
-        [TestCase("p\r\np")]
+    [TestCase("p\np")]
+    [TestCase("p\rp")]
+    [TestCase("p\r\np")]
 
-        [TestCase("p\np\n")]
-        [TestCase("p\rp\n")]
-        [TestCase("p\r\np\n")]
+    [TestCase("p\np\n")]
+    [TestCase("p\rp\n")]
+    [TestCase("p\r\np\n")]
 
-        [TestCase("p\np\r")]
-        [TestCase("p\rp\r")]
-        [TestCase("p\r\np\r")]
+    [TestCase("p\np\r")]
+    [TestCase("p\rp\r")]
+    [TestCase("p\r\np\r")]
 
-        [TestCase("p\np\r\n")]
-        [TestCase("p\rp\r\n")]
-        [TestCase("p\r\np\r\n")]
+    [TestCase("p\np\r\n")]
+    [TestCase("p\rp\r\n")]
+    [TestCase("p\r\np\r\n")]
 
-        [TestCase("\np\n")]
-        [TestCase("\np\r")]
-        [TestCase("\np\r\n")]
+    [TestCase("\np\n")]
+    [TestCase("\np\r")]
+    [TestCase("\np\r\n")]
 
-        [TestCase("\np\np")]
-        [TestCase("\np\rp")]
-        [TestCase("\np\r\np")]
+    [TestCase("\np\np")]
+    [TestCase("\np\rp")]
+    [TestCase("\np\r\np")]
 
-        [TestCase("\np\np\n")]
-        [TestCase("\np\rp\n")]
-        [TestCase("\np\r\np\n")]
+    [TestCase("\np\np\n")]
+    [TestCase("\np\rp\n")]
+    [TestCase("\np\r\np\n")]
 
-        [TestCase("\np\np\r")]
-        [TestCase("\np\rp\r")]
-        [TestCase("\np\r\np\r")]
+    [TestCase("\np\np\r")]
+    [TestCase("\np\rp\r")]
+    [TestCase("\np\r\np\r")]
 
-        [TestCase("\np\np\r\n")]
-        [TestCase("\np\rp\r\n")]
-        [TestCase("\np\r\np\r\n")]
+    [TestCase("\np\np\r\n")]
+    [TestCase("\np\rp\r\n")]
+    [TestCase("\np\r\np\r\n")]
 
-        [TestCase("\rp\n")]
-        [TestCase("\rp\r")]
-        [TestCase("\rp\r\n")]
+    [TestCase("\rp\n")]
+    [TestCase("\rp\r")]
+    [TestCase("\rp\r\n")]
 
-        [TestCase("\rp\np")]
-        [TestCase("\rp\rp")]
-        [TestCase("\rp\r\np")]
+    [TestCase("\rp\np")]
+    [TestCase("\rp\rp")]
+    [TestCase("\rp\r\np")]
 
-        [TestCase("\rp\np\n")]
-        [TestCase("\rp\rp\n")]
-        [TestCase("\rp\r\np\n")]
+    [TestCase("\rp\np\n")]
+    [TestCase("\rp\rp\n")]
+    [TestCase("\rp\r\np\n")]
 
-        [TestCase("\rp\np\r")]
-        [TestCase("\rp\rp\r")]
-        [TestCase("\rp\r\np\r")]
+    [TestCase("\rp\np\r")]
+    [TestCase("\rp\rp\r")]
+    [TestCase("\rp\r\np\r")]
 
-        [TestCase("\rp\np\r\n")]
-        [TestCase("\rp\rp\r\n")]
-        [TestCase("\rp\r\np\r\n")]
+    [TestCase("\rp\np\r\n")]
+    [TestCase("\rp\rp\r\n")]
+    [TestCase("\rp\r\np\r\n")]
 
-        [TestCase("\r\np\n")]
-        [TestCase("\r\np\r")]
-        [TestCase("\r\np\r\n")]
+    [TestCase("\r\np\n")]
+    [TestCase("\r\np\r")]
+    [TestCase("\r\np\r\n")]
 
-        [TestCase("\r\np\np")]
-        [TestCase("\r\np\rp")]
-        [TestCase("\r\np\r\np")]
+    [TestCase("\r\np\np")]
+    [TestCase("\r\np\rp")]
+    [TestCase("\r\np\r\np")]
 
-        [TestCase("\r\np\np\n")]
-        [TestCase("\r\np\rp\n")]
-        [TestCase("\r\np\r\np\n")]
+    [TestCase("\r\np\np\n")]
+    [TestCase("\r\np\rp\n")]
+    [TestCase("\r\np\r\np\n")]
 
-        [TestCase("\r\np\np\r")]
-        [TestCase("\r\np\rp\r")]
-        [TestCase("\r\np\r\np\r")]
+    [TestCase("\r\np\np\r")]
+    [TestCase("\r\np\rp\r")]
+    [TestCase("\r\np\r\np\r")]
 
-        [TestCase("\r\np\np\r\n")]
-        [TestCase("\r\np\rp\r\n")]
-        [TestCase("\r\np\r\np\r\n")]
+    [TestCase("\r\np\np\r\n")]
+    [TestCase("\r\np\rp\r\n")]
+    [TestCase("\r\np\r\np\r\n")]
 
-        [TestCase("p\n")]
-        [TestCase("p\n\n")]
-        [TestCase("p\n\n\n")]
-        [TestCase("p\n\n\n\n")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("p\n")]
+    [TestCase("p\n\n")]
+    [TestCase("p\n\n\n")]
+    [TestCase("p\n\n\n\n")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase(" \n")]
-        [TestCase(" \r")]
-        [TestCase(" \r\n")]
+    [TestCase(" \n")]
+    [TestCase(" \r")]
+    [TestCase(" \r\n")]
 
-        [TestCase(" \np")]
-        [TestCase(" \rp")]
-        [TestCase(" \r\np")]
+    [TestCase(" \np")]
+    [TestCase(" \rp")]
+    [TestCase(" \r\np")]
 
-        [TestCase("  \np")]
-        [TestCase("  \rp")]
-        [TestCase("  \r\np")]
+    [TestCase("  \np")]
+    [TestCase("  \rp")]
+    [TestCase("  \r\np")]
 
-        [TestCase("   \np")]
-        [TestCase("   \rp")]
-        [TestCase("   \r\np")]
+    [TestCase("   \np")]
+    [TestCase("   \rp")]
+    [TestCase("   \r\np")]
 
-        [TestCase(" \n ")]
-        [TestCase(" \r ")]
-        [TestCase(" \r\n ")]
+    [TestCase(" \n ")]
+    [TestCase(" \r ")]
+    [TestCase(" \r\n ")]
 
-        [TestCase(" \np ")]
-        [TestCase(" \rp ")]
-        [TestCase(" \r\np ")]
+    [TestCase(" \np ")]
+    [TestCase(" \rp ")]
+    [TestCase(" \r\np ")]
 
-        [TestCase("  \np ")]
-        [TestCase("  \rp ")]
-        [TestCase("  \r\np ")]
+    [TestCase("  \np ")]
+    [TestCase("  \rp ")]
+    [TestCase("  \r\np ")]
 
-        [TestCase("   \np ")]
-        [TestCase("   \rp ")]
-        [TestCase("   \r\np ")]
-        public void Test_WhitespaceWithNewline(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("   \np ")]
+    [TestCase("   \rp ")]
+    [TestCase("   \r\np ")]
+    public void Test_WhitespaceWithNewline(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestQuoteBlock.cs

@@ -1,286 +1,284 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestQuoteBlock
 {
-    [TestFixture]
-    public class TestQuoteBlock
+    [TestCase(">q")]
+    [TestCase(" >q")]
+    [TestCase("  >q")]
+    [TestCase("   >q")]
+    [TestCase("> q")]
+    [TestCase(" > q")]
+    [TestCase("  > q")]
+    [TestCase("   > q")]
+    [TestCase(">  q")]
+    [TestCase(" >  q")]
+    [TestCase("  >  q")]
+    [TestCase("   >  q")]
+
+    [TestCase(">q\n>q")]
+    [TestCase(">q\n >q")]
+    [TestCase(">q\n  >q")]
+    [TestCase(">q\n   >q")]
+    [TestCase(">q\n> q")]
+    [TestCase(">q\n > q")]
+    [TestCase(">q\n  > q")]
+    [TestCase(">q\n   > q")]
+    [TestCase(">q\n>  q")]
+    [TestCase(">q\n >  q")]
+    [TestCase(">q\n  >  q")]
+    [TestCase(">q\n   >  q")]
+
+    [TestCase(" >q\n>q")]
+    [TestCase(" >q\n >q")]
+    [TestCase(" >q\n  >q")]
+    [TestCase(" >q\n   >q")]
+    [TestCase(" >q\n> q")]
+    [TestCase(" >q\n > q")]
+    [TestCase(" >q\n  > q")]
+    [TestCase(" >q\n   > q")]
+    [TestCase(" >q\n>  q")]
+    [TestCase(" >q\n >  q")]
+    [TestCase(" >q\n  >  q")]
+    [TestCase(" >q\n   >  q")]
+
+    [TestCase("  >q\n>q")]
+    [TestCase("  >q\n >q")]
+    [TestCase("  >q\n  >q")]
+    [TestCase("  >q\n   >q")]
+    [TestCase("  >q\n> q")]
+    [TestCase("  >q\n > q")]
+    [TestCase("  >q\n  > q")]
+    [TestCase("  >q\n   > q")]
+    [TestCase("  >q\n>  q")]
+    [TestCase("  >q\n >  q")]
+    [TestCase("  >q\n  >  q")]
+    [TestCase("  >q\n   >  q")]
+
+    [TestCase("> q\n>q")]
+    [TestCase("> q\n >q")]
+    [TestCase("> q\n  >q")]
+    [TestCase("> q\n   >q")]
+    [TestCase("> q\n> q")]
+    [TestCase("> q\n > q")]
+    [TestCase("> q\n  > q")]
+    [TestCase("> q\n   > q")]
+    [TestCase("> q\n>  q")]
+    [TestCase("> q\n >  q")]
+    [TestCase("> q\n  >  q")]
+    [TestCase("> q\n   >  q")]
+
+    [TestCase(" > q\n>q")]
+    [TestCase(" > q\n >q")]
+    [TestCase(" > q\n  >q")]
+    [TestCase(" > q\n   >q")]
+    [TestCase(" > q\n> q")]
+    [TestCase(" > q\n > q")]
+    [TestCase(" > q\n  > q")]
+    [TestCase(" > q\n   > q")]
+    [TestCase(" > q\n>  q")]
+    [TestCase(" > q\n >  q")]
+    [TestCase(" > q\n  >  q")]
+    [TestCase(" > q\n   >  q")]
+
+    [TestCase("  > q\n>q")]
+    [TestCase("  > q\n >q")]
+    [TestCase("  > q\n  >q")]
+    [TestCase("  > q\n   >q")]
+    [TestCase("  > q\n> q")]
+    [TestCase("  > q\n > q")]
+    [TestCase("  > q\n  > q")]
+    [TestCase("  > q\n   > q")]
+    [TestCase("  > q\n>  q")]
+    [TestCase("  > q\n >  q")]
+    [TestCase("  > q\n  >  q")]
+    [TestCase("  > q\n   >  q")]
+
+    [TestCase("   > q\n>q")]
+    [TestCase("   > q\n >q")]
+    [TestCase("   > q\n  >q")]
+    [TestCase("   > q\n   >q")]
+    [TestCase("   > q\n> q")]
+    [TestCase("   > q\n > q")]
+    [TestCase("   > q\n  > q")]
+    [TestCase("   > q\n   > q")]
+    [TestCase("   > q\n>  q")]
+    [TestCase("   > q\n >  q")]
+    [TestCase("   > q\n  >  q")]
+    [TestCase("   > q\n   >  q")]
+
+    [TestCase(">  q\n>q")]
+    [TestCase(">  q\n >q")]
+    [TestCase(">  q\n  >q")]
+    [TestCase(">  q\n   >q")]
+    [TestCase(">  q\n> q")]
+    [TestCase(">  q\n > q")]
+    [TestCase(">  q\n  > q")]
+    [TestCase(">  q\n   > q")]
+    [TestCase(">  q\n>  q")]
+    [TestCase(">  q\n >  q")]
+    [TestCase(">  q\n  >  q")]
+    [TestCase(">  q\n   >  q")]
+
+    [TestCase(" >  q\n>q")]
+    [TestCase(" >  q\n >q")]
+    [TestCase(" >  q\n  >q")]
+    [TestCase(" >  q\n   >q")]
+    [TestCase(" >  q\n> q")]
+    [TestCase(" >  q\n > q")]
+    [TestCase(" >  q\n  > q")]
+    [TestCase(" >  q\n   > q")]
+    [TestCase(" >  q\n>  q")]
+    [TestCase(" >  q\n >  q")]
+    [TestCase(" >  q\n  >  q")]
+    [TestCase(" >  q\n   >  q")]
+
+    [TestCase("  >  q\n>q")]
+    [TestCase("  >  q\n >q")]
+    [TestCase("  >  q\n  >q")]
+    [TestCase("  >  q\n   >q")]
+    [TestCase("  >  q\n> q")]
+    [TestCase("  >  q\n > q")]
+    [TestCase("  >  q\n  > q")]
+    [TestCase("  >  q\n   > q")]
+    [TestCase("  >  q\n>  q")]
+    [TestCase("  >  q\n >  q")]
+    [TestCase("  >  q\n  >  q")]
+    [TestCase("  >  q\n   >  q")]
+
+    [TestCase("   >  q\n>q")]
+    [TestCase("   >  q\n >q")]
+    [TestCase("   >  q\n  >q")]
+    [TestCase("   >  q\n   >q")]
+    [TestCase("   >  q\n> q")]
+    [TestCase("   >  q\n > q")]
+    [TestCase("   >  q\n  > q")]
+    [TestCase("   >  q\n   > q")]
+    [TestCase("   >  q\n>  q")]
+    [TestCase("   >  q\n >  q")]
+    [TestCase("   >  q\n  >  q")]
+    [TestCase("   >  q\n   >  q")]
+
+    [TestCase(">q\n>q\n>q")]
+    [TestCase(">q\n>\n>q")]
+    [TestCase(">q\np\n>q")]
+    [TestCase(">q\n>\n>\n>q")]
+    [TestCase(">q\n>\n>\n>\n>q")]
+    [TestCase(">q\n>\n>q\n>\n>q")]
+    [TestCase("p\n\n> **q**\n>p\n")]
+
+    [TestCase("> q\np\n> q")] // lazy
+    [TestCase("> q\n> q\np")] // lazy
+
+    [TestCase(">>q")]
+    [TestCase(" >  >   q")]
+
+    [TestCase("> **q**\n>p\n")]
+    [TestCase("> **q**")]
+    public void Test(string value)
     {
-        [TestCase(">q")]
-        [TestCase(" >q")]
-        [TestCase("  >q")]
-        [TestCase("   >q")]
-        [TestCase("> q")]
-        [TestCase(" > q")]
-        [TestCase("  > q")]
-        [TestCase("   > q")]
-        [TestCase(">  q")]
-        [TestCase(" >  q")]
-        [TestCase("  >  q")]
-        [TestCase("   >  q")]
+        RoundTrip(value);
+    }
 
-        [TestCase(">q\n>q")]
-        [TestCase(">q\n >q")]
-        [TestCase(">q\n  >q")]
-        [TestCase(">q\n   >q")]
-        [TestCase(">q\n> q")]
-        [TestCase(">q\n > q")]
-        [TestCase(">q\n  > q")]
-        [TestCase(">q\n   > q")]
-        [TestCase(">q\n>  q")]
-        [TestCase(">q\n >  q")]
-        [TestCase(">q\n  >  q")]
-        [TestCase(">q\n   >  q")]
+    [TestCase(">     q")] // 5
+    [TestCase(">      q")] // 6
+    [TestCase(" >     q")] //5
+    [TestCase(" >      q")] //6
+    [TestCase(" > \tq")]
+    [TestCase(">     q\n>     q")] // 5, 5
+    [TestCase(">     q\n>      q")] // 5, 6
+    [TestCase(">      q\n>     q")] // 6, 5
+    [TestCase(">      q\n>      q")] // 6, 6
+    [TestCase(">     q\n\n>     5")] // 5, 5
+    public void TestIndentedCodeBlock(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase(" >q\n>q")]
-        [TestCase(" >q\n >q")]
-        [TestCase(" >q\n  >q")]
-        [TestCase(" >q\n   >q")]
-        [TestCase(" >q\n> q")]
-        [TestCase(" >q\n > q")]
-        [TestCase(" >q\n  > q")]
-        [TestCase(" >q\n   > q")]
-        [TestCase(" >q\n>  q")]
-        [TestCase(" >q\n >  q")]
-        [TestCase(" >q\n  >  q")]
-        [TestCase(" >q\n   >  q")]
+    [TestCase("\n> q")]
+    [TestCase("\n> q\n")]
+    [TestCase("\n> q\n\n")]
+    [TestCase("> q\n\np")]
+    [TestCase("p\n\n> q\n\n# h")]
 
-        [TestCase("  >q\n>q")]
-        [TestCase("  >q\n >q")]
-        [TestCase("  >q\n  >q")]
-        [TestCase("  >q\n   >q")]
-        [TestCase("  >q\n> q")]
-        [TestCase("  >q\n > q")]
-        [TestCase("  >q\n  > q")]
-        [TestCase("  >q\n   > q")]
-        [TestCase("  >q\n>  q")]
-        [TestCase("  >q\n >  q")]
-        [TestCase("  >q\n  >  q")]
-        [TestCase("  >q\n   >  q")]
+    //https://github.com/lunet-io/markdig/issues/480
+    //[TestCase(">\np")]
+    //[TestCase(">**b**\n>\n>p\n>\np\n")]
+    public void TestParagraph(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("> q\n>q")]
-        [TestCase("> q\n >q")]
-        [TestCase("> q\n  >q")]
-        [TestCase("> q\n   >q")]
-        [TestCase("> q\n> q")]
-        [TestCase("> q\n > q")]
-        [TestCase("> q\n  > q")]
-        [TestCase("> q\n   > q")]
-        [TestCase("> q\n>  q")]
-        [TestCase("> q\n >  q")]
-        [TestCase("> q\n  >  q")]
-        [TestCase("> q\n   >  q")]
+    [TestCase("> q\n\n# h\n")]
+    public void TestAtxHeader(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase(" > q\n>q")]
-        [TestCase(" > q\n >q")]
-        [TestCase(" > q\n  >q")]
-        [TestCase(" > q\n   >q")]
-        [TestCase(" > q\n> q")]
-        [TestCase(" > q\n > q")]
-        [TestCase(" > q\n  > q")]
-        [TestCase(" > q\n   > q")]
-        [TestCase(" > q\n>  q")]
-        [TestCase(" > q\n >  q")]
-        [TestCase(" > q\n  >  q")]
-        [TestCase(" > q\n   >  q")]
+    [TestCase(">- i")]
+    [TestCase("> - i")]
+    [TestCase(">- i\n>- i")]
+    [TestCase(">- >p")]
+    [TestCase("> - >p")]
+    [TestCase(">- i1\n>- i2\n")]
+    [TestCase("> **p** p\n>- i1\n>- i2\n")]
+    public void TestUnorderedList(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("  > q\n>q")]
-        [TestCase("  > q\n >q")]
-        [TestCase("  > q\n  >q")]
-        [TestCase("  > q\n   >q")]
-        [TestCase("  > q\n> q")]
-        [TestCase("  > q\n > q")]
-        [TestCase("  > q\n  > q")]
-        [TestCase("  > q\n   > q")]
-        [TestCase("  > q\n>  q")]
-        [TestCase("  > q\n >  q")]
-        [TestCase("  > q\n  >  q")]
-        [TestCase("  > q\n   >  q")]
+    [TestCase("> *q*\n>p\n")]
+    [TestCase("> *q*")]
+    public void TestEmphasis(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("   > q\n>q")]
-        [TestCase("   > q\n >q")]
-        [TestCase("   > q\n  >q")]
-        [TestCase("   > q\n   >q")]
-        [TestCase("   > q\n> q")]
-        [TestCase("   > q\n > q")]
-        [TestCase("   > q\n  > q")]
-        [TestCase("   > q\n   > q")]
-        [TestCase("   > q\n>  q")]
-        [TestCase("   > q\n >  q")]
-        [TestCase("   > q\n  >  q")]
-        [TestCase("   > q\n   >  q")]
+    [TestCase("> **q**\n>p\n")]
+    [TestCase("> **q**")]
+    public void TestStrongEmphasis(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase(">  q\n>q")]
-        [TestCase(">  q\n >q")]
-        [TestCase(">  q\n  >q")]
-        [TestCase(">  q\n   >q")]
-        [TestCase(">  q\n> q")]
-        [TestCase(">  q\n > q")]
-        [TestCase(">  q\n  > q")]
-        [TestCase(">  q\n   > q")]
-        [TestCase(">  q\n>  q")]
-        [TestCase(">  q\n >  q")]
-        [TestCase(">  q\n  >  q")]
-        [TestCase(">  q\n   >  q")]
+    [TestCase(">p\n")]
+    [TestCase(">p\r")]
+    [TestCase(">p\r\n")]
 
-        [TestCase(" >  q\n>q")]
-        [TestCase(" >  q\n >q")]
-        [TestCase(" >  q\n  >q")]
-        [TestCase(" >  q\n   >q")]
-        [TestCase(" >  q\n> q")]
-        [TestCase(" >  q\n > q")]
-        [TestCase(" >  q\n  > q")]
-        [TestCase(" >  q\n   > q")]
-        [TestCase(" >  q\n>  q")]
-        [TestCase(" >  q\n >  q")]
-        [TestCase(" >  q\n  >  q")]
-        [TestCase(" >  q\n   >  q")]
+    [TestCase(">p\n>p")]
+    [TestCase(">p\r>p")]
+    [TestCase(">p\r\n>p")]
 
-        [TestCase("  >  q\n>q")]
-        [TestCase("  >  q\n >q")]
-        [TestCase("  >  q\n  >q")]
-        [TestCase("  >  q\n   >q")]
-        [TestCase("  >  q\n> q")]
-        [TestCase("  >  q\n > q")]
-        [TestCase("  >  q\n  > q")]
-        [TestCase("  >  q\n   > q")]
-        [TestCase("  >  q\n>  q")]
-        [TestCase("  >  q\n >  q")]
-        [TestCase("  >  q\n  >  q")]
-        [TestCase("  >  q\n   >  q")]
+    [TestCase(">p\n>p\n")]
+    [TestCase(">p\r>p\n")]
+    [TestCase(">p\r\n>p\n")]
 
-        [TestCase("   >  q\n>q")]
-        [TestCase("   >  q\n >q")]
-        [TestCase("   >  q\n  >q")]
-        [TestCase("   >  q\n   >q")]
-        [TestCase("   >  q\n> q")]
-        [TestCase("   >  q\n > q")]
-        [TestCase("   >  q\n  > q")]
-        [TestCase("   >  q\n   > q")]
-        [TestCase("   >  q\n>  q")]
-        [TestCase("   >  q\n >  q")]
-        [TestCase("   >  q\n  >  q")]
-        [TestCase("   >  q\n   >  q")]
+    [TestCase(">p\n>p\r")]
+    [TestCase(">p\r>p\r")]
+    [TestCase(">p\r\n>p\r")]
 
-        [TestCase(">q\n>q\n>q")]
-        [TestCase(">q\n>\n>q")]
-        [TestCase(">q\np\n>q")]
-        [TestCase(">q\n>\n>\n>q")]
-        [TestCase(">q\n>\n>\n>\n>q")]
-        [TestCase(">q\n>\n>q\n>\n>q")]
-        [TestCase("p\n\n> **q**\n>p\n")]
+    [TestCase(">p\n>p\r\n")]
+    [TestCase(">p\r>p\r\n")]
+    [TestCase(">p\r\n>p\r\n")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("> q\np\n> q")] // lazy
-        [TestCase("> q\n> q\np")] // lazy
-
-        [TestCase(">>q")]
-        [TestCase(" >  >   q")]
-
-        [TestCase("> **q**\n>p\n")]
-        [TestCase("> **q**")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase(">     q")] // 5
-        [TestCase(">      q")] // 6
-        [TestCase(" >     q")] //5
-        [TestCase(" >      q")] //6
-        [TestCase(" > \tq")]
-        [TestCase(">     q\n>     q")] // 5, 5
-        [TestCase(">     q\n>      q")] // 5, 6
-        [TestCase(">      q\n>     q")] // 6, 5
-        [TestCase(">      q\n>      q")] // 6, 6
-        [TestCase(">     q\n\n>     5")] // 5, 5
-        public void TestIndentedCodeBlock(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("\n> q")]
-        [TestCase("\n> q\n")]
-        [TestCase("\n> q\n\n")]
-        [TestCase("> q\n\np")]
-        [TestCase("p\n\n> q\n\n# h")]
-
-        //https://github.com/lunet-io/markdig/issues/480
-        //[TestCase(">\np")]
-        //[TestCase(">**b**\n>\n>p\n>\np\n")]
-        public void TestParagraph(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("> q\n\n# h\n")]
-        public void TestAtxHeader(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase(">- i")]
-        [TestCase("> - i")]
-        [TestCase(">- i\n>- i")]
-        [TestCase(">- >p")]
-        [TestCase("> - >p")]
-        [TestCase(">- i1\n>- i2\n")]
-        [TestCase("> **p** p\n>- i1\n>- i2\n")]
-        public void TestUnorderedList(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("> *q*\n>p\n")]
-        [TestCase("> *q*")]
-        public void TestEmphasis(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase("> **q**\n>p\n")]
-        [TestCase("> **q**")]
-        public void TestStrongEmphasis(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase(">p\n")]
-        [TestCase(">p\r")]
-        [TestCase(">p\r\n")]
-
-        [TestCase(">p\n>p")]
-        [TestCase(">p\r>p")]
-        [TestCase(">p\r\n>p")]
-
-        [TestCase(">p\n>p\n")]
-        [TestCase(">p\r>p\n")]
-        [TestCase(">p\r\n>p\n")]
-
-        [TestCase(">p\n>p\r")]
-        [TestCase(">p\r>p\r")]
-        [TestCase(">p\r\n>p\r")]
-
-        [TestCase(">p\n>p\r\n")]
-        [TestCase(">p\r>p\r\n")]
-        [TestCase(">p\r\n>p\r\n")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
-
-        [TestCase(">\n>q")]
-        [TestCase(">\n>\n>q")]
-        [TestCase(">q\n>\n>q")]
-        [TestCase(">q\n>\n>\n>q")]
-        [TestCase(">q\n> \n>q")]
-        [TestCase(">q\n>  \n>q")]
-        [TestCase(">q\n>   \n>q")]
-        [TestCase(">q\n>\t\n>q")]
-        [TestCase(">q\n>\v\n>q")]
-        [TestCase(">q\n>\f\n>q")]
-        public void TestEmptyLines(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase(">\n>q")]
+    [TestCase(">\n>\n>q")]
+    [TestCase(">q\n>\n>q")]
+    [TestCase(">q\n>\n>\n>q")]
+    [TestCase(">q\n> \n>q")]
+    [TestCase(">q\n>  \n>q")]
+    [TestCase(">q\n>   \n>q")]
+    [TestCase(">q\n>\t\n>q")]
+    [TestCase(">q\n>\v\n>q")]
+    [TestCase(">q\n>\f\n>q")]
+    public void TestEmptyLines(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestSetextHeading.cs

@@ -1,53 +1,51 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestSetextHeading
 {
-    [TestFixture]
-    public class TestSetextHeading
+    [TestCase("h1\n===")] //3
+    [TestCase("h1\n ===")] //3
+    [TestCase("h1\n  ===")] //3
+    [TestCase("h1\n   ===")] //3
+    [TestCase("h1\n=== ")] //3
+    [TestCase("h1 \n===")] //3
+    [TestCase("h1\\\n===")] //3
+    [TestCase("h1\n === ")] //3
+    [TestCase("h1\nh1 l2\n===")] //3
+    [TestCase("h1\n====")] // 4
+    [TestCase("h1\n ====")] // 4
+    [TestCase("h1\n==== ")] // 4
+    [TestCase("h1\n ==== ")] // 4
+    [TestCase("h1\n===\nh1\n===")] //3
+    [TestCase("\\>h1\n===")] //3
+    public void Test(string value)
     {
-        [TestCase("h1\n===")] //3
-        [TestCase("h1\n ===")] //3
-        [TestCase("h1\n  ===")] //3
-        [TestCase("h1\n   ===")] //3
-        [TestCase("h1\n=== ")] //3
-        [TestCase("h1 \n===")] //3
-        [TestCase("h1\\\n===")] //3
-        [TestCase("h1\n === ")] //3
-        [TestCase("h1\nh1 l2\n===")] //3
-        [TestCase("h1\n====")] // 4
-        [TestCase("h1\n ====")] // 4
-        [TestCase("h1\n==== ")] // 4
-        [TestCase("h1\n ==== ")] // 4
-        [TestCase("h1\n===\nh1\n===")] //3
-        [TestCase("\\>h1\n===")] //3
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+        RoundTrip(value);
+    }
 
-        [TestCase("h1\r===")]
-        [TestCase("h1\n===")]
-        [TestCase("h1\r\n===")]
+    [TestCase("h1\r===")]
+    [TestCase("h1\n===")]
+    [TestCase("h1\r\n===")]
 
-        [TestCase("h1\r===\r")]
-        [TestCase("h1\n===\r")]
-        [TestCase("h1\r\n===\r")]
+    [TestCase("h1\r===\r")]
+    [TestCase("h1\n===\r")]
+    [TestCase("h1\r\n===\r")]
 
-        [TestCase("h1\r===\n")]
-        [TestCase("h1\n===\n")]
-        [TestCase("h1\r\n===\n")]
+    [TestCase("h1\r===\n")]
+    [TestCase("h1\n===\n")]
+    [TestCase("h1\r\n===\n")]
 
-        [TestCase("h1\r===\r\n")]
-        [TestCase("h1\n===\r\n")]
-        [TestCase("h1\r\n===\r\n")]
+    [TestCase("h1\r===\r\n")]
+    [TestCase("h1\n===\r\n")]
+    [TestCase("h1\r\n===\r\n")]
 
-        [TestCase("h1\n===\n\n\nh2---\n\n")]
-        [TestCase("h1\r===\r\r\rh2---\r\r")]
-        [TestCase("h1\r\n===\r\n\r\n\r\nh2---\r\n\r\n")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("h1\n===\n\n\nh2---\n\n")]
+    [TestCase("h1\r===\r\r\rh2---\r\r")]
+    [TestCase("h1\r\n===\r\n\r\n\r\nh2---\r\n\r\n")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestThematicBreak.cs

@@ -1,53 +1,51 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestThematicBreak
 {
-    [TestFixture]
-    public class TestThematicBreak
+    [TestCase("---")]
+    [TestCase(" ---")]
+    [TestCase("  ---")]
+    [TestCase("   ---")]
+    [TestCase("--- ")]
+    [TestCase(" --- ")]
+    [TestCase("  --- ")]
+    [TestCase("   --- ")]
+    [TestCase("- - -")]
+    [TestCase(" - - -")]
+    [TestCase(" - - - ")]
+    [TestCase("-- -")]
+    [TestCase("---\n")]
+    [TestCase("---\n\n")]
+    [TestCase("---\np")]
+    [TestCase("---\n\np")]
+    [TestCase("---\n# h")]
+    [TestCase("p\n\n---")]
+    // Note: "p\n---" is parsed as setext heading
+    public void Test(string value)
     {
-        [TestCase("---")]
-        [TestCase(" ---")]
-        [TestCase("  ---")]
-        [TestCase("   ---")]
-        [TestCase("--- ")]
-        [TestCase(" --- ")]
-        [TestCase("  --- ")]
-        [TestCase("   --- ")]
-        [TestCase("- - -")]
-        [TestCase(" - - -")]
-        [TestCase(" - - - ")]
-        [TestCase("-- -")]
-        [TestCase("---\n")]
-        [TestCase("---\n\n")]
-        [TestCase("---\np")]
-        [TestCase("---\n\np")]
-        [TestCase("---\n# h")]
-        [TestCase("p\n\n---")]
-        // Note: "p\n---" is parsed as setext heading
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+        RoundTrip(value);
+    }
 
-        [TestCase("\n---")]
-        [TestCase("\r---")]
-        [TestCase("\r\n---")]
+    [TestCase("\n---")]
+    [TestCase("\r---")]
+    [TestCase("\r\n---")]
 
-        [TestCase("\n---\n")]
-        [TestCase("\r---\n")]
-        [TestCase("\r\n---\n")]
+    [TestCase("\n---\n")]
+    [TestCase("\r---\n")]
+    [TestCase("\r\n---\n")]
 
-        [TestCase("\n---\r")]
-        [TestCase("\r---\r")]
-        [TestCase("\r\n---\r")]
+    [TestCase("\n---\r")]
+    [TestCase("\r---\r")]
+    [TestCase("\r\n---\r")]
 
-        [TestCase("\n---\r\n")]
-        [TestCase("\r---\r\n")]
-        [TestCase("\r\n---\r\n")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("\n---\r\n")]
+    [TestCase("\r---\r\n")]
+    [TestCase("\r\n---\r\n")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestUnorderedList.cs

@@ -1,183 +1,181 @@
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestUnorderedList
 {
-    [TestFixture]
-    public class TestUnorderedList
+    // i = item
+    [TestCase("- i1")]
+    [TestCase("- i1 ")]
+    [TestCase("- i1\n")]
+    [TestCase("- i1\n\n")]
+    [TestCase("- i1\n- i2")]
+    [TestCase("- i1\n    - i2")]
+    [TestCase("- i1\n    - i1.1\n    - i1.2")]
+    [TestCase("- i1 \n- i2 \n")]
+    [TestCase("- i1  \n- i2  \n")]
+    [TestCase(" - i1")]
+    [TestCase("  - i1")]
+    [TestCase("   - i1")]
+    [TestCase("- i1\n\n- i1")]
+    [TestCase("- i1\n\n\n- i1")]
+    [TestCase("- i1\n    - i1.1\n        - i1.1.1\n")]
+
+    [TestCase("-\ti1")]
+    [TestCase("-\ti1\n-\ti2")]
+    [TestCase("-\ti1\n-  i2\n-\ti3")]
+    public void Test(string value)
     {
-        // i = item
-        [TestCase("- i1")]
-        [TestCase("- i1 ")]
-        [TestCase("- i1\n")]
-        [TestCase("- i1\n\n")]
-        [TestCase("- i1\n- i2")]
-        [TestCase("- i1\n    - i2")]
-        [TestCase("- i1\n    - i1.1\n    - i1.2")]
-        [TestCase("- i1 \n- i2 \n")]
-        [TestCase("- i1  \n- i2  \n")]
-        [TestCase(" - i1")]
-        [TestCase("  - i1")]
-        [TestCase("   - i1")]
-        [TestCase("- i1\n\n- i1")]
-        [TestCase("- i1\n\n\n- i1")]
-        [TestCase("- i1\n    - i1.1\n        - i1.1.1\n")]
+        RoundTrip(value);
+    }
 
-        [TestCase("-\ti1")]
-        [TestCase("-\ti1\n-\ti2")]
-        [TestCase("-\ti1\n-  i2\n-\ti3")]
-        public void Test(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("- > q")]
+    [TestCase(" - > q")]
+    [TestCase("  - > q")]
+    [TestCase("   - > q")]
+    [TestCase("-  > q")]
+    [TestCase(" -  > q")]
+    [TestCase("  -  > q")]
+    [TestCase("   -  > q")]
+    [TestCase("-   > q")]
+    [TestCase(" -   > q")]
+    [TestCase("  -   > q")]
+    [TestCase("   -   > q")]
+    [TestCase("-    > q")]
+    [TestCase(" -    > q")]
+    [TestCase("  -    > q")]
+    [TestCase("   -    > q")]
+    [TestCase("   -    > q1\n   -    > q2")]
+    public void TestBlockQuote(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("- > q")]
-        [TestCase(" - > q")]
-        [TestCase("  - > q")]
-        [TestCase("   - > q")]
-        [TestCase("-  > q")]
-        [TestCase(" -  > q")]
-        [TestCase("  -  > q")]
-        [TestCase("   -  > q")]
-        [TestCase("-   > q")]
-        [TestCase(" -   > q")]
-        [TestCase("  -   > q")]
-        [TestCase("   -   > q")]
-        [TestCase("-    > q")]
-        [TestCase(" -    > q")]
-        [TestCase("  -    > q")]
-        [TestCase("   -    > q")]
-        [TestCase("   -    > q1\n   -    > q2")]
-        public void TestBlockQuote(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("-     i1\n\np\n")] // TODO: listblock should render newline, apparently last paragraph of last listitem dont have newline
+    [TestCase("-     i1\n\n\np\n")]
+    [TestCase("- i1\n\np")]
+    [TestCase("- i1\n\np\n")]
+    public void TestParagraph(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("-     i1\n\np\n")] // TODO: listblock should render newline, apparently last paragraph of last listitem dont have newline
-        [TestCase("-     i1\n\n\np\n")]
-        [TestCase("- i1\n\np")]
-        [TestCase("- i1\n\np\n")]
-        public void TestParagraph(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("- i1\n\n---\n")]
+    [TestCase("- i1\n\n\n---\n")]
+    public void TestThematicBreak(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("- i1\n\n---\n")]
-        [TestCase("- i1\n\n\n---\n")]
-        public void TestThematicBreak(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("-     c")] // 5
+    [TestCase("-     c\n      c")] // 5, 6
+    [TestCase(" -     c\n      c")] // 5, 6
+    [TestCase(" -     c\n       c")] // 5, 7
+    [TestCase("-      c\n      c")] // 6, 6
+    [TestCase(" -      c\n      c")] // 6, 6
+    [TestCase(" -      c\n       c")] // 6, 7
+    public void TestIndentedCodeBlock(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("-     c")] // 5
-        [TestCase("-     c\n      c")] // 5, 6
-        [TestCase(" -     c\n      c")] // 5, 6
-        [TestCase(" -     c\n       c")] // 5, 7
-        [TestCase("-      c\n      c")] // 6, 6
-        [TestCase(" -      c\n      c")] // 6, 6
-        [TestCase(" -      c\n       c")] // 6, 7
-        public void TestIndentedCodeBlock(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("- ```a```")]
+    [TestCase("- ```\n  a\n```")]
+    [TestCase("- i1\n    - i1.1\n    ```\n    c\n    ```")]
+    [TestCase("- i1\n    - i1.1\n    ```\nc\n```")]
+    [TestCase("- i1\n    - i1.1\n    ```\nc\n```\n")]
+    public void TestFencedCodeBlock(string value)
+    {
+        RoundTrip(value);
+    }
 
-        [TestCase("- ```a```")]
-        [TestCase("- ```\n  a\n```")]
-        [TestCase("- i1\n    - i1.1\n    ```\n    c\n    ```")]
-        [TestCase("- i1\n    - i1.1\n    ```\nc\n```")]
-        [TestCase("- i1\n    - i1.1\n    ```\nc\n```\n")]
-        public void TestFencedCodeBlock(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("\n- i")]
+    [TestCase("\r- i")]
+    [TestCase("\r\n- i")]
 
-        [TestCase("\n- i")]
-        [TestCase("\r- i")]
-        [TestCase("\r\n- i")]
+    [TestCase("\n- i\n")]
+    [TestCase("\r- i\n")]
+    [TestCase("\r\n- i\n")]
 
-        [TestCase("\n- i\n")]
-        [TestCase("\r- i\n")]
-        [TestCase("\r\n- i\n")]
+    [TestCase("\n- i\r")]
+    [TestCase("\r- i\r")]
+    [TestCase("\r\n- i\r")]
 
-        [TestCase("\n- i\r")]
-        [TestCase("\r- i\r")]
-        [TestCase("\r\n- i\r")]
+    [TestCase("\n- i\r\n")]
+    [TestCase("\r- i\r\n")]
+    [TestCase("\r\n- i\r\n")]
 
-        [TestCase("\n- i\r\n")]
-        [TestCase("\r- i\r\n")]
-        [TestCase("\r\n- i\r\n")]
+    [TestCase("- i\n- j")]
+    [TestCase("- i\r- j")]
+    [TestCase("- i\r\n- j")]
 
-        [TestCase("- i\n- j")]
-        [TestCase("- i\r- j")]
-        [TestCase("- i\r\n- j")]
+    [TestCase("\n- i\n- j")]
+    [TestCase("\n- i\r- j")]
+    [TestCase("\n- i\r\n- j")]
 
-        [TestCase("\n- i\n- j")]
-        [TestCase("\n- i\r- j")]
-        [TestCase("\n- i\r\n- j")]
+    [TestCase("\r- i\n- j")]
+    [TestCase("\r- i\r- j")]
+    [TestCase("\r- i\r\n- j")]
 
-        [TestCase("\r- i\n- j")]
-        [TestCase("\r- i\r- j")]
-        [TestCase("\r- i\r\n- j")]
+    [TestCase("\r\n- i\n- j")]
+    [TestCase("\r\n- i\r- j")]
+    [TestCase("\r\n- i\r\n- j")]
 
-        [TestCase("\r\n- i\n- j")]
-        [TestCase("\r\n- i\r- j")]
-        [TestCase("\r\n- i\r\n- j")]
+    [TestCase("- i\n- j\n")]
+    [TestCase("- i\r- j\n")]
+    [TestCase("- i\r\n- j\n")]
 
-        [TestCase("- i\n- j\n")]
-        [TestCase("- i\r- j\n")]
-        [TestCase("- i\r\n- j\n")]
+    [TestCase("\n- i\n- j\n")]
+    [TestCase("\n- i\r- j\n")]
+    [TestCase("\n- i\r\n- j\n")]
 
-        [TestCase("\n- i\n- j\n")]
-        [TestCase("\n- i\r- j\n")]
-        [TestCase("\n- i\r\n- j\n")]
+    [TestCase("\r- i\n- j\n")]
+    [TestCase("\r- i\r- j\n")]
+    [TestCase("\r- i\r\n- j\n")]
 
-        [TestCase("\r- i\n- j\n")]
-        [TestCase("\r- i\r- j\n")]
-        [TestCase("\r- i\r\n- j\n")]
+    [TestCase("\r\n- i\n- j\n")]
+    [TestCase("\r\n- i\r- j\n")]
+    [TestCase("\r\n- i\r\n- j\n")]
 
-        [TestCase("\r\n- i\n- j\n")]
-        [TestCase("\r\n- i\r- j\n")]
-        [TestCase("\r\n- i\r\n- j\n")]
+    [TestCase("- i\n- j\r")]
+    [TestCase("- i\r- j\r")]
+    [TestCase("- i\r\n- j\r")]
 
-        [TestCase("- i\n- j\r")]
-        [TestCase("- i\r- j\r")]
-        [TestCase("- i\r\n- j\r")]
+    [TestCase("\n- i\n- j\r")]
+    [TestCase("\n- i\r- j\r")]
+    [TestCase("\n- i\r\n- j\r")]
 
-        [TestCase("\n- i\n- j\r")]
-        [TestCase("\n- i\r- j\r")]
-        [TestCase("\n- i\r\n- j\r")]
+    [TestCase("\r- i\n- j\r")]
+    [TestCase("\r- i\r- j\r")]
+    [TestCase("\r- i\r\n- j\r")]
 
-        [TestCase("\r- i\n- j\r")]
-        [TestCase("\r- i\r- j\r")]
-        [TestCase("\r- i\r\n- j\r")]
+    [TestCase("\r\n- i\n- j\r")]
+    [TestCase("\r\n- i\r- j\r")]
+    [TestCase("\r\n- i\r\n- j\r")]
 
-        [TestCase("\r\n- i\n- j\r")]
-        [TestCase("\r\n- i\r- j\r")]
-        [TestCase("\r\n- i\r\n- j\r")]
+    [TestCase("- i\n- j\r\n")]
+    [TestCase("- i\r- j\r\n")]
+    [TestCase("- i\r\n- j\r\n")]
 
-        [TestCase("- i\n- j\r\n")]
-        [TestCase("- i\r- j\r\n")]
-        [TestCase("- i\r\n- j\r\n")]
+    [TestCase("\n- i\n- j\r\n")]
+    [TestCase("\n- i\r- j\r\n")]
+    [TestCase("\n- i\r\n- j\r\n")]
 
-        [TestCase("\n- i\n- j\r\n")]
-        [TestCase("\n- i\r- j\r\n")]
-        [TestCase("\n- i\r\n- j\r\n")]
+    [TestCase("\r- i\n- j\r\n")]
+    [TestCase("\r- i\r- j\r\n")]
+    [TestCase("\r- i\r\n- j\r\n")]
 
-        [TestCase("\r- i\n- j\r\n")]
-        [TestCase("\r- i\r- j\r\n")]
-        [TestCase("\r- i\r\n- j\r\n")]
+    [TestCase("\r\n- i\n- j\r\n")]
+    [TestCase("\r\n- i\r- j\r\n")]
+    [TestCase("\r\n- i\r\n- j\r\n")]
 
-        [TestCase("\r\n- i\n- j\r\n")]
-        [TestCase("\r\n- i\r- j\r\n")]
-        [TestCase("\r\n- i\r\n- j\r\n")]
-
-        [TestCase("- i\n")]
-        [TestCase("- i\n\n")]
-        [TestCase("- i\n\n\n")]
-        [TestCase("- i\n\n\n\n")]
-        public void TestNewline(string value)
-        {
-            RoundTrip(value);
-        }
+    [TestCase("- i\n")]
+    [TestCase("- i\n\n")]
+    [TestCase("- i\n\n\n")]
+    [TestCase("- i\n\n\n\n")]
+    public void TestNewline(string value)
+    {
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/RoundtripSpecs/TestYamlFrontMatterBlock.cs

@@ -1,25 +1,15 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using Markdig.Renderers.Roundtrip;
-using Markdig.Syntax;
-using NUnit.Framework;
 using static Markdig.Tests.TestRoundtrip;
 
-namespace Markdig.Tests.RoundtripSpecs
+namespace Markdig.Tests.RoundtripSpecs;
+
+[TestFixture]
+public class TestYamlFrontMatterBlock
 {
-    [TestFixture]
-    public class TestYamlFrontMatterBlock
+    [TestCase("---\nkey1: value1\nkey2: value2\n---\n\nContent\n")]
+    [TestCase("No front matter")]
+    [TestCase("Looks like front matter but actually is not\n---\nkey1: value1\nkey2: value2\n---")]
+    public void FrontMatterBlockIsPreserved(string value)
     {
-        [TestCase("---\nkey1: value1\nkey2: value2\n---\n\nContent\n")]
-        [TestCase("No front matter")]
-        [TestCase("Looks like front matter but actually is not\n---\nkey1: value1\nkey2: value2\n---")]
-        public void FrontMatterBlockIsPreserved(string value)
-        {
-            RoundTrip(value);
-        }
+        RoundTrip(value);
     }
 }

src/Markdig.Tests/Specs/GridTableSpecs.generated.cs

@@ -17,7 +17,8 @@ namespace Markdig.Tests.Specs.GridTables
         // 
         // ## Grid Table
         // 
-        // A grid table allows to have multiple lines per cells and allows to span cells over multiple columns. The following shows a simple grid table  
+        // A grid table allows having multiple lines per cells and allows spanning cells over multiple columns.
+        // The following shows a simple grid table:
         // 
         // ```
         // +---------+---------+
@@ -38,17 +39,20 @@ namespace Markdig.Tests.Specs.GridTables
         // ```
         // 
         // **Rule #1**
-        // The first line of a grid table must a **row separator**. It must start with the column separator character `+` used to separate columns in a row separator. Each column separator is:
-        //   - starting by optional spaces
-        //   - followed by an optional `:` to specify left align, followed by optional spaces
-        //   - followed by a sequence of at least one `-` character, followed by optional spaces
-        //   - followed by an optional `:` to specify right align (or center align if left align is also defined)
-        //   - ending by optional spaces
+        // The first line of a grid table must be a **row separator**.
+        // It must start with the column separator character `+` used to separate columns in a row separator.
         // 
-        // The first row separator must be followed by a *regular row*. A regular row must start with the character `|` that is starting at the same position than the column separator `+` of the first row separator.
+        // Each column separator:
+        // - starts with optional spaces
+        // - followed by an optional `:` to specify left align, followed by optional spaces
+        // - followed by a sequence of one or more `-` characters, followed by optional spaces
+        // - followed by an optional `:` to specify right align (or center align if left align is also defined)
+        // - ends with optional spaces
         // 
+        // The first row separator must be followed by a *regular row*.
+        // A regular row must start with a `|` character starting at the same position as the column separator `+` of the first row separator.
         // 
-        // The following is a valid row separator 
+        // The following is a valid row separator:
         [Test]
         public void ExtensionsGridTable_Example001()
         {
@@ -74,7 +78,7 @@ namespace Markdig.Tests.Specs.GridTables
             TestParser.TestSpec("+---------+---------+\n| This is | a table |", "<table>\n<col style=\"width:50%\" />\n<col style=\"width:50%\" />\n<tbody>\n<tr>\n<td>This is</td>\n<td>a table</td>\n</tr>\n</tbody>\n</table>", "gridtables|advanced", context: "Example 1\nSection Extensions / Grid Table\n");
         }
 
-        // The following is not a valid row separator 
+        // The following is not a valid row separator:
         [Test]
         public void ExtensionsGridTable_Example002()
         {
@@ -93,7 +97,8 @@ namespace Markdig.Tests.Specs.GridTables
         }
 
         // **Rule #2**
-        // A regular row can continue a previous regular row when column separator `|` are positioned at the same  position than the previous line. If they are positioned at the same location, the column may span over multiple columns:
+        // A regular row can continue a previous regular row when the column separators `|` are positioned at the same position as those of the previous line.
+        // If they are positioned at the same location, the column may span over multiple columns:
         [Test]
         public void ExtensionsGridTable_Example003()
         {
@@ -187,15 +192,13 @@ namespace Markdig.Tests.Specs.GridTables
             TestParser.TestSpec("+---------+---------+\n| This is | a table with a longer text in the second column", "<table>\n<col style=\"width:50%\" />\n<col style=\"width:50%\" />\n<tbody>\n<tr>\n<td>This is</td>\n<td>a table with a longer text in the second column</td>\n</tr>\n</tbody>\n</table>", "gridtables|advanced", context: "Example 5\nSection Extensions / Grid Table\n");
         }
 
-        // The respective width of the columns are calculated from the ratio between the total size of the first table row without counting the `+`: `+----+--------+----+` would be divided between:
+        // The respective widths of the columns are calculated from the ratio between the total size of the first table row without counting the `+`: `+----+--------+----+` would be divided between:
         // 
-        // Total size is : 16 
+        // - `----` → 4 characters
+        // - `--------` → 8 characters
+        // - `----` → 4 characters
         // 
-        // - `----` -> 4
-        // - `--------` -> 8
-        // - `----` -> 4
-        // 
-        // So the width would be 4/16 = 25%, 8/16 = 50%, 4/16 = 25%
+        // The total size is 16 characters, so the widths would be 4/16 = 25%, 8/16 = 50%, and 4/16 = 25%.
         [Test]
         public void ExtensionsGridTable_Example006()
         {
@@ -296,7 +299,7 @@ namespace Markdig.Tests.Specs.GridTables
             TestParser.TestSpec("+---+---+---+\n| AAAAA | B |\n+---+---+ B +\n| D | E | B |\n+ D +---+---+\n| D | CCCCC |\n+---+---+---+", "<table>\n<col style=\"width:33.33%\" />\n<col style=\"width:33.33%\" />\n<col style=\"width:33.33%\" />\n<tbody>\n<tr>\n<td colspan=\"2\">AAAAA</td>\n<td rowspan=\"2\">B\nB\nB</td>\n</tr>\n<tr>\n<td rowspan=\"2\">D\nD\nD</td>\n<td>E</td>\n</tr>\n<tr>\n<td colspan=\"2\">CCCCC</td>\n</tr>\n</tbody>\n</table>", "gridtables|advanced", context: "Example 8\nSection Extensions / Grid Table\n");
         }
 
-        // A grid table may have cells with both colspan and rowspan:
+        // A grid table may have cells with both `colspan` and `rowspan`:
         [Test]
         public void ExtensionsGridTable_Example009()
         {

src/Markdig.Tests/Specs/GridTableSpecs.md

@@ -4,7 +4,8 @@ This section describes the different extensions supported:
 
 ## Grid Table
 
-A grid table allows to have multiple lines per cells and allows to span cells over multiple columns. The following shows a simple grid table  
+A grid table allows having multiple lines per cells and allows spanning cells over multiple columns.
+The following shows a simple grid table:
 
 ```
 +---------+---------+
@@ -25,17 +26,20 @@ A grid table allows to have multiple lines per cells and allows to span cells ov
 ```
 
 **Rule #1**
-The first line of a grid table must a **row separator**. It must start with the column separator character `+` used to separate columns in a row separator. Each column separator is:
-  - starting by optional spaces
-  - followed by an optional `:` to specify left align, followed by optional spaces
-  - followed by a sequence of at least one `-` character, followed by optional spaces
-  - followed by an optional `:` to specify right align (or center align if left align is also defined)
-  - ending by optional spaces
+The first line of a grid table must be a **row separator**.
+It must start with the column separator character `+` used to separate columns in a row separator.
 
-The first row separator must be followed by a *regular row*. A regular row must start with the character `|` that is starting at the same position than the column separator `+` of the first row separator.
+Each column separator:
+- starts with optional spaces
+- followed by an optional `:` to specify left align, followed by optional spaces
+- followed by a sequence of one or more `-` characters, followed by optional spaces
+- followed by an optional `:` to specify right align (or center align if left align is also defined)
+- ends with optional spaces
 
+The first row separator must be followed by a *regular row*.
+A regular row must start with a `|` character starting at the same position as the column separator `+` of the first row separator.
 
-The following is a valid row separator 
+The following is a valid row separator:
 
 ```````````````````````````````` example
 +---------+---------+
@@ -53,8 +57,8 @@ The following is a valid row separator
 </table>
 ````````````````````````````````
 
+The following is not a valid row separator:
 
-The following is not a valid row separator 
 ```````````````````````````````` example
 |-----xxx----+---------+
 | This is    | not a table
@@ -64,7 +68,8 @@ The following is not a valid row separator
 ````````````````````````````````
 
 **Rule #2**
-A regular row can continue a previous regular row when column separator `|` are positioned at the same  position than the previous line. If they are positioned at the same location, the column may span over multiple columns:
+A regular row can continue a previous regular row when the column separators `|` are positioned at the same position as those of the previous line.
+If they are positioned at the same location, the column may span over multiple columns:
 
 ```````````````````````````````` example
 +---------+---------+---------+
@@ -134,15 +139,13 @@ The last column separator `|` may be omitted:
 </table>
 ````````````````````````````````
 
-The respective width of the columns are calculated from the ratio between the total size of the first table row without counting the `+`: `+----+--------+----+` would be divided between:
+The respective widths of the columns are calculated from the ratio between the total size of the first table row without counting the `+`: `+----+--------+----+` would be divided between:
 
-Total size is : 16 
+- `----` → 4 characters
+- `--------` → 8 characters
+- `----` → 4 characters
 
-- `----` -> 4
-- `--------` -> 8
-- `----` -> 4
-
-So the width would be 4/16 = 25%, 8/16 = 50%, 4/16 = 25%
+The total size is 16 characters, so the widths would be 4/16 = 25%, 8/16 = 50%, and 4/16 = 25%.
 
 ```````````````````````````````` example
 +----+--------+----+
@@ -165,7 +168,6 @@ So the width would be 4/16 = 25%, 8/16 = 50%, 4/16 = 25%
 
 Alignment might be specified on the first row using the character `:`:
 
-
 ```````````````````````````````` example
 +-----+:---:+-----+
 |  A  |  B  |  C  |
@@ -220,7 +222,7 @@ D</td>
 </table>
 ````````````````````````````````
 
-A grid table may have cells with both colspan and rowspan:
+A grid table may have cells with both `colspan` and `rowspan`:
 
 ```````````````````````````````` example
 +---+---+---+
@@ -276,7 +278,6 @@ A grid table may not have irregularly shaped cells:
 
 An empty `+` on a line should result in a simple empty list output:
 
-
 ```````````````````````````````` example
 +
 .

src/Markdig.Tests/TestCharHelper.cs

@@ -0,0 +1,90 @@
+using System.Globalization;
+
+using Markdig.Helpers;
+
+namespace Markdig.Tests;
+
+public class TestCharHelper
+{
+    // An ASCII punctuation character is
+    // !, ", #, $, %, &, ', (, ), *, +, ,, -, ., / (U+0021–2F),
+    // :, ;, <, =, >, ?, @ (U+003A–0040),
+    // [, \, ], ^, _, ` (U+005B–0060),
+    // {, |, }, or ~ (U+007B–007E).
+    private static readonly HashSet<char> s_asciiPunctuation = new()
+    {
+        '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/',
+        ':', ';', '<', '=', '>', '?', '@',
+        '[', '\\', ']', '^', '_', '`',
+        '{', '|', '}', '~'
+    };
+
+    // A Unicode punctuation character is an ASCII punctuation character or anything in the general Unicode categories
+    // Pc, Pd, Pe, Pf, Pi, Po, or Ps.
+    private static readonly HashSet<UnicodeCategory> s_punctuationCategories = new()
+    {
+        UnicodeCategory.ConnectorPunctuation,
+        UnicodeCategory.DashPunctuation,
+        UnicodeCategory.ClosePunctuation,
+        UnicodeCategory.FinalQuotePunctuation,
+        UnicodeCategory.InitialQuotePunctuation,
+        UnicodeCategory.OtherPunctuation,
+        UnicodeCategory.OpenPunctuation
+    };
+
+    private static bool ExpectedIsPunctuation(char c)
+    {
+        return c <= 127
+            ? s_asciiPunctuation.Contains(c)
+            : s_punctuationCategories.Contains(CharUnicodeInfo.GetUnicodeCategory(c));
+    }
+
+    private static bool ExpectedIsWhitespace(char c)
+    {
+        // A Unicode whitespace character is any code point in the Unicode Zs general category,
+        // or a tab (U+0009), line feed (U+000A), form feed (U+000C), or carriage return (U+000D).
+        return c == '\t' || c == '\n' || c == '\u000C' || c == '\r' ||
+            CharUnicodeInfo.GetUnicodeCategory(c) == UnicodeCategory.SpaceSeparator;
+    }
+
+    [Test]
+    public void IsWhitespace()
+    {
+        for (int i = char.MinValue; i <= char.MaxValue; i++)
+        {
+            char c = (char)i;
+
+            Assert.AreEqual(ExpectedIsWhitespace(c), CharHelper.IsWhitespace(c));
+        }
+    }
+
+    [Test]
+    public void CheckUnicodeCategory()
+    {
+        for (int i = char.MinValue; i <= char.MaxValue; i++)
+        {
+            char c = (char)i;
+
+            bool expectedSpace = c == 0 || ExpectedIsWhitespace(c);
+            bool expectedPunctuation = c == 0 || ExpectedIsPunctuation(c);
+
+            CharHelper.CheckUnicodeCategory(c, out bool spaceActual, out bool punctuationActual);
+
+            Assert.AreEqual(expectedSpace, spaceActual);
+            Assert.AreEqual(expectedPunctuation, punctuationActual);
+        }
+    }
+
+    [Test]
+    public void IsSpaceOrPunctuation()
+    {
+        for (int i = char.MinValue; i <= char.MaxValue; i++)
+        {
+            char c = (char)i;
+
+            bool expected = c == 0 || ExpectedIsWhitespace(c) || ExpectedIsPunctuation(c);
+
+            Assert.AreEqual(expected, CharHelper.IsSpaceOrPunctuation(c));
+        }
+    }
+}

src/Markdig.Tests/TestConfigureNewLine.cs

@@ -1,42 +1,39 @@
-using NUnit.Framework;
+namespace Markdig.Tests;
 
-namespace Markdig.Tests
+[TestFixture]
+public class TestConfigureNewLine
 {
-    [TestFixture]
-    public class TestConfigureNewLine
+    [Test]
+    [TestCase(/* newLineForWriting: */ "\n",   /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "<p><em>1</em>\n<em>2</em></p>\n")]
+    [TestCase(/* newLineForWriting: */ "\n",   /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "<p><em>1</em>\n<em>2</em></p>\n")]
+    [TestCase(/* newLineForWriting: */ "\r\n", /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "<p><em>1</em>\r\n<em>2</em></p>\r\n")]
+    [TestCase(/* newLineForWriting: */ "\r\n", /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "<p><em>1</em>\r\n<em>2</em></p>\r\n")]
+    [TestCase(/* newLineForWriting: */ "!!!" , /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "<p><em>1</em>!!!<em>2</em></p>!!!")]
+    [TestCase(/* newLineForWriting: */ "!!!" , /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "<p><em>1</em>!!!<em>2</em></p>!!!")]
+    public void TestHtmlOutputWhenConfiguringNewLine(string newLineForWriting, string markdownText, string expected)
     {
-        [Test]
-        [TestCase(/* newLineForWriting: */ "\n",   /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "<p><em>1</em>\n<em>2</em></p>\n")]
-        [TestCase(/* newLineForWriting: */ "\n",   /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "<p><em>1</em>\n<em>2</em></p>\n")]
-        [TestCase(/* newLineForWriting: */ "\r\n", /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "<p><em>1</em>\r\n<em>2</em></p>\r\n")]
-        [TestCase(/* newLineForWriting: */ "\r\n", /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "<p><em>1</em>\r\n<em>2</em></p>\r\n")]
-        [TestCase(/* newLineForWriting: */ "!!!" , /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "<p><em>1</em>!!!<em>2</em></p>!!!")]
-        [TestCase(/* newLineForWriting: */ "!!!" , /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "<p><em>1</em>!!!<em>2</em></p>!!!")]
-        public void TestHtmlOutputWhenConfiguringNewLine(string newLineForWriting, string markdownText, string expected)
-        {
-            var pipeline = new MarkdownPipelineBuilder()
-                .ConfigureNewLine(newLineForWriting)
-                .Build();
+        var pipeline = new MarkdownPipelineBuilder()
+            .ConfigureNewLine(newLineForWriting)
+            .Build();
 
-            var actual = Markdown.ToHtml(markdownText, pipeline);
-            Assert.AreEqual(expected, actual);
-        }
+        var actual = Markdown.ToHtml(markdownText, pipeline);
+        Assert.AreEqual(expected, actual);
+    }
 
-        [Test]
-        [TestCase(/* newLineForWriting: */ "\n",   /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "1\n2\n")]
-        [TestCase(/* newLineForWriting: */ "\n",   /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "1\n2\n")]
-        [TestCase(/* newLineForWriting: */ "\r\n", /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "1\r\n2\r\n")]
-        [TestCase(/* newLineForWriting: */ "\r\n", /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "1\r\n2\r\n")]
-        [TestCase(/* newLineForWriting: */ "!!!", /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "1!!!2!!!")]
-        [TestCase(/* newLineForWriting: */ "!!!", /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "1!!!2!!!")]
-        public void TestPlainOutputWhenConfiguringNewLine(string newLineForWriting, string markdownText, string expected)
-        {
-            var pipeline = new MarkdownPipelineBuilder()
-                .ConfigureNewLine(newLineForWriting)
-                .Build();
+    [Test]
+    [TestCase(/* newLineForWriting: */ "\n",   /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "1\n2\n")]
+    [TestCase(/* newLineForWriting: */ "\n",   /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "1\n2\n")]
+    [TestCase(/* newLineForWriting: */ "\r\n", /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "1\r\n2\r\n")]
+    [TestCase(/* newLineForWriting: */ "\r\n", /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "1\r\n2\r\n")]
+    [TestCase(/* newLineForWriting: */ "!!!", /* markdownText: */ "*1*\n*2*\n",     /* expected: */ "1!!!2!!!")]
+    [TestCase(/* newLineForWriting: */ "!!!", /* markdownText: */ "*1*\r\n*2*\r\n", /* expected: */ "1!!!2!!!")]
+    public void TestPlainOutputWhenConfiguringNewLine(string newLineForWriting, string markdownText, string expected)
+    {
+        var pipeline = new MarkdownPipelineBuilder()
+            .ConfigureNewLine(newLineForWriting)
+            .Build();
 
-            var actual = Markdown.ToPlainText(markdownText, pipeline);
-            Assert.AreEqual(expected, actual);
-        }
+        var actual = Markdown.ToPlainText(markdownText, pipeline);
+        Assert.AreEqual(expected, actual);
     }
 }

src/Markdig.Tests/TestContainerBlocks.cs

@@ -1,189 +1,186 @@
-using System;
 using Markdig.Syntax;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestContainerBlocks
 {
-    public class TestContainerBlocks
+    private class MockContainerBlock : ContainerBlock
     {
-        private class MockContainerBlock : ContainerBlock
+        public MockContainerBlock()
+            : base(null)
         {
-            public MockContainerBlock()
-                : base(null)
-            {
 
-            }
-        }
-
-        [Test]
-        public void CanBeCleared()
-        {
-            ContainerBlock container = new MockContainerBlock();
-            Assert.AreEqual(0, container.Count);
-            Assert.Null(container.LastChild);
-
-            var paragraph = new ParagraphBlock();
-            Assert.Null(paragraph.Parent);
-
-            container.Add(paragraph);
-
-            Assert.AreEqual(1, container.Count);
-            Assert.AreSame(container, paragraph.Parent);
-            Assert.AreSame(paragraph, container.LastChild);
-
-            container.Clear();
-
-            Assert.AreEqual(0, container.Count);
-            Assert.Null(container.LastChild);
-            Assert.Null(paragraph.Parent);
-        }
-
-        [Test]
-        public void CanBeInsertedInto()
-        {
-            ContainerBlock container = new MockContainerBlock();
-
-            var one = new ParagraphBlock();
-            container.Insert(0, one);
-            Assert.AreEqual(1, container.Count);
-            Assert.AreSame(container[0], one);
-            Assert.AreSame(container, one.Parent);
-
-            var two = new ParagraphBlock();
-            container.Insert(1, two);
-            Assert.AreEqual(2, container.Count);
-            Assert.AreSame(container[0], one);
-            Assert.AreSame(container[1], two);
-            Assert.AreSame(container, two.Parent);
-
-            var three = new ParagraphBlock();
-            container.Insert(0, three);
-            Assert.AreEqual(3, container.Count);
-            Assert.AreSame(container[0], three);
-            Assert.AreSame(container[1], one);
-            Assert.AreSame(container[2], two);
-            Assert.AreSame(container, three.Parent);
-
-            Assert.Throws<ArgumentNullException>(() => container.Insert(0, null));
-            Assert.Throws<ArgumentOutOfRangeException>(() => container.Insert(4, new ParagraphBlock()));
-            Assert.Throws<ArgumentOutOfRangeException>(() => container.Insert(-1, new ParagraphBlock()));
-            Assert.Throws<ArgumentException>(() => container.Insert(0, one)); // one already has a parent
-        }
-
-        [Test]
-        public void CanBeSet()
-        {
-            ContainerBlock container = new MockContainerBlock();
-
-            var one = new ParagraphBlock();
-            container.Insert(0, one);
-            Assert.AreEqual(1, container.Count);
-            Assert.AreSame(container[0], one);
-            Assert.AreSame(container, one.Parent);
-
-            var two = new ParagraphBlock();
-            container[0] = two;
-            Assert.AreSame(container, two.Parent);
-            Assert.Null(one.Parent);
-
-            Assert.Throws<ArgumentException>(() => container[0] = two); // two already has a parent
-        }
-
-        [Test]
-        public void Contains()
-        {
-            var container = new MockContainerBlock();
-            var block = new ParagraphBlock();
-
-            Assert.False(container.Contains(block));
-
-            container.Add(block);
-            Assert.True(container.Contains(block));
-
-            container.Add(new ParagraphBlock());
-            Assert.True(container.Contains(block));
-
-            container.Insert(0, new ParagraphBlock());
-            Assert.True(container.Contains(block));
-        }
-
-        [Test]
-        public void Remove()
-        {
-            var container = new MockContainerBlock();
-            var block = new ParagraphBlock();
-
-            Assert.False(container.Remove(block));
-            Assert.AreEqual(0, container.Count);
-            Assert.Throws<ArgumentOutOfRangeException>(() => container.RemoveAt(0));
-            Assert.AreEqual(0, container.Count);
-
-            container.Add(block);
-            Assert.AreEqual(1, container.Count);
-            Assert.True(container.Remove(block));
-            Assert.AreEqual(0, container.Count);
-            Assert.False(container.Remove(block));
-            Assert.AreEqual(0, container.Count);
-
-            container.Add(block);
-            Assert.AreEqual(1, container.Count);
-            container.RemoveAt(0);
-            Assert.AreEqual(0, container.Count);
-            Assert.Throws<ArgumentOutOfRangeException>(() => container.RemoveAt(0));
-            Assert.AreEqual(0, container.Count);
-
-            container.Add(new ParagraphBlock { Column = 1 });
-            container.Add(new ParagraphBlock { Column = 2 });
-            container.Add(new ParagraphBlock { Column = 3 });
-            container.Add(new ParagraphBlock { Column = 4 });
-            Assert.AreEqual(4, container.Count);
-
-            container.RemoveAt(2);
-            Assert.AreEqual(3, container.Count);
-            Assert.AreEqual(4, container[2].Column);
-
-            Assert.True(container.Remove(container[1]));
-            Assert.AreEqual(2, container.Count);
-            Assert.AreEqual(1, container[0].Column);
-            Assert.AreEqual(4, container[1].Column);
-            Assert.Throws<IndexOutOfRangeException>(() => _ = container[2]);
-        }
-
-        [Test]
-        public void CopyTo()
-        {
-            var container = new MockContainerBlock();
-
-            var destination = new Block[4];
-            container.CopyTo(destination, 0);
-            container.CopyTo(destination, 1);
-            container.CopyTo(destination, -1);
-            container.CopyTo(destination, 5);
-            Assert.Null(destination[0]);
-
-            container.Add(new ParagraphBlock());
-            container.CopyTo(destination, 0);
-            Assert.NotNull(destination[0]);
-            Assert.Null(destination[1]);
-            Assert.Null(destination[2]);
-            Assert.Null(destination[3]);
-
-            container.CopyTo(destination, 2);
-            Assert.NotNull(destination[0]);
-            Assert.Null(destination[1]);
-            Assert.NotNull(destination[2]);
-            Assert.Null(destination[3]);
-
-            Array.Clear(destination);
-
-            container.Add(new ParagraphBlock());
-            container.CopyTo(destination, 1);
-            Assert.Null(destination[0]);
-            Assert.NotNull(destination[1]);
-            Assert.NotNull(destination[2]);
-            Assert.Null(destination[3]);
-
-            Assert.Throws<IndexOutOfRangeException>(() => container.CopyTo(destination, 3));
         }
     }
+
+    [Test]
+    public void CanBeCleared()
+    {
+        ContainerBlock container = new MockContainerBlock();
+        Assert.AreEqual(0, container.Count);
+        Assert.Null(container.LastChild);
+
+        var paragraph = new ParagraphBlock();
+        Assert.Null(paragraph.Parent);
+
+        container.Add(paragraph);
+
+        Assert.AreEqual(1, container.Count);
+        Assert.AreSame(container, paragraph.Parent);
+        Assert.AreSame(paragraph, container.LastChild);
+
+        container.Clear();
+
+        Assert.AreEqual(0, container.Count);
+        Assert.Null(container.LastChild);
+        Assert.Null(paragraph.Parent);
+    }
+
+    [Test]
+    public void CanBeInsertedInto()
+    {
+        ContainerBlock container = new MockContainerBlock();
+
+        var one = new ParagraphBlock();
+        container.Insert(0, one);
+        Assert.AreEqual(1, container.Count);
+        Assert.AreSame(container[0], one);
+        Assert.AreSame(container, one.Parent);
+
+        var two = new ParagraphBlock();
+        container.Insert(1, two);
+        Assert.AreEqual(2, container.Count);
+        Assert.AreSame(container[0], one);
+        Assert.AreSame(container[1], two);
+        Assert.AreSame(container, two.Parent);
+
+        var three = new ParagraphBlock();
+        container.Insert(0, three);
+        Assert.AreEqual(3, container.Count);
+        Assert.AreSame(container[0], three);
+        Assert.AreSame(container[1], one);
+        Assert.AreSame(container[2], two);
+        Assert.AreSame(container, three.Parent);
+
+        Assert.Throws<ArgumentNullException>(() => container.Insert(0, null));
+        Assert.Throws<ArgumentOutOfRangeException>(() => container.Insert(4, new ParagraphBlock()));
+        Assert.Throws<ArgumentOutOfRangeException>(() => container.Insert(-1, new ParagraphBlock()));
+        Assert.Throws<ArgumentException>(() => container.Insert(0, one)); // one already has a parent
+    }
+
+    [Test]
+    public void CanBeSet()
+    {
+        ContainerBlock container = new MockContainerBlock();
+
+        var one = new ParagraphBlock();
+        container.Insert(0, one);
+        Assert.AreEqual(1, container.Count);
+        Assert.AreSame(container[0], one);
+        Assert.AreSame(container, one.Parent);
+
+        var two = new ParagraphBlock();
+        container[0] = two;
+        Assert.AreSame(container, two.Parent);
+        Assert.Null(one.Parent);
+
+        Assert.Throws<ArgumentException>(() => container[0] = two); // two already has a parent
+    }
+
+    [Test]
+    public void Contains()
+    {
+        var container = new MockContainerBlock();
+        var block = new ParagraphBlock();
+
+        Assert.False(container.Contains(block));
+
+        container.Add(block);
+        Assert.True(container.Contains(block));
+
+        container.Add(new ParagraphBlock());
+        Assert.True(container.Contains(block));
+
+        container.Insert(0, new ParagraphBlock());
+        Assert.True(container.Contains(block));
+    }
+
+    [Test]
+    public void Remove()
+    {
+        var container = new MockContainerBlock();
+        var block = new ParagraphBlock();
+
+        Assert.False(container.Remove(block));
+        Assert.AreEqual(0, container.Count);
+        Assert.Throws<ArgumentOutOfRangeException>(() => container.RemoveAt(0));
+        Assert.AreEqual(0, container.Count);
+
+        container.Add(block);
+        Assert.AreEqual(1, container.Count);
+        Assert.True(container.Remove(block));
+        Assert.AreEqual(0, container.Count);
+        Assert.False(container.Remove(block));
+        Assert.AreEqual(0, container.Count);
+
+        container.Add(block);
+        Assert.AreEqual(1, container.Count);
+        container.RemoveAt(0);
+        Assert.AreEqual(0, container.Count);
+        Assert.Throws<ArgumentOutOfRangeException>(() => container.RemoveAt(0));
+        Assert.AreEqual(0, container.Count);
+
+        container.Add(new ParagraphBlock { Column = 1 });
+        container.Add(new ParagraphBlock { Column = 2 });
+        container.Add(new ParagraphBlock { Column = 3 });
+        container.Add(new ParagraphBlock { Column = 4 });
+        Assert.AreEqual(4, container.Count);
+
+        container.RemoveAt(2);
+        Assert.AreEqual(3, container.Count);
+        Assert.AreEqual(4, container[2].Column);
+
+        Assert.True(container.Remove(container[1]));
+        Assert.AreEqual(2, container.Count);
+        Assert.AreEqual(1, container[0].Column);
+        Assert.AreEqual(4, container[1].Column);
+        Assert.Throws<IndexOutOfRangeException>(() => _ = container[2]);
+    }
+
+    [Test]
+    public void CopyTo()
+    {
+        var container = new MockContainerBlock();
+
+        var destination = new Block[4];
+        container.CopyTo(destination, 0);
+        container.CopyTo(destination, 1);
+        container.CopyTo(destination, -1);
+        container.CopyTo(destination, 5);
+        Assert.Null(destination[0]);
+
+        container.Add(new ParagraphBlock());
+        container.CopyTo(destination, 0);
+        Assert.NotNull(destination[0]);
+        Assert.Null(destination[1]);
+        Assert.Null(destination[2]);
+        Assert.Null(destination[3]);
+
+        container.CopyTo(destination, 2);
+        Assert.NotNull(destination[0]);
+        Assert.Null(destination[1]);
+        Assert.NotNull(destination[2]);
+        Assert.Null(destination[3]);
+
+        Array.Clear(destination);
+
+        container.Add(new ParagraphBlock());
+        container.CopyTo(destination, 1);
+        Assert.Null(destination[0]);
+        Assert.NotNull(destination[1]);
+        Assert.NotNull(destination[2]);
+        Assert.Null(destination[3]);
+
+        Assert.Throws<IndexOutOfRangeException>(() => container.CopyTo(destination, 3));
+    }
 }

src/Markdig.Tests/TestContainerInlines.cs

@@ -1,41 +1,38 @@
-using System;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestContainerInlines
 {
-    public class TestContainerInlines
+    private class MockLeafBlock : LeafBlock
     {
-        private class MockLeafBlock : LeafBlock
+        public MockLeafBlock()
+            : base(null)
         {
-            public MockLeafBlock()
-                : base(null)
-            {
 
-            }
-        }
-
-        [Test]
-        public void CanBeAddedToLeafBlock()
-        {
-            var leafBlock1 = new MockLeafBlock();
-
-            var one = new ContainerInline();
-            Assert.Null(one.ParentBlock);
-
-            leafBlock1.Inline = one;
-            Assert.AreSame(leafBlock1, one.ParentBlock);
-
-            var two = new ContainerInline();
-            Assert.Null(two.ParentBlock);
-
-            leafBlock1.Inline = two;
-            Assert.AreSame(leafBlock1, two.ParentBlock);
-            Assert.Null(one.ParentBlock);
-
-            var leafBlock2 = new MockLeafBlock();
-            Assert.Throws<ArgumentException>(() => leafBlock2.Inline = two);
         }
     }
+
+    [Test]
+    public void CanBeAddedToLeafBlock()
+    {
+        var leafBlock1 = new MockLeafBlock();
+
+        var one = new ContainerInline();
+        Assert.Null(one.ParentBlock);
+
+        leafBlock1.Inline = one;
+        Assert.AreSame(leafBlock1, one.ParentBlock);
+
+        var two = new ContainerInline();
+        Assert.Null(two.ParentBlock);
+
+        leafBlock1.Inline = two;
+        Assert.AreSame(leafBlock1, two.ParentBlock);
+        Assert.Null(one.ParentBlock);
+
+        var leafBlock2 = new MockLeafBlock();
+        Assert.Throws<ArgumentException>(() => leafBlock2.Inline = two);
+    }
 }

src/Markdig.Tests/TestCustomEmojis.cs

@@ -1,128 +1,124 @@
-using System;
-using System.Collections.Generic;
 using Markdig.Extensions.Emoji;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestCustomEmojis
 {
-    [TestFixture]
-    public class TestCustomEmojis
+    [Test]
+    [TestCase(":smiley:", "<p>♥</p>\n")]
+    [TestCase(":confused:", "<p>:confused:</p>\n")] // default emoji does not work
+    [TestCase(":/", "<p>:/</p>\n")] // default smiley does not work
+    public void TestCustomEmoji(string input, string expected)
     {
-        [Test]
-        [TestCase(":smiley:", "<p>♥</p>\n")]
-        [TestCase(":confused:", "<p>:confused:</p>\n")] // default emoji does not work
-        [TestCase(":/", "<p>:/</p>\n")] // default smiley does not work
-        public void TestCustomEmoji(string input, string expected)
-        {
-            var emojiToUnicode = new Dictionary<string, string>();
-            var smileyToEmoji = new Dictionary<string, string>();
+        var emojiToUnicode = new Dictionary<string, string>();
+        var smileyToEmoji = new Dictionary<string, string>();
 
-            emojiToUnicode[":smiley:"] = "♥";
+        emojiToUnicode[":smiley:"] = "♥";
 
-            var customMapping = new EmojiMapping(emojiToUnicode, smileyToEmoji);
+        var customMapping = new EmojiMapping(emojiToUnicode, smileyToEmoji);
 
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseEmojiAndSmiley(customEmojiMapping: customMapping)
-                .Build();
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseEmojiAndSmiley(customEmojiMapping: customMapping)
+            .Build();
 
-            var actual = Markdown.ToHtml(input, pipeline);
-            Assert.AreEqual(expected, actual);
-        }
+        var actual = Markdown.ToHtml(input, pipeline);
+        Assert.AreEqual(expected, actual);
+    }
 
-        [Test]
-        [TestCase(":testheart:", "<p>♥</p>\n")]
-        [TestCase("hello", "<p>♥</p>\n")]
-        [TestCase(":confused:", "<p>:confused:</p>\n")] // default emoji does not work
-        [TestCase(":/", "<p>:/</p>\n")] // default smiley does not work
-        public void TestCustomSmiley(string input, string expected)
-        {
-            var emojiToUnicode = new Dictionary<string, string>();
-            var smileyToEmoji = new Dictionary<string, string>();
+    [Test]
+    [TestCase(":testheart:", "<p>♥</p>\n")]
+    [TestCase("hello", "<p>♥</p>\n")]
+    [TestCase(":confused:", "<p>:confused:</p>\n")] // default emoji does not work
+    [TestCase(":/", "<p>:/</p>\n")] // default smiley does not work
+    public void TestCustomSmiley(string input, string expected)
+    {
+        var emojiToUnicode = new Dictionary<string, string>();
+        var smileyToEmoji = new Dictionary<string, string>();
 
-            emojiToUnicode[":testheart:"] = "♥";
-            smileyToEmoji["hello"] = ":testheart:";
+        emojiToUnicode[":testheart:"] = "♥";
+        smileyToEmoji["hello"] = ":testheart:";
 
-            var customMapping = new EmojiMapping(emojiToUnicode, smileyToEmoji);
+        var customMapping = new EmojiMapping(emojiToUnicode, smileyToEmoji);
 
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseEmojiAndSmiley(customEmojiMapping: customMapping)
-                .Build();
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseEmojiAndSmiley(customEmojiMapping: customMapping)
+            .Build();
 
-            var actual = Markdown.ToHtml(input, pipeline);
-            Assert.AreEqual(expected, actual);
-        }
+        var actual = Markdown.ToHtml(input, pipeline);
+        Assert.AreEqual(expected, actual);
+    }
 
-        [Test]
-        [TestCase(":smiley:", "<p>♥</p>\n")]
-        [TestCase(":)", "<p>♥</p>\n")]
-        [TestCase(":confused:", "<p>😕</p>\n")] // default emoji still works
-        [TestCase(":/", "<p>😕</p>\n")] // default smiley still works
-        public void TestOverrideDefaultWithCustomEmoji(string input, string expected)
-        {
-            var emojiToUnicode = EmojiMapping.GetDefaultEmojiShortcodeToUnicode();
-            var smileyToEmoji = EmojiMapping.GetDefaultSmileyToEmojiShortcode();
+    [Test]
+    [TestCase(":smiley:", "<p>♥</p>\n")]
+    [TestCase(":)", "<p>♥</p>\n")]
+    [TestCase(":confused:", "<p>😕</p>\n")] // default emoji still works
+    [TestCase(":/", "<p>😕</p>\n")] // default smiley still works
+    public void TestOverrideDefaultWithCustomEmoji(string input, string expected)
+    {
+        var emojiToUnicode = EmojiMapping.GetDefaultEmojiShortcodeToUnicode();
+        var smileyToEmoji = EmojiMapping.GetDefaultSmileyToEmojiShortcode();
 
-            emojiToUnicode[":smiley:"] = "♥";
+        emojiToUnicode[":smiley:"] = "♥";
 
-            var customMapping = new EmojiMapping(emojiToUnicode, smileyToEmoji);
+        var customMapping = new EmojiMapping(emojiToUnicode, smileyToEmoji);
 
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseEmojiAndSmiley(customEmojiMapping: customMapping)
-                .Build();
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseEmojiAndSmiley(customEmojiMapping: customMapping)
+            .Build();
 
-            var actual = Markdown.ToHtml(input, pipeline);
-            Assert.AreEqual(expected, actual);
-        }
+        var actual = Markdown.ToHtml(input, pipeline);
+        Assert.AreEqual(expected, actual);
+    }
 
-        [Test]
-        [TestCase(":testheart:", "<p>♥</p>\n")]
-        [TestCase("hello", "<p>♥</p>\n")]
-        [TestCase(":confused:", "<p>😕</p>\n")] // default emoji still works
-        [TestCase(":/", "<p>😕</p>\n")] // default smiley still works
-        public void TestOverrideDefaultWithCustomSmiley(string input, string expected)
-        {
-            var emojiToUnicode = EmojiMapping.GetDefaultEmojiShortcodeToUnicode();
-            var smileyToEmoji = EmojiMapping.GetDefaultSmileyToEmojiShortcode();
+    [Test]
+    [TestCase(":testheart:", "<p>♥</p>\n")]
+    [TestCase("hello", "<p>♥</p>\n")]
+    [TestCase(":confused:", "<p>😕</p>\n")] // default emoji still works
+    [TestCase(":/", "<p>😕</p>\n")] // default smiley still works
+    public void TestOverrideDefaultWithCustomSmiley(string input, string expected)
+    {
+        var emojiToUnicode = EmojiMapping.GetDefaultEmojiShortcodeToUnicode();
+        var smileyToEmoji = EmojiMapping.GetDefaultSmileyToEmojiShortcode();
 
-            emojiToUnicode[":testheart:"] = "♥";
-            smileyToEmoji["hello"] = ":testheart:";
+        emojiToUnicode[":testheart:"] = "♥";
+        smileyToEmoji["hello"] = ":testheart:";
 
-            var customMapping = new EmojiMapping(emojiToUnicode, smileyToEmoji);
+        var customMapping = new EmojiMapping(emojiToUnicode, smileyToEmoji);
 
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseEmojiAndSmiley(customEmojiMapping: customMapping)
-                .Build();
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseEmojiAndSmiley(customEmojiMapping: customMapping)
+            .Build();
 
-            var actual = Markdown.ToHtml(input, pipeline);
-            Assert.AreEqual(expected, actual);
-        }
+        var actual = Markdown.ToHtml(input, pipeline);
+        Assert.AreEqual(expected, actual);
+    }
 
-        [Test]
-        public void TestCustomEmojiValidation()
-        {
-            var emojiToUnicode = new Dictionary<string, string>();
-            var smileyToEmoji = new Dictionary<string, string>();
+    [Test]
+    public void TestCustomEmojiValidation()
+    {
+        var emojiToUnicode = new Dictionary<string, string>();
+        var smileyToEmoji = new Dictionary<string, string>();
 
-            Assert.Throws<ArgumentNullException>(() => new EmojiMapping(null, smileyToEmoji));
-            Assert.Throws<ArgumentNullException>(() => new EmojiMapping(emojiToUnicode, null));
+        Assert.Throws<ArgumentNullException>(() => new EmojiMapping(null, smileyToEmoji));
+        Assert.Throws<ArgumentNullException>(() => new EmojiMapping(emojiToUnicode, null));
 
-            emojiToUnicode.Add("null-value", null);
-            Assert.Throws<ArgumentException>(() => new EmojiMapping(emojiToUnicode, smileyToEmoji));
-            emojiToUnicode.Clear();
+        emojiToUnicode.Add("null-value", null);
+        Assert.Throws<ArgumentException>(() => new EmojiMapping(emojiToUnicode, smileyToEmoji));
+        emojiToUnicode.Clear();
 
-            smileyToEmoji.Add("null-value", null);
-            Assert.Throws<ArgumentException>(() => new EmojiMapping(emojiToUnicode, smileyToEmoji));
-            smileyToEmoji.Clear();
+        smileyToEmoji.Add("null-value", null);
+        Assert.Throws<ArgumentException>(() => new EmojiMapping(emojiToUnicode, smileyToEmoji));
+        smileyToEmoji.Clear();
 
-            smileyToEmoji.Add("foo", "something-that-does-not-exist-in-emojiToUnicode");
-            Assert.Throws<ArgumentException>(() => new EmojiMapping(emojiToUnicode, smileyToEmoji));
-            smileyToEmoji.Clear();
+        smileyToEmoji.Add("foo", "something-that-does-not-exist-in-emojiToUnicode");
+        Assert.Throws<ArgumentException>(() => new EmojiMapping(emojiToUnicode, smileyToEmoji));
+        smileyToEmoji.Clear();
 
-            emojiToUnicode.Add("a", "aaa");
-            emojiToUnicode.Add("b", "bbb");
-            emojiToUnicode.Add("c", "ccc");
-            smileyToEmoji.Add("a", "c"); // "a" already exists in emojiToUnicode
-            Assert.Throws<ArgumentException>(() => new EmojiMapping(emojiToUnicode, smileyToEmoji));
-        }
+        emojiToUnicode.Add("a", "aaa");
+        emojiToUnicode.Add("b", "bbb");
+        emojiToUnicode.Add("c", "ccc");
+        smileyToEmoji.Add("a", "c"); // "a" already exists in emojiToUnicode
+        Assert.Throws<ArgumentException>(() => new EmojiMapping(emojiToUnicode, smileyToEmoji));
     }
 }

src/Markdig.Tests/TestDescendantsOrder.cs

@@ -1,150 +1,145 @@
-using NUnit.Framework;
-using Markdig.Helpers;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
-using System.Linq;
-using System.Collections.Generic;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestDescendantsOrder
 {
-    [TestFixture]
-    public class TestDescendantsOrder
+    public static void TestSchemas(MarkdownDocument[] specsSyntaxTrees)
     {
-        public static void TestSchemas(MarkdownDocument[] specsSyntaxTrees)
+        foreach (var syntaxTree in specsSyntaxTrees)
         {
-            foreach (var syntaxTree in specsSyntaxTrees)
+            AssertIEnumerablesAreEqual(
+                Descendants_Legacy(syntaxTree),
+                syntaxTree.Descendants());
+
+            AssertIEnumerablesAreEqual(
+                syntaxTree.Descendants().OfType<ParagraphBlock>(),
+                syntaxTree.Descendants<ParagraphBlock>());
+
+            AssertIEnumerablesAreEqual(
+                syntaxTree.Descendants().OfType<ParagraphBlock>(),
+                (syntaxTree as ContainerBlock).Descendants<ParagraphBlock>());
+
+            AssertIEnumerablesAreEqual(
+                syntaxTree.Descendants().OfType<LiteralInline>(),
+                syntaxTree.Descendants<LiteralInline>());
+
+            foreach (LiteralInline literalInline in syntaxTree.Descendants<LiteralInline>())
+            {
+                Assert.AreSame(Array.Empty<ListBlock>(), literalInline.Descendants<ListBlock>());
+                Assert.AreSame(Array.Empty<ParagraphBlock>(), literalInline.Descendants<ParagraphBlock>());
+                Assert.AreSame(Array.Empty<ContainerInline>(), literalInline.Descendants<ContainerInline>());
+            }
+
+            foreach (ContainerInline containerInline in syntaxTree.Descendants<ContainerInline>())
             {
                 AssertIEnumerablesAreEqual(
-                    Descendants_Legacy(syntaxTree),
-                    syntaxTree.Descendants());
+                    containerInline.FindDescendants<LiteralInline>(),
+                    containerInline.Descendants<LiteralInline>());
 
                 AssertIEnumerablesAreEqual(
-                    syntaxTree.Descendants().OfType<ParagraphBlock>(),
-                    syntaxTree.Descendants<ParagraphBlock>());
+                    containerInline.FindDescendants<LiteralInline>(),
+                    (containerInline as MarkdownObject).Descendants<LiteralInline>());
 
-                AssertIEnumerablesAreEqual(
-                    syntaxTree.Descendants().OfType<ParagraphBlock>(),
-                    (syntaxTree as ContainerBlock).Descendants<ParagraphBlock>());
-
-                AssertIEnumerablesAreEqual(
-                    syntaxTree.Descendants().OfType<LiteralInline>(),
-                    syntaxTree.Descendants<LiteralInline>());
-
-                foreach (LiteralInline literalInline in syntaxTree.Descendants<LiteralInline>())
+                if (containerInline.FirstChild is null)
                 {
-                    Assert.AreSame(ArrayHelper.Empty<ListBlock>(), literalInline.Descendants<ListBlock>());
-                    Assert.AreSame(ArrayHelper.Empty<ParagraphBlock>(), literalInline.Descendants<ParagraphBlock>());
-                    Assert.AreSame(ArrayHelper.Empty<ContainerInline>(), literalInline.Descendants<ContainerInline>());
+                    Assert.AreSame(Array.Empty<LiteralInline>(), containerInline.Descendants<LiteralInline>());
+                    Assert.AreSame(Array.Empty<LiteralInline>(), containerInline.FindDescendants<LiteralInline>());
+                    Assert.AreSame(Array.Empty<LiteralInline>(), (containerInline as MarkdownObject).Descendants<LiteralInline>());
                 }
 
-                foreach (ContainerInline containerInline in syntaxTree.Descendants<ContainerInline>())
+                Assert.AreSame(Array.Empty<ListBlock>(), containerInline.Descendants<ListBlock>());
+                Assert.AreSame(Array.Empty<ParagraphBlock>(), containerInline.Descendants<ParagraphBlock>());
+            }
+
+            foreach (ParagraphBlock paragraphBlock in syntaxTree.Descendants<ParagraphBlock>())
+            {
+                AssertIEnumerablesAreEqual(
+                    (paragraphBlock as MarkdownObject).Descendants<LiteralInline>(),
+                    paragraphBlock.Descendants<LiteralInline>());
+
+                Assert.AreSame(Array.Empty<ParagraphBlock>(), paragraphBlock.Descendants<ParagraphBlock>());
+            }
+
+            foreach (ContainerBlock containerBlock in syntaxTree.Descendants<ContainerBlock>())
+            {
+                AssertIEnumerablesAreEqual(
+                    containerBlock.Descendants<LiteralInline>(),
+                    (containerBlock as MarkdownObject).Descendants<LiteralInline>());
+
+                AssertIEnumerablesAreEqual(
+                    containerBlock.Descendants<ParagraphBlock>(),
+                    (containerBlock as MarkdownObject).Descendants<ParagraphBlock>());
+
+                if (containerBlock.Count == 0)
                 {
-                    AssertIEnumerablesAreEqual(
-                        containerInline.FindDescendants<LiteralInline>(),
-                        containerInline.Descendants<LiteralInline>());
+                    Assert.AreSame(Array.Empty<LiteralInline>(), containerBlock.Descendants<LiteralInline>());
+                    Assert.AreSame(Array.Empty<LiteralInline>(), (containerBlock as Block).Descendants<LiteralInline>());
+                    Assert.AreSame(Array.Empty<LiteralInline>(), (containerBlock as MarkdownObject).Descendants<LiteralInline>());
+                }
+            }
+        }
+    }
 
-                    AssertIEnumerablesAreEqual(
-                        containerInline.FindDescendants<LiteralInline>(),
-                        (containerInline as MarkdownObject).Descendants<LiteralInline>());
+    private static void AssertIEnumerablesAreEqual<T>(IEnumerable<T> first, IEnumerable<T> second)
+    {
+        var firstList = new List<T>(first);
+        var secondList = new List<T>(second);
 
-                    if (containerInline.FirstChild is null)
+        Assert.AreEqual(firstList.Count, secondList.Count);
+
+        for (int i = 0; i < firstList.Count; i++)
+        {
+            Assert.AreSame(firstList[i], secondList[i]);
+        }
+    }
+
+    private static IEnumerable<MarkdownObject> Descendants_Legacy(MarkdownObject markdownObject)
+    {
+        // TODO: implement a recursiveless method
+
+        var block = markdownObject as ContainerBlock;
+        if (block != null)
+        {
+            foreach (var subBlock in block)
+            {
+                yield return subBlock;
+
+                foreach (var sub in Descendants_Legacy(subBlock))
+                {
+                    yield return sub;
+                }
+
+                // Visit leaf block that have inlines
+                var leafBlock = subBlock as LeafBlock;
+                if (leafBlock?.Inline != null)
+                {
+                    foreach (var subInline in Descendants_Legacy(leafBlock.Inline))
                     {
-                        Assert.AreSame(ArrayHelper.Empty<LiteralInline>(), containerInline.Descendants<LiteralInline>());
-                        Assert.AreSame(ArrayHelper.Empty<LiteralInline>(), containerInline.FindDescendants<LiteralInline>());
-                        Assert.AreSame(ArrayHelper.Empty<LiteralInline>(), (containerInline as MarkdownObject).Descendants<LiteralInline>());
-                    }
-
-                    Assert.AreSame(ArrayHelper.Empty<ListBlock>(), containerInline.Descendants<ListBlock>());
-                    Assert.AreSame(ArrayHelper.Empty<ParagraphBlock>(), containerInline.Descendants<ParagraphBlock>());
-                }
-
-                foreach (ParagraphBlock paragraphBlock in syntaxTree.Descendants<ParagraphBlock>())
-                {
-                    AssertIEnumerablesAreEqual(
-                        (paragraphBlock as MarkdownObject).Descendants<LiteralInline>(),
-                        paragraphBlock.Descendants<LiteralInline>());
-
-                    Assert.AreSame(ArrayHelper.Empty<ParagraphBlock>(), paragraphBlock.Descendants<ParagraphBlock>());
-                }
-
-                foreach (ContainerBlock containerBlock in syntaxTree.Descendants<ContainerBlock>())
-                {
-                    AssertIEnumerablesAreEqual(
-                        containerBlock.Descendants<LiteralInline>(),
-                        (containerBlock as MarkdownObject).Descendants<LiteralInline>());
-
-                    AssertIEnumerablesAreEqual(
-                        containerBlock.Descendants<ParagraphBlock>(),
-                        (containerBlock as MarkdownObject).Descendants<ParagraphBlock>());
-
-                    if (containerBlock.Count == 0)
-                    {
-                        Assert.AreSame(ArrayHelper.Empty<LiteralInline>(), containerBlock.Descendants<LiteralInline>());
-                        Assert.AreSame(ArrayHelper.Empty<LiteralInline>(), (containerBlock as Block).Descendants<LiteralInline>());
-                        Assert.AreSame(ArrayHelper.Empty<LiteralInline>(), (containerBlock as MarkdownObject).Descendants<LiteralInline>());
+                        yield return subInline;
                     }
                 }
             }
         }
-
-        private static void AssertIEnumerablesAreEqual<T>(IEnumerable<T> first, IEnumerable<T> second)
+        else
         {
-            var firstList = new List<T>(first);
-            var secondList = new List<T>(second);
-
-            Assert.AreEqual(firstList.Count, secondList.Count);
-
-            for (int i = 0; i < firstList.Count; i++)
+            var inline = markdownObject as ContainerInline;
+            if (inline != null)
             {
-                Assert.AreSame(firstList[i], secondList[i]);
-            }
-        }
-
-        private static IEnumerable<MarkdownObject> Descendants_Legacy(MarkdownObject markdownObject)
-        {
-            // TODO: implement a recursiveless method
-
-            var block = markdownObject as ContainerBlock;
-            if (block != null)
-            {
-                foreach (var subBlock in block)
+                var child = inline.FirstChild;
+                while (child != null)
                 {
-                    yield return subBlock;
+                    var next = child.NextSibling;
+                    yield return child;
 
-                    foreach (var sub in Descendants_Legacy(subBlock))
+                    foreach (var sub in Descendants_Legacy(child))
                     {
                         yield return sub;
                     }
 
-                    // Visit leaf block that have inlines
-                    var leafBlock = subBlock as LeafBlock;
-                    if (leafBlock?.Inline != null)
-                    {
-                        foreach (var subInline in Descendants_Legacy(leafBlock.Inline))
-                        {
-                            yield return subInline;
-                        }
-                    }
-                }
-            }
-            else
-            {
-                var inline = markdownObject as ContainerInline;
-                if (inline != null)
-                {
-                    var child = inline.FirstChild;
-                    while (child != null)
-                    {
-                        var next = child.NextSibling;
-                        yield return child;
-
-                        foreach (var sub in Descendants_Legacy(child))
-                        {
-                            yield return sub;
-                        }
-
-                        child = next;
-                    }
+                    child = next;
                 }
             }
         }

src/Markdig.Tests/TestEmphasisExtended.cs

@@ -1,169 +1,166 @@
+using System.Diagnostics;
+
 using Markdig.Parsers.Inlines;
 using Markdig.Renderers;
 using Markdig.Renderers.Html;
 using Markdig.Syntax.Inlines;
-using NUnit.Framework;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestEmphasisExtended
 {
-    [TestFixture]
-    public class TestEmphasisExtended
+    class EmphasisTestExtension : IMarkdownExtension
     {
-        class EmphasisTestExtension : IMarkdownExtension
+        public void Setup(MarkdownPipelineBuilder pipeline)
         {
-            public void Setup(MarkdownPipelineBuilder pipeline)
+            var emphasisParser = pipeline.InlineParsers.Find<EmphasisInlineParser>();
+            Debug.Assert(emphasisParser != null);
+
+            foreach (var emphasis in EmphasisTestDescriptors)
             {
-                var emphasisParser = pipeline.InlineParsers.Find<EmphasisInlineParser>();
-                Debug.Assert(emphasisParser != null);
-
-                foreach (var emphasis in EmphasisTestDescriptors)
-                {
-                    emphasisParser.EmphasisDescriptors.Add(
-                        new EmphasisDescriptor(emphasis.Character, emphasis.Minimum, emphasis.Maximum, true));
-                }
-                emphasisParser.TryCreateEmphasisInlineList.Add((delimiterChar, delimiterCount) =>
-                {
-                    return delimiterChar == '*' || delimiterChar == '_'
-                        ? null
-                        : new CustomEmphasisInline() { DelimiterChar = delimiterChar, DelimiterCount = delimiterCount };
-                });
+                emphasisParser.EmphasisDescriptors.Add(
+                    new EmphasisDescriptor(emphasis.Character, emphasis.Minimum, emphasis.Maximum, true));
             }
-
-            public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+            emphasisParser.TryCreateEmphasisInlineList.Add((delimiterChar, delimiterCount) =>
             {
-                renderer.ObjectRenderers.Insert(0, new EmphasisRenderer());
-            }
-
-            class EmphasisRenderer : HtmlObjectRenderer<CustomEmphasisInline>
-            {
-                protected override void Write(HtmlRenderer renderer, CustomEmphasisInline obj)
-                {
-                    var tag = EmphasisTestDescriptors.First(test => test.Character == obj.DelimiterChar).Tags[obj.DelimiterCount];
-
-                    renderer.Write(tag.OpeningTag);
-                    renderer.WriteChildren(obj);
-                    renderer.Write(tag.ClosingTag);
-                }
-            }
+                return delimiterChar is '*' or '_'
+                    ? null
+                    : new CustomEmphasisInline() { DelimiterChar = delimiterChar, DelimiterCount = delimiterCount };
+            });
         }
-        class Tag
+
+        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
         {
-#pragma warning disable CS0649
-            public int Level;
-#pragma warning restore CS0649
-            public string RawTag;
-            public string OpeningTag;
-            public string ClosingTag;
-
-            public Tag(string tag)
-            {
-                RawTag = tag;
-                OpeningTag = "<" + tag + ">";
-                ClosingTag = "</" + tag + ">";
-            }
-
-            public static implicit operator Tag(string tag)
-                => new Tag(tag);
+            renderer.ObjectRenderers.Insert(0, new EmphasisRenderer());
         }
-        class EmphasisTestDescriptor
-        {
-            public char Character;
-            public int Minimum;
-            public int Maximum;
-            public Dictionary<int, Tag> Tags = new Dictionary<int, Tag>();
 
-            private EmphasisTestDescriptor(char character, int min, int max)
+        class EmphasisRenderer : HtmlObjectRenderer<CustomEmphasisInline>
+        {
+            protected override void Write(HtmlRenderer renderer, CustomEmphasisInline obj)
             {
-                Character = character;
-                Minimum = min;
-                Maximum = max;
-            }
-            public EmphasisTestDescriptor(char character, int min, int max, params Tag[] tags)
-                : this(character, min, max)
-            {
-                Debug.Assert(tags.Length == max - min + 1);
-                foreach (var tag in tags)
-                {
-                    Tags.Add(min++, tag);
-                }
-            }
-            public EmphasisTestDescriptor(char character, int min, int max, string tag)
-                : this(character, min, max, new Tag(tag)) { }
-        }
-        class CustomEmphasisInline : EmphasisInline { }
-        static readonly EmphasisTestDescriptor[] EmphasisTestDescriptors = new[]
-        {
-            //                            Min Max
-            new EmphasisTestDescriptor('"', 1, 1, "quotation"),
-            new EmphasisTestDescriptor(',', 1, 2, "comma", "extra-comma"),
-            new EmphasisTestDescriptor('!', 2, 3, "warning", "error"),
-            new EmphasisTestDescriptor('=', 1, 3, "equal", "really-equal", "congruent"),
-            new EmphasisTestDescriptor('1', 1, 1, "one-only"),
-            new EmphasisTestDescriptor('2', 2, 2, "two-only"),
-            new EmphasisTestDescriptor('3', 3, 3, "three-only"),
-        };
+                var tag = EmphasisTestDescriptors.First(test => test.Character == obj.DelimiterChar).Tags[obj.DelimiterCount];
 
-        static readonly MarkdownPipeline Pipeline = new MarkdownPipelineBuilder().Use<EmphasisTestExtension>().Build();
-
-        [Test]
-        [TestCase("*foo**",         "<em>foo</em>*")]
-        [TestCase("**foo*",         "*<em>foo</em>")]
-        [TestCase("***foo***",      "<em><strong>foo</strong></em>")]
-        [TestCase("**_foo_**",      "<strong><em>foo</em></strong>")]
-        [TestCase("_**foo**_",      "<em><strong>foo</strong></em>")]
-        [TestCase("\"foo\"",        "<quotation>foo</quotation>")]
-        [TestCase("\"\"foo\"\"",    "<quotation><quotation>foo</quotation></quotation>")]
-        [TestCase("\"foo\"\"",      "<quotation>foo</quotation>&quot;")]
-        [TestCase("\"\"foo\"",      "&quot;<quotation>foo</quotation>")]
-        [TestCase(", foo",          ", foo")]
-        [TestCase(", foo,",         ", foo,")]
-        [TestCase(",some, foo,",    "<comma>some</comma> foo,")]
-        [TestCase(",,foo,,",        "<extra-comma>foo</extra-comma>")]
-        [TestCase(",foo,,",         "<comma>foo</comma>,")]
-        [TestCase(",,,foo,,,",      "<comma><extra-comma>foo</extra-comma></comma>")]
-        [TestCase("*foo*&_foo_",     "<em>foo</em>&amp;<em>foo</em>")]
-        [TestCase("!1!",            "!1!")]
-        [TestCase("!!2!!",          "<warning>2</warning>")]
-        [TestCase("!!!3!!!",        "<error>3</error>")]
-        [TestCase("!!!34!!!!",      "<error>34</error>!")]
-        [TestCase("!!!!43!!!",      "!<error>43</error>")]
-        [TestCase("!!!!44!!!!",     "!<error>44!</error>")] // This is a new case - should the second ! be before or after </error>?
-        [TestCase("!!!!!5!!!!!",    "<warning><error>5</error></warning>")]
-        [TestCase("!!!!!!6!!!!!!",  "<error><error>6</error></error>")]
-        [TestCase("!! !mixed!!!",   "!! !mixed!!!")] // can't open the delimiter because of the whitespace
-        [TestCase("=",              "=")]
-        [TestCase("==",             "==")]
-        [TestCase("====",           "====")]
-        [TestCase("=a",             "=a")]
-        [TestCase("=a=",            "<equal>a</equal>")]
-        [TestCase("==a=",           "=<equal>a</equal>")]
-        [TestCase("==a==",          "<really-equal>a</really-equal>")]
-        [TestCase("==a===",         "<really-equal>a</really-equal>=")]
-        [TestCase("===a===",        "<congruent>a</congruent>")]
-        [TestCase("====a====",      "<equal><congruent>a</congruent></equal>")]
-        [TestCase("=====a=====",    "<really-equal><congruent>a</congruent></really-equal>")]
-        [TestCase("1",              "1")]
-        [TestCase("1 1",            "1 1")]
-        [TestCase("1Foo1",          "<one-only>Foo</one-only>")]
-        [TestCase("1121",           "1<one-only>2</one-only>")]
-        [TestCase("22322",          "<two-only>3</two-only>")]
-        [TestCase("2232",           "2232")]
-        [TestCase("333",            "333")]
-        [TestCase("3334333",        "<three-only>4</three-only>")]
-        [TestCase("33334333",       "3<three-only>4</three-only>")]
-        [TestCase("33343333",       "<three-only>4</three-only>3")]
-        [TestCase("122122",         "<one-only>22</one-only>22")]
-        [TestCase("221221",         "<two-only>1</two-only>1")]
-        [TestCase("122foo221",      "<one-only><two-only>foo</two-only></one-only>")]
-        [TestCase("122foo122",      "<one-only>22foo</one-only>22")]
-        [TestCase("!!!!!Attention:!! \"==1+1== 2\",but ===333 and 222===, mod 111!!!",
-            "<error><warning>Attention:</warning> <quotation><really-equal><one-only>+</one-only></really-equal> 2</quotation><comma>but <congruent>333 and 222</congruent></comma> mod 111</error>")]
-        public void TestEmphasis(string markdown, string expectedHtml)
-        {
-            TestParser.TestSpec(markdown, "<p>" + expectedHtml + "</p>", Pipeline);
+                renderer.Write(tag.OpeningTag);
+                renderer.WriteChildren(obj);
+                renderer.Write(tag.ClosingTag);
+            }
         }
     }
+    class Tag
+    {
+#pragma warning disable CS0649
+        public int Level;
+#pragma warning restore CS0649
+        public string RawTag;
+        public string OpeningTag;
+        public string ClosingTag;
+
+        public Tag(string tag)
+        {
+            RawTag = tag;
+            OpeningTag = "<" + tag + ">";
+            ClosingTag = "</" + tag + ">";
+        }
+
+        public static implicit operator Tag(string tag)
+            => new Tag(tag);
+    }
+    class EmphasisTestDescriptor
+    {
+        public char Character;
+        public int Minimum;
+        public int Maximum;
+        public Dictionary<int, Tag> Tags = new Dictionary<int, Tag>();
+
+        private EmphasisTestDescriptor(char character, int min, int max)
+        {
+            Character = character;
+            Minimum = min;
+            Maximum = max;
+        }
+        public EmphasisTestDescriptor(char character, int min, int max, params Tag[] tags)
+            : this(character, min, max)
+        {
+            Debug.Assert(tags.Length == max - min + 1);
+            foreach (var tag in tags)
+            {
+                Tags.Add(min++, tag);
+            }
+        }
+        public EmphasisTestDescriptor(char character, int min, int max, string tag)
+            : this(character, min, max, new Tag(tag)) { }
+    }
+    class CustomEmphasisInline : EmphasisInline { }
+    static readonly EmphasisTestDescriptor[] EmphasisTestDescriptors = new[]
+    {
+        //                            Min Max
+        new EmphasisTestDescriptor('"', 1, 1, "quotation"),
+        new EmphasisTestDescriptor(',', 1, 2, "comma", "extra-comma"),
+        new EmphasisTestDescriptor('!', 2, 3, "warning", "error"),
+        new EmphasisTestDescriptor('=', 1, 3, "equal", "really-equal", "congruent"),
+        new EmphasisTestDescriptor('1', 1, 1, "one-only"),
+        new EmphasisTestDescriptor('2', 2, 2, "two-only"),
+        new EmphasisTestDescriptor('3', 3, 3, "three-only"),
+    };
+
+    static readonly MarkdownPipeline Pipeline = new MarkdownPipelineBuilder().Use<EmphasisTestExtension>().Build();
+
+    [Test]
+    [TestCase("*foo**",         "<em>foo</em>*")]
+    [TestCase("**foo*",         "*<em>foo</em>")]
+    [TestCase("***foo***",      "<em><strong>foo</strong></em>")]
+    [TestCase("**_foo_**",      "<strong><em>foo</em></strong>")]
+    [TestCase("_**foo**_",      "<em><strong>foo</strong></em>")]
+    [TestCase("\"foo\"",        "<quotation>foo</quotation>")]
+    [TestCase("\"\"foo\"\"",    "<quotation><quotation>foo</quotation></quotation>")]
+    [TestCase("\"foo\"\"",      "<quotation>foo</quotation>&quot;")]
+    [TestCase("\"\"foo\"",      "&quot;<quotation>foo</quotation>")]
+    [TestCase(", foo",          ", foo")]
+    [TestCase(", foo,",         ", foo,")]
+    [TestCase(",some, foo,",    "<comma>some</comma> foo,")]
+    [TestCase(",,foo,,",        "<extra-comma>foo</extra-comma>")]
+    [TestCase(",foo,,",         "<comma>foo</comma>,")]
+    [TestCase(",,,foo,,,",      "<comma><extra-comma>foo</extra-comma></comma>")]
+    [TestCase("*foo*&_foo_",     "<em>foo</em>&amp;<em>foo</em>")]
+    [TestCase("!1!",            "!1!")]
+    [TestCase("!!2!!",          "<warning>2</warning>")]
+    [TestCase("!!!3!!!",        "<error>3</error>")]
+    [TestCase("!!!34!!!!",      "<error>34</error>!")]
+    [TestCase("!!!!43!!!",      "!<error>43</error>")]
+    [TestCase("!!!!44!!!!",     "!<error>44!</error>")] // This is a new case - should the second ! be before or after </error>?
+    [TestCase("!!!!!5!!!!!",    "<warning><error>5</error></warning>")]
+    [TestCase("!!!!!!6!!!!!!",  "<error><error>6</error></error>")]
+    [TestCase("!! !mixed!!!",   "!! !mixed!!!")] // can't open the delimiter because of the whitespace
+    [TestCase("=",              "=")]
+    [TestCase("==",             "==")]
+    [TestCase("====",           "====")]
+    [TestCase("=a",             "=a")]
+    [TestCase("=a=",            "<equal>a</equal>")]
+    [TestCase("==a=",           "=<equal>a</equal>")]
+    [TestCase("==a==",          "<really-equal>a</really-equal>")]
+    [TestCase("==a===",         "<really-equal>a</really-equal>=")]
+    [TestCase("===a===",        "<congruent>a</congruent>")]
+    [TestCase("====a====",      "<equal><congruent>a</congruent></equal>")]
+    [TestCase("=====a=====",    "<really-equal><congruent>a</congruent></really-equal>")]
+    [TestCase("1",              "1")]
+    [TestCase("1 1",            "1 1")]
+    [TestCase("1Foo1",          "<one-only>Foo</one-only>")]
+    [TestCase("1121",           "1<one-only>2</one-only>")]
+    [TestCase("22322",          "<two-only>3</two-only>")]
+    [TestCase("2232",           "2232")]
+    [TestCase("333",            "333")]
+    [TestCase("3334333",        "<three-only>4</three-only>")]
+    [TestCase("33334333",       "3<three-only>4</three-only>")]
+    [TestCase("33343333",       "<three-only>4</three-only>3")]
+    [TestCase("122122",         "<one-only>22</one-only>22")]
+    [TestCase("221221",         "<two-only>1</two-only>1")]
+    [TestCase("122foo221",      "<one-only><two-only>foo</two-only></one-only>")]
+    [TestCase("122foo122",      "<one-only>22foo</one-only>22")]
+    [TestCase("!!!!!Attention:!! \"==1+1== 2\",but ===333 and 222===, mod 111!!!",
+        "<error><warning>Attention:</warning> <quotation><really-equal><one-only>+</one-only></really-equal> 2</quotation><comma>but <congruent>333 and 222</congruent></comma> mod 111</error>")]
+    public void TestEmphasis(string markdown, string expectedHtml)
+    {
+        TestParser.TestSpec(markdown, "<p>" + expectedHtml + "</p>", Pipeline);
+    }
 }

src/Markdig.Tests/TestEmphasisExtraOptions.cs

@@ -1,45 +1,43 @@
-using NUnit.Framework;
 using Markdig.Extensions.EmphasisExtras;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestEmphasisExtraOptions
 {
-    [TestFixture]
-    public class TestEmphasisExtraOptions
+    [Test]
+    public void OnlyStrikethrough_Single()
     {
-        [Test]
-        public void OnlyStrikethrough_Single()
-        {
-            TestParser.TestSpec("~foo~", "<p>~foo~</p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Strikethrough).Build());
-        }
+        TestParser.TestSpec("~foo~", "<p>~foo~</p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Strikethrough).Build());
+    }
 
-        [Test]
-        public void OnlyStrikethrough_Double()
-        {
-            TestParser.TestSpec("~~foo~~", "<p><del>foo</del></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Strikethrough).Build());
-        }
+    [Test]
+    public void OnlyStrikethrough_Double()
+    {
+        TestParser.TestSpec("~~foo~~", "<p><del>foo</del></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Strikethrough).Build());
+    }
 
-        [Test]
-        public void OnlySubscript_Single()
-        {
-            TestParser.TestSpec("~foo~", "<p><sub>foo</sub></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build());
-        }
+    [Test]
+    public void OnlySubscript_Single()
+    {
+        TestParser.TestSpec("~foo~", "<p><sub>foo</sub></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build());
+    }
 
-        [Test]
-        public void OnlySubscript_Double()
-        {
-            TestParser.TestSpec("~~foo~~", "<p><sub><sub>foo</sub></sub></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build());
-        }
+    [Test]
+    public void OnlySubscript_Double()
+    {
+        TestParser.TestSpec("~~foo~~", "<p><sub><sub>foo</sub></sub></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build());
+    }
 
-        [Test]
-        public void SubscriptAndStrikethrough_Single()
-        {
-            TestParser.TestSpec("~foo~", "<p><sub>foo</sub></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Strikethrough | EmphasisExtraOptions.Subscript).Build());
-        }
+    [Test]
+    public void SubscriptAndStrikethrough_Single()
+    {
+        TestParser.TestSpec("~foo~", "<p><sub>foo</sub></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Strikethrough | EmphasisExtraOptions.Subscript).Build());
+    }
 
-        [Test]
-        public void SubscriptAndStrikethrough_Double()
-        {
-            TestParser.TestSpec("~~foo~~", "<p><del>foo</del></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Strikethrough | EmphasisExtraOptions.Subscript).Build());
-        }
+    [Test]
+    public void SubscriptAndStrikethrough_Double()
+    {
+        TestParser.TestSpec("~~foo~~", "<p><del>foo</del></p>", new MarkdownPipelineBuilder().UseEmphasisExtras(EmphasisExtraOptions.Strikethrough | EmphasisExtraOptions.Subscript).Build());
     }
 }

src/Markdig.Tests/TestEmphasisPlus.cs

@@ -1,23 +1,37 @@
 // Copyright (c) Alexandre Mutel. All rights reserved.
-// This file is licensed under the BSD-Clause 2 license. 
+// This file is licensed under the BSD-Clause 2 license.
 // See the license.txt file in the project root for more information.
-using NUnit.Framework;
 
-namespace Markdig.Tests
+using Markdig.Syntax;
+using Markdig.Syntax.Inlines;
+
+namespace Markdig.Tests;
+
+[TestFixture]
+public partial class TestEmphasisPlus
 {
-    [TestFixture]
-    public partial class TestEmphasisPlus
+    [Test]
+    public void StrongNormal()
     {
-        [Test]
-        public void StrongNormal()
-        {
-            TestParser.TestSpec("***Strong emphasis*** normal", "<p><em><strong>Strong emphasis</strong></em> normal</p>", "");
-        }
+        TestParser.TestSpec("***Strong emphasis*** normal", "<p><em><strong>Strong emphasis</strong></em> normal</p>", "");
+    }
 
-        [Test]
-        public void NormalStrongNormal()
-        {
-            TestParser.TestSpec("normal ***Strong emphasis*** normal", "<p>normal <em><strong>Strong emphasis</strong></em> normal</p>", "");
-        }
+    [Test]
+    public void NormalStrongNormal()
+    {
+        TestParser.TestSpec("normal ***Strong emphasis*** normal", "<p>normal <em><strong>Strong emphasis</strong></em> normal</p>", "");
+    }
+
+    [Test]
+    public void OpenEmphasisHasConvenientContentStringSlice()
+    {
+        var pipeline = new MarkdownPipelineBuilder().Build();
+
+        var document = Markdown.Parse("test*test", pipeline);
+
+        var emphasisDelimiterLiteral = (LiteralInline)((ParagraphBlock)document.LastChild).Inline.ElementAt(1);
+        Assert.That(emphasisDelimiterLiteral.Content.Text == "test*test");
+        Assert.That(emphasisDelimiterLiteral.Content.Start == 4);
+        Assert.That(emphasisDelimiterLiteral.Content.End == 4);
     }
 }

src/Markdig.Tests/TestExceptionNotThrown.cs

@@ -1,48 +1,45 @@
-using NUnit.Framework;
+namespace Markdig.Tests;
 
-namespace Markdig.Tests
+[TestFixture]
+public class TestExceptionNotThrown
 {
-    [TestFixture]
-    public class TestExceptionNotThrown
+    [Test]
+    public void DoesNotThrowIndexOutOfRangeException1()
     {
-        [Test]
-        public void DoesNotThrowIndexOutOfRangeException1()
+        Assert.DoesNotThrow(() =>
         {
-            Assert.DoesNotThrow(() =>
-            {
-                var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
-                Markdown.ToHtml("+-\n|\n+", pipeline);
-            });
-        }
+            var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
+            Markdown.ToHtml("+-\n|\n+", pipeline);
+        });
+    }
 
-        [Test]
-        public void DoesNotThrowIndexOutOfRangeException2()
+    [Test]
+    public void DoesNotThrowIndexOutOfRangeException2()
+    {
+        Assert.DoesNotThrow(() =>
         {
-            Assert.DoesNotThrow(() =>
-            {
-                var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
-                Markdown.ToHtml("+--\n|\n+0", pipeline);
-            });
-        }
+            var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
+            Markdown.ToHtml("+--\n|\n+0", pipeline);
+        });
+    }
 
-        [Test]
-        public void DoesNotThrowIndexOutOfRangeException3()
+    [Test]
+    public void DoesNotThrowIndexOutOfRangeException3()
+    {
+        Assert.DoesNotThrow(() =>
         {
-            Assert.DoesNotThrow(() =>
-            {
-                var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
-                Markdown.ToHtml("+-\n|\n+\n0", pipeline);
-            });
-        }
+            var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
+            Markdown.ToHtml("+-\n|\n+\n0", pipeline);
+        });
+    }
 
-        [Test]
-        public void DoesNotThrowIndexOutOfRangeException4()
+    [Test]
+    public void DoesNotThrowIndexOutOfRangeException4()
+    {
+        Assert.DoesNotThrow(() =>
         {
-            Assert.DoesNotThrow(() =>
-            {
-                var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
-                Markdown.ToHtml("+-\n|\n+0", pipeline);
-            });
-        }
+            var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
+            Markdown.ToHtml("+-\n|\n+0", pipeline);
+        });
     }
 }

src/Markdig.Tests/TestFastStringWriter.cs

@@ -1,189 +1,186 @@
-using Markdig.Helpers;
-using NUnit.Framework;
-using System;
 using System.Text;
-using System.Threading.Tasks;
 
-namespace Markdig.Tests
+using Markdig.Helpers;
+
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestFastStringWriter
 {
-    [TestFixture]
-    public class TestFastStringWriter
+    private const string NewLineReplacement = "~~NEW_LINE~~";
+
+    private FastStringWriter _writer = new();
+
+    [SetUp]
+    public void Setup()
     {
-        private const string NewLineReplacement = "~~NEW_LINE~~";
-
-        private FastStringWriter _writer = new();
-
-        [SetUp]
-        public void Setup()
+        _writer = new FastStringWriter
         {
-            _writer = new FastStringWriter
-            {
-                NewLine = NewLineReplacement
-            };
-        }
+            NewLine = NewLineReplacement
+        };
+    }
 
-        public void AssertToString(string value)
-        {
-            value = value.Replace("\n", NewLineReplacement);
-            Assert.AreEqual(value, _writer.ToString());
-            Assert.AreEqual(value, _writer.ToString());
-        }
+    public void AssertToString(string value)
+    {
+        value = value.Replace("\n", NewLineReplacement);
+        Assert.AreEqual(value, _writer.ToString());
+        Assert.AreEqual(value, _writer.ToString());
+    }
 
-        [Test]
-        public async Task NewLine()
-        {
-            Assert.AreEqual("\n", new FastStringWriter().NewLine);
+    [Test]
+    public async Task NewLine()
+    {
+        Assert.AreEqual("\n", new FastStringWriter().NewLine);
 
-            _writer.NewLine = "\r";
-            Assert.AreEqual("\r", _writer.NewLine);
+        _writer.NewLine = "\r";
+        Assert.AreEqual("\r", _writer.NewLine);
 
-            _writer.NewLine = "foo";
-            Assert.AreEqual("foo", _writer.NewLine);
+        _writer.NewLine = "foo";
+        Assert.AreEqual("foo", _writer.NewLine);
 
-            _writer.WriteLine();
-            await _writer.WriteLineAsync();
-            _writer.WriteLine("bar");
-            Assert.AreEqual("foofoobarfoo", _writer.ToString());
-        }
+        _writer.WriteLine();
+        await _writer.WriteLineAsync();
+        _writer.WriteLine("bar");
+        Assert.AreEqual("foofoobarfoo", _writer.ToString());
+    }
 
-        [Test]
-        public async Task FlushCloseDispose()
+    [Test]
+    public async Task FlushCloseDispose()
+    {
+        _writer.Write('a');
+
+        // Nops
+        _writer.Close();
+        _writer.Dispose();
+        await _writer.DisposeAsync();
+        _writer.Flush();
+        await _writer.FlushAsync();
+
+        _writer.Write('b');
+        AssertToString("ab");
+    }
+
+    [Test]
+    public async Task Write_Char()
+    {
+        _writer.Write('a');
+        AssertToString("a");
+
+        _writer.Write('b');
+        AssertToString("ab");
+
+        _writer.Write('\0');
+        _writer.Write('\r');
+        _writer.Write('\u1234');
+        AssertToString("ab\0\r\u1234");
+
+        _writer.Reset();
+        AssertToString("");
+
+        _writer.Write('a');
+        _writer.WriteLine('b');
+        _writer.Write('c');
+        _writer.Write('d');
+        _writer.WriteLine('e');
+        AssertToString("ab\ncde\n");
+
+        await _writer.WriteAsync('f');
+        await _writer.WriteLineAsync('g');
+        AssertToString("ab\ncde\nfg\n");
+
+        _writer.Reset();
+
+        for (int i = 0; i < 2050; i++)
         {
             _writer.Write('a');
-
-            // Nops
-            _writer.Close();
-            _writer.Dispose();
-            await _writer.DisposeAsync();
-            _writer.Flush();
-            await _writer.FlushAsync();
-
-            _writer.Write('b');
-            AssertToString("ab");
-        }
-
-        [Test]
-        public async Task Write_Char()
-        {
-            _writer.Write('a');
-            AssertToString("a");
-
-            _writer.Write('b');
-            AssertToString("ab");
-
-            _writer.Write('\0');
-            _writer.Write('\r');
-            _writer.Write('\u1234');
-            AssertToString("ab\0\r\u1234");
-
-            _writer.Reset();
-            AssertToString("");
-
-            _writer.Write('a');
-            _writer.WriteLine('b');
-            _writer.Write('c');
-            _writer.Write('d');
-            _writer.WriteLine('e');
-            AssertToString("ab\ncde\n");
-
-            await _writer.WriteAsync('f');
-            await _writer.WriteLineAsync('g');
-            AssertToString("ab\ncde\nfg\n");
-
-            _writer.Reset();
-
-            for (int i = 0; i < 2050; i++)
-            {
-                _writer.Write('a');
-                AssertToString(new string('a', i + 1));
-            }
-        }
-
-        [Test]
-        public async Task Write_String()
-        {
-            _writer.Write("foo");
-            AssertToString("foo");
-
-            _writer.WriteLine("bar");
-            AssertToString("foobar\n");
-
-            await _writer.WriteAsync("baz");
-            await _writer.WriteLineAsync("foo");
-            AssertToString("foobar\nbazfoo\n");
-
-            _writer.Write(new string('a', 1050));
-            AssertToString("foobar\nbazfoo\n" + new string('a', 1050));
-        }
-
-        [Test]
-        public async Task Write_Span()
-        {
-            _writer.Write("foo".AsSpan());
-            AssertToString("foo");
-
-            _writer.WriteLine("bar".AsSpan());
-            AssertToString("foobar\n");
-
-            await _writer.WriteAsync("baz".AsMemory());
-            await _writer.WriteLineAsync("foo".AsMemory());
-            AssertToString("foobar\nbazfoo\n");
-
-            _writer.Write(new string('a', 1050).AsSpan());
-            AssertToString("foobar\nbazfoo\n" + new string('a', 1050));
-        }
-
-        [Test]
-        public async Task Write_CharArray()
-        {
-            _writer.Write("foo".ToCharArray());
-            AssertToString("foo");
-
-            _writer.WriteLine("bar".ToCharArray());
-            AssertToString("foobar\n");
-
-            await _writer.WriteAsync("baz".ToCharArray());
-            await _writer.WriteLineAsync("foo".ToCharArray());
-            AssertToString("foobar\nbazfoo\n");
-
-            _writer.Write(new string('a', 1050).ToCharArray());
-            AssertToString("foobar\nbazfoo\n" + new string('a', 1050));
-        }
-
-        [Test]
-        public async Task Write_CharArrayWithIndexes()
-        {
-            _writer.Write("foo".ToCharArray(), 1, 1);
-            AssertToString("o");
-
-            _writer.WriteLine("bar".ToCharArray(), 0, 2);
-            AssertToString("oba\n");
-
-            await _writer.WriteAsync("baz".ToCharArray(), 0, 1);
-            await _writer.WriteLineAsync("foo".ToCharArray(), 0, 3);
-            AssertToString("oba\nbfoo\n");
-
-            _writer.Write(new string('a', 1050).ToCharArray(), 10, 1035);
-            AssertToString("oba\nbfoo\n" + new string('a', 1035));
-        }
-
-        [Test]
-        public async Task Write_StringBuilder()
-        {
-            _writer.Write(new StringBuilder("foo"));
-            AssertToString("foo");
-
-            _writer.WriteLine(new StringBuilder("bar"));
-            AssertToString("foobar\n");
-
-            await _writer.WriteAsync(new StringBuilder("baz"));
-            await _writer.WriteLineAsync(new StringBuilder("foo"));
-            AssertToString("foobar\nbazfoo\n");
-
-            var sb = new StringBuilder("foo");
-            sb.Append('a', 1050);
-            _writer.Write(sb);
-            AssertToString("foobar\nbazfoo\nfoo" + new string('a', 1050));
+            AssertToString(new string('a', i + 1));
         }
     }
+
+    [Test]
+    public async Task Write_String()
+    {
+        _writer.Write("foo");
+        AssertToString("foo");
+
+        _writer.WriteLine("bar");
+        AssertToString("foobar\n");
+
+        await _writer.WriteAsync("baz");
+        await _writer.WriteLineAsync("foo");
+        AssertToString("foobar\nbazfoo\n");
+
+        _writer.Write(new string('a', 1050));
+        AssertToString("foobar\nbazfoo\n" + new string('a', 1050));
+    }
+
+    [Test]
+    public async Task Write_Span()
+    {
+        _writer.Write("foo".AsSpan());
+        AssertToString("foo");
+
+        _writer.WriteLine("bar".AsSpan());
+        AssertToString("foobar\n");
+
+        await _writer.WriteAsync("baz".AsMemory());
+        await _writer.WriteLineAsync("foo".AsMemory());
+        AssertToString("foobar\nbazfoo\n");
+
+        _writer.Write(new string('a', 1050).AsSpan());
+        AssertToString("foobar\nbazfoo\n" + new string('a', 1050));
+    }
+
+    [Test]
+    public async Task Write_CharArray()
+    {
+        _writer.Write("foo".ToCharArray());
+        AssertToString("foo");
+
+        _writer.WriteLine("bar".ToCharArray());
+        AssertToString("foobar\n");
+
+        await _writer.WriteAsync("baz".ToCharArray());
+        await _writer.WriteLineAsync("foo".ToCharArray());
+        AssertToString("foobar\nbazfoo\n");
+
+        _writer.Write(new string('a', 1050).ToCharArray());
+        AssertToString("foobar\nbazfoo\n" + new string('a', 1050));
+    }
+
+    [Test]
+    public async Task Write_CharArrayWithIndexes()
+    {
+        _writer.Write("foo".ToCharArray(), 1, 1);
+        AssertToString("o");
+
+        _writer.WriteLine("bar".ToCharArray(), 0, 2);
+        AssertToString("oba\n");
+
+        await _writer.WriteAsync("baz".ToCharArray(), 0, 1);
+        await _writer.WriteLineAsync("foo".ToCharArray(), 0, 3);
+        AssertToString("oba\nbfoo\n");
+
+        _writer.Write(new string('a', 1050).ToCharArray(), 10, 1035);
+        AssertToString("oba\nbfoo\n" + new string('a', 1035));
+    }
+
+    [Test]
+    public async Task Write_StringBuilder()
+    {
+        _writer.Write(new StringBuilder("foo"));
+        AssertToString("foo");
+
+        _writer.WriteLine(new StringBuilder("bar"));
+        AssertToString("foobar\n");
+
+        await _writer.WriteAsync(new StringBuilder("baz"));
+        await _writer.WriteLineAsync(new StringBuilder("foo"));
+        AssertToString("foobar\nbazfoo\n");
+
+        var sb = new StringBuilder("foo");
+        sb.Append('a', 1050);
+        _writer.Write(sb);
+        AssertToString("foobar\nbazfoo\nfoo" + new string('a', 1050));
+    }
 }

src/Markdig.Tests/TestFencedCodeBlocks.cs

@@ -1,46 +1,43 @@
-using System.Linq;
 using Markdig.Syntax;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestFencedCodeBlocks
 {
-    public class TestFencedCodeBlocks
+    [Test]
+    [TestCase("c#", "c#", "")]
+    [TestCase("C#", "C#", "")]
+    [TestCase(" c#", "c#", "")]
+    [TestCase(" c# ", "c#", "")]
+    [TestCase(" \tc# ", "c#", "")]
+    [TestCase("\t c# \t", "c#", "")]
+    [TestCase(" c# ", "c#", "")]
+    [TestCase(" c# foo", "c#", "foo")]
+    [TestCase(" c# \t  fOo \t", "c#", "fOo")]
+    [TestCase("in\\%fo arg\\%ument", "in%fo", "arg%ument")]
+    [TestCase("info	 arg´ument", "info\t", "arg\u00B4ument")]
+    public void TestInfoAndArguments(string infoString, string expectedInfo, string expectedArguments)
     {
-        [Test]
-        [TestCase("c#", "c#", "")]
-        [TestCase("C#", "C#", "")]
-        [TestCase(" c#", "c#", "")]
-        [TestCase(" c# ", "c#", "")]
-        [TestCase(" \tc# ", "c#", "")]
-        [TestCase("\t c# \t", "c#", "")]
-        [TestCase(" c# ", "c#", "")]
-        [TestCase(" c# foo", "c#", "foo")]
-        [TestCase(" c# \t  fOo \t", "c#", "fOo")]
-        [TestCase("in\\%fo arg\\%ument", "in%fo", "arg%ument")]
-        [TestCase("info	 arg´ument", "info\t", "arg\u00B4ument")]
-        public void TestInfoAndArguments(string infoString, string expectedInfo, string expectedArguments)
+        Test('`');
+        Test('~');
+
+        void Test(char fencedChar)
         {
-            Test('`');
-            Test('~');
+            const string Contents = "Foo\nBar\n";
 
-            void Test(char fencedChar)
-            {
-                const string Contents = "Foo\nBar\n";
+            var fence = new string(fencedChar, 3);
+            string markdownText = $"{fence}{infoString}\n{Contents}\n{fence}\n";
 
-                string fence = new string(fencedChar, 3);
-                string markdownText = $"{fence}{infoString}\n{Contents}\n{fence}\n";
+            MarkdownDocument document = Markdown.Parse(markdownText);
 
-                MarkdownDocument document = Markdown.Parse(markdownText);
+            FencedCodeBlock codeBlock = document.Descendants<FencedCodeBlock>().Single();
 
-                FencedCodeBlock codeBlock = document.Descendants<FencedCodeBlock>().Single();
-
-                Assert.AreEqual(fencedChar, codeBlock.FencedChar);
-                Assert.AreEqual(3, codeBlock.OpeningFencedCharCount);
-                Assert.AreEqual(3, codeBlock.ClosingFencedCharCount);
-                Assert.AreEqual(expectedInfo, codeBlock.Info);
-                Assert.AreEqual(expectedArguments, codeBlock.Arguments);
-                Assert.AreEqual(Contents, codeBlock.Lines.ToString());
-            }
+            Assert.AreEqual(fencedChar, codeBlock.FencedChar);
+            Assert.AreEqual(3, codeBlock.OpeningFencedCharCount);
+            Assert.AreEqual(3, codeBlock.ClosingFencedCharCount);
+            Assert.AreEqual(expectedInfo, codeBlock.Info);
+            Assert.AreEqual(expectedArguments, codeBlock.Arguments);
+            Assert.AreEqual(Contents, codeBlock.Lines.ToString());
         }
     }
 }

src/Markdig.Tests/TestHtmlAttributes.cs

@@ -3,94 +3,91 @@
 // See the license.txt file in the project root for more information.
 
 using Markdig.Renderers.Html;
-using NUnit.Framework;
-using System.Collections.Generic;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture()]
+public class TestHtmlAttributes
 {
-    [TestFixture()]
-    public class TestHtmlAttributes
+    [Test]
+    public void TestAddClass()
     {
-        [Test]
-        public void TestAddClass()
-        {
-            var attributes = new HtmlAttributes();
-            attributes.AddClass("test");
-            Assert.NotNull(attributes.Classes);
-            Assert.AreEqual(new List<string>() { "test" }, attributes.Classes);
+        var attributes = new HtmlAttributes();
+        attributes.AddClass("test");
+        Assert.NotNull(attributes.Classes);
+        Assert.AreEqual(new List<string>() { "test" }, attributes.Classes);
 
-            attributes.AddClass("test");
-            Assert.AreEqual(1, attributes.Classes.Count);
+        attributes.AddClass("test");
+        Assert.AreEqual(1, attributes.Classes.Count);
 
-            attributes.AddClass("test1");
-            Assert.AreEqual(new List<string>() { "test", "test1" }, attributes.Classes);
-        }
+        attributes.AddClass("test1");
+        Assert.AreEqual(new List<string>() { "test", "test1" }, attributes.Classes);
+    }
 
-        [Test]
-        public void TestAddProperty()
-        {
-            var attributes = new HtmlAttributes();
-            attributes.AddProperty("key1", "1");
-            Assert.NotNull(attributes.Properties);
-            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, attributes.Properties);
+    [Test]
+    public void TestAddProperty()
+    {
+        var attributes = new HtmlAttributes();
+        attributes.AddProperty("key1", "1");
+        Assert.NotNull(attributes.Properties);
+        Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, attributes.Properties);
 
-            attributes.AddPropertyIfNotExist("key1", "1");
-            Assert.NotNull(attributes.Properties);
-            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, attributes.Properties);
+        attributes.AddPropertyIfNotExist("key1", "1");
+        Assert.NotNull(attributes.Properties);
+        Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, attributes.Properties);
 
-            attributes.AddPropertyIfNotExist("key2", "2");
-            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1"), new KeyValuePair<string, string>("key2", "2") }, attributes.Properties);
-        }
+        attributes.AddPropertyIfNotExist("key2", "2");
+        Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1"), new KeyValuePair<string, string>("key2", "2") }, attributes.Properties);
+    }
 
-        [Test]
-        public void TestCopyTo()
-        {
-            var from = new HtmlAttributes();
-            from.AddClass("test");
-            from.AddProperty("key1", "1");
+    [Test]
+    public void TestCopyTo()
+    {
+        var from = new HtmlAttributes();
+        from.AddClass("test");
+        from.AddProperty("key1", "1");
 
-            var to = new HtmlAttributes();
-            from.CopyTo(to);
+        var to = new HtmlAttributes();
+        from.CopyTo(to);
 
-            Assert.True(ReferenceEquals(from.Classes, to.Classes));
-            Assert.True(ReferenceEquals(from.Properties, to.Properties));
+        Assert.True(ReferenceEquals(from.Classes, to.Classes));
+        Assert.True(ReferenceEquals(from.Properties, to.Properties));
 
-            //          From: Classes      From: Properties     To: Classes     To: Properties
-            // test1:        null                null              null             null
-            from = new HtmlAttributes();
-            to = new HtmlAttributes();
-            from.CopyTo(to, false, false);
-            Assert.Null(to.Classes);
-            Assert.Null(to.Properties);
+        //          From: Classes      From: Properties     To: Classes     To: Properties
+        // test1:        null                null              null             null
+        from = new HtmlAttributes();
+        to = new HtmlAttributes();
+        from.CopyTo(to, false, false);
+        Assert.Null(to.Classes);
+        Assert.Null(to.Properties);
 
-            // test2:      ["test"]            ["key1", "1"]       null             null
-            from = new HtmlAttributes();
-            to = new HtmlAttributes();
-            from.AddClass("test");
-            from.AddProperty("key1", "1");
-            from.CopyTo(to, false, false);
-            Assert.AreEqual(new List<string>() { "test" }, to.Classes);
-            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1")}, to.Properties);
+        // test2:      ["test"]            ["key1", "1"]       null             null
+        from = new HtmlAttributes();
+        to = new HtmlAttributes();
+        from.AddClass("test");
+        from.AddProperty("key1", "1");
+        from.CopyTo(to, false, false);
+        Assert.AreEqual(new List<string>() { "test" }, to.Classes);
+        Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1")}, to.Properties);
 
-            // test3:        null                null            ["test"]       ["key1", "1"]       
-            from = new HtmlAttributes();
-            to = new HtmlAttributes();
-            to.AddClass("test");
-            to.AddProperty("key1", "1");
-            from.CopyTo(to, false, false);
-            Assert.AreEqual(new List<string>() { "test" }, to.Classes);
-            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, to.Properties);
+        // test3:        null                null            ["test"]       ["key1", "1"]       
+        from = new HtmlAttributes();
+        to = new HtmlAttributes();
+        to.AddClass("test");
+        to.AddProperty("key1", "1");
+        from.CopyTo(to, false, false);
+        Assert.AreEqual(new List<string>() { "test" }, to.Classes);
+        Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1") }, to.Properties);
 
-            // test4:      ["test1"]           ["key2", "2"]     ["test"]       ["key1", "1"]       
-            from = new HtmlAttributes();
-            to = new HtmlAttributes();
-            from.AddClass("test1");
-            from.AddProperty("key2", "2");
-            to.AddClass("test");
-            to.AddProperty("key1", "1");
-            from.CopyTo(to, false, false);
-            Assert.AreEqual(new List<string>() { "test", "test1" }, to.Classes);
-            Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1"), new KeyValuePair<string, string>("key2", "2") }, to.Properties);
-        }
+        // test4:      ["test1"]           ["key2", "2"]     ["test"]       ["key1", "1"]       
+        from = new HtmlAttributes();
+        to = new HtmlAttributes();
+        from.AddClass("test1");
+        from.AddProperty("key2", "2");
+        to.AddClass("test");
+        to.AddProperty("key1", "1");
+        from.CopyTo(to, false, false);
+        Assert.AreEqual(new List<string>() { "test", "test1" }, to.Classes);
+        Assert.AreEqual(new List<KeyValuePair<string, string>>() { new KeyValuePair<string, string>("key1", "1"), new KeyValuePair<string, string>("key2", "2") }, to.Properties);
     }
 }

src/Markdig.Tests/TestHtmlHelper.cs

@@ -1,30 +1,28 @@
 // Copyright (c) Alexandre Mutel. All rights reserved.
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
-using NUnit.Framework;
 using Markdig.Helpers;
 
-namespace Markdig.Tests
-{
-    [TestFixture]
-    public class TestHtmlHelper
-    {
-        [Test]
-        public void TestParseHtmlTagSimple()
-        {
-            var inputTag = "<a>";
-            var text = new StringSlice(inputTag);
-            Assert.True(HtmlHelper.TryParseHtmlTag(ref text, out string outputTag));
-            Assert.AreEqual(inputTag, outputTag);
-        }
+namespace Markdig.Tests;
 
-        [Test]
-        public void TestParseHtmlTagSimpleWithAttribute()
-        {
-            var inputTag = "<a href='http://google.com'>";
-            var text = new StringSlice(inputTag);
-            Assert.True(HtmlHelper.TryParseHtmlTag(ref text, out string outputTag));
-            Assert.AreEqual(inputTag, outputTag);
-        }
+[TestFixture]
+public class TestHtmlHelper
+{
+    [Test]
+    public void TestParseHtmlTagSimple()
+    {
+        var inputTag = "<a>";
+        var text = new StringSlice(inputTag);
+        Assert.True(HtmlHelper.TryParseHtmlTag(ref text, out string outputTag));
+        Assert.AreEqual(inputTag, outputTag);
+    }
+
+    [Test]
+    public void TestParseHtmlTagSimpleWithAttribute()
+    {
+        var inputTag = "<a href='http://google.com'>";
+        var text = new StringSlice(inputTag);
+        Assert.True(HtmlHelper.TryParseHtmlTag(ref text, out string outputTag));
+        Assert.AreEqual(inputTag, outputTag);
     }
 }

src/Markdig.Tests/TestImageAltText.cs

@@ -1,25 +1,23 @@
-using NUnit.Framework;
 using System.Text.RegularExpressions;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestImageAltText
 {
-    [TestFixture]
-    public class TestImageAltText
+    [Test]
+    [TestCase("![](image.jpg)", "")]
+    [TestCase("![foo](image.jpg)", "foo")]
+    [TestCase("![][1]\n\n[1]: image.jpg", "")]
+    [TestCase("![bar][1]\n\n[1]: image.jpg", "bar")]
+    [TestCase("![](image.jpg 'title')", "")]
+    [TestCase("![foo](image.jpg 'title')", "foo")]
+    [TestCase("![][1]\n\n[1]: image.jpg 'title'", "")]
+    [TestCase("![bar][1]\n\n[1]: image.jpg 'title'", "bar")]
+    public void TestImageHtmlAltText(string markdown, string expectedAltText)
     {
-        [Test]
-        [TestCase("![](image.jpg)", "")]
-        [TestCase("![foo](image.jpg)", "foo")]
-        [TestCase("![][1]\n\n[1]: image.jpg", "")]
-        [TestCase("![bar][1]\n\n[1]: image.jpg", "bar")]
-        [TestCase("![](image.jpg 'title')", "")]
-        [TestCase("![foo](image.jpg 'title')", "foo")]
-        [TestCase("![][1]\n\n[1]: image.jpg 'title'", "")]
-        [TestCase("![bar][1]\n\n[1]: image.jpg 'title'", "bar")]
-        public void TestImageHtmlAltText(string markdown, string expectedAltText)
-        {
-            string html = Markdown.ToHtml(markdown);
-            string actualAltText = Regex.Match(html, "alt=\"(.*?)\"").Groups[1].Value;
-            Assert.AreEqual(expectedAltText, actualAltText);
-        }
+        string html = Markdown.ToHtml(markdown);
+        string actualAltText = Regex.Match(html, "alt=\"(.*?)\"").Groups[1].Value;
+        Assert.AreEqual(expectedAltText, actualAltText);
     }
 }

src/Markdig.Tests/TestLazySubstring.cs

@@ -1,67 +1,65 @@
 using Markdig.Helpers;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestLazySubstring
 {
-    public class TestLazySubstring
+    [Theory]
+    [TestCase("")]
+    [TestCase("a")]
+    [TestCase("foo")]
+    public void LazySubstring_ReturnsCorrectSubstring(string text)
     {
-        [Theory]
-        [TestCase("")]
-        [TestCase("a")]
-        [TestCase("foo")]
-        public void LazySubstring_ReturnsCorrectSubstring(string text)
-        {
-            var substring = new LazySubstring(text);
-            Assert.AreEqual(0, substring.Offset);
-            Assert.AreEqual(text.Length, substring.Length);
+        var substring = new LazySubstring(text);
+        Assert.AreEqual(0, substring.Offset);
+        Assert.AreEqual(text.Length, substring.Length);
 
-            Assert.AreEqual(text, substring.AsSpan().ToString());
-            Assert.AreEqual(text, substring.AsSpan().ToString());
-            Assert.AreEqual(0, substring.Offset);
-            Assert.AreEqual(text.Length, substring.Length);
+        Assert.AreEqual(text, substring.AsSpan().ToString());
+        Assert.AreEqual(text, substring.AsSpan().ToString());
+        Assert.AreEqual(0, substring.Offset);
+        Assert.AreEqual(text.Length, substring.Length);
 
-            Assert.AreSame(substring.ToString(), substring.ToString());
-            Assert.AreEqual(text, substring.ToString());
-            Assert.AreEqual(0, substring.Offset);
-            Assert.AreEqual(text.Length, substring.Length);
+        Assert.AreSame(substring.ToString(), substring.ToString());
+        Assert.AreEqual(text, substring.ToString());
+        Assert.AreEqual(0, substring.Offset);
+        Assert.AreEqual(text.Length, substring.Length);
 
-            Assert.AreEqual(text, substring.AsSpan().ToString());
-            Assert.AreEqual(text, substring.AsSpan().ToString());
-            Assert.AreEqual(0, substring.Offset);
-            Assert.AreEqual(text.Length, substring.Length);
-        }
+        Assert.AreEqual(text, substring.AsSpan().ToString());
+        Assert.AreEqual(text, substring.AsSpan().ToString());
+        Assert.AreEqual(0, substring.Offset);
+        Assert.AreEqual(text.Length, substring.Length);
+    }
 
-        [Theory]
-        [TestCase("", 0, 0)]
-        [TestCase("a", 0, 0)]
-        [TestCase("a", 1, 0)]
-        [TestCase("a", 0, 1)]
-        [TestCase("foo", 1, 0)]
-        [TestCase("foo", 1, 1)]
-        [TestCase("foo", 1, 2)]
-        [TestCase("foo", 0, 3)]
-        public void LazySubstring_ReturnsCorrectSubstring(string text, int start, int length)
-        {
-            var substring = new LazySubstring(text, start, length);
-            Assert.AreEqual(start, substring.Offset);
-            Assert.AreEqual(length, substring.Length);
+    [Theory]
+    [TestCase("", 0, 0)]
+    [TestCase("a", 0, 0)]
+    [TestCase("a", 1, 0)]
+    [TestCase("a", 0, 1)]
+    [TestCase("foo", 1, 0)]
+    [TestCase("foo", 1, 1)]
+    [TestCase("foo", 1, 2)]
+    [TestCase("foo", 0, 3)]
+    public void LazySubstring_ReturnsCorrectSubstring(string text, int start, int length)
+    {
+        var substring = new LazySubstring(text, start, length);
+        Assert.AreEqual(start, substring.Offset);
+        Assert.AreEqual(length, substring.Length);
 
-            string expectedSubstring = text.Substring(start, length);
+        string expectedSubstring = text.Substring(start, length);
 
-            Assert.AreEqual(expectedSubstring, substring.AsSpan().ToString());
-            Assert.AreEqual(expectedSubstring, substring.AsSpan().ToString());
-            Assert.AreEqual(start, substring.Offset);
-            Assert.AreEqual(length, substring.Length);
+        Assert.AreEqual(expectedSubstring, substring.AsSpan().ToString());
+        Assert.AreEqual(expectedSubstring, substring.AsSpan().ToString());
+        Assert.AreEqual(start, substring.Offset);
+        Assert.AreEqual(length, substring.Length);
 
-            Assert.AreSame(substring.ToString(), substring.ToString());
-            Assert.AreEqual(expectedSubstring, substring.ToString());
-            Assert.AreEqual(0, substring.Offset);
-            Assert.AreEqual(length, substring.Length);
+        Assert.AreSame(substring.ToString(), substring.ToString());
+        Assert.AreEqual(expectedSubstring, substring.ToString());
+        Assert.AreEqual(0, substring.Offset);
+        Assert.AreEqual(length, substring.Length);
 
-            Assert.AreEqual(expectedSubstring, substring.AsSpan().ToString());
-            Assert.AreEqual(expectedSubstring, substring.AsSpan().ToString());
-            Assert.AreEqual(0, substring.Offset);
-            Assert.AreEqual(length, substring.Length);
-        }
+        Assert.AreEqual(expectedSubstring, substring.AsSpan().ToString());
+        Assert.AreEqual(expectedSubstring, substring.AsSpan().ToString());
+        Assert.AreEqual(0, substring.Offset);
+        Assert.AreEqual(length, substring.Length);
     }
 }

src/Markdig.Tests/TestLineReader.cs

@@ -2,126 +2,124 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using NUnit.Framework;
 using Markdig.Helpers;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+/// <summary>
+/// Test for <see cref="LineReader"/>.
+/// </summary>
+[TestFixture]
+public class TestLineReader
 {
-    /// <summary>
-    /// Test for <see cref="LineReader"/>.
-    /// </summary>
-    [TestFixture]
-    public class TestLineReader
+    [Test]
+    public void TestEmpty()
     {
-        [Test]
-        public void TestEmpty()
-        {
-            var lineReader = new LineReader("");
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+        var lineReader = new LineReader("");
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestLinesOnlyLf()
-        {
-            var lineReader = new LineReader("\n\n\n");
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.AreEqual(1, lineReader.SourcePosition);
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.AreEqual(2, lineReader.SourcePosition);
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestLinesOnlyLf()
+    {
+        var lineReader = new LineReader("\n\n\n");
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.AreEqual(1, lineReader.SourcePosition);
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.AreEqual(2, lineReader.SourcePosition);
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestLinesOnlyCr()
-        {
-            var lineReader = new LineReader("\r\r\r");
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.AreEqual(1, lineReader.SourcePosition);
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.AreEqual(2, lineReader.SourcePosition);
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestLinesOnlyCr()
+    {
+        var lineReader = new LineReader("\r\r\r");
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.AreEqual(1, lineReader.SourcePosition);
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.AreEqual(2, lineReader.SourcePosition);
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestLinesOnlyCrLf()
-        {
-            var lineReader = new LineReader("\r\n\r\n\r\n");
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.AreEqual(2, lineReader.SourcePosition);
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.AreEqual(4, lineReader.SourcePosition);
-            Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestLinesOnlyCrLf()
+    {
+        var lineReader = new LineReader("\r\n\r\n\r\n");
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.AreEqual(2, lineReader.SourcePosition);
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.AreEqual(4, lineReader.SourcePosition);
+        Assert.AreEqual(string.Empty, lineReader.ReadLine().ToString());
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestNoEndOfLine()
-        {
-            var lineReader = new LineReader("123");
-            Assert.AreEqual("123", lineReader.ReadLine().ToString());
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestNoEndOfLine()
+    {
+        var lineReader = new LineReader("123");
+        Assert.AreEqual("123", lineReader.ReadLine().ToString());
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestLf()
-        {
-            var lineReader = new LineReader("123\n");
-            Assert.AreEqual("123", lineReader.ReadLine().ToString());
-            Assert.AreEqual(4, lineReader.SourcePosition);
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestLf()
+    {
+        var lineReader = new LineReader("123\n");
+        Assert.AreEqual("123", lineReader.ReadLine().ToString());
+        Assert.AreEqual(4, lineReader.SourcePosition);
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestLf2()
-        {
-            // When limited == true, we limit the internal buffer exactly after the first new line char '\n'
-            var lineReader = new LineReader("123\n456");
-            Assert.AreEqual("123", lineReader.ReadLine().ToString());
-            Assert.AreEqual(4, lineReader.SourcePosition);
-            Assert.AreEqual("456", lineReader.ReadLine().ToString());
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestLf2()
+    {
+        // When limited == true, we limit the internal buffer exactly after the first new line char '\n'
+        var lineReader = new LineReader("123\n456");
+        Assert.AreEqual("123", lineReader.ReadLine().ToString());
+        Assert.AreEqual(4, lineReader.SourcePosition);
+        Assert.AreEqual("456", lineReader.ReadLine().ToString());
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestCr()
-        {
-            var lineReader = new LineReader("123\r");
-            Assert.AreEqual("123", lineReader.ReadLine().ToString());
-            Assert.AreEqual(4, lineReader.SourcePosition);
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestCr()
+    {
+        var lineReader = new LineReader("123\r");
+        Assert.AreEqual("123", lineReader.ReadLine().ToString());
+        Assert.AreEqual(4, lineReader.SourcePosition);
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestCr2()
-        {
-            var lineReader = new LineReader("123\r456");
-            Assert.AreEqual("123", lineReader.ReadLine().ToString());
-            Assert.AreEqual(4, lineReader.SourcePosition);
-            Assert.AreEqual("456", lineReader.ReadLine().ToString());
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestCr2()
+    {
+        var lineReader = new LineReader("123\r456");
+        Assert.AreEqual("123", lineReader.ReadLine().ToString());
+        Assert.AreEqual(4, lineReader.SourcePosition);
+        Assert.AreEqual("456", lineReader.ReadLine().ToString());
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestCrLf()
-        {
-            // When limited == true, we limit the internal buffer exactly after the first new line char '\r'
-            // and we check that we don't get a new line for `\n` 
-            var lineReader = new LineReader("123\r\n");
-            Assert.AreEqual("123", lineReader.ReadLine().ToString());
-            Assert.AreEqual(5, lineReader.SourcePosition);
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestCrLf()
+    {
+        // When limited == true, we limit the internal buffer exactly after the first new line char '\r'
+        // and we check that we don't get a new line for `\n` 
+        var lineReader = new LineReader("123\r\n");
+        Assert.AreEqual("123", lineReader.ReadLine().ToString());
+        Assert.AreEqual(5, lineReader.SourcePosition);
+        Assert.Null(lineReader.ReadLine().Text);
+    }
 
-        [Test]
-        public void TestCrLf2()
-        {
-            var lineReader = new LineReader("123\r\n456");
-            Assert.AreEqual("123", lineReader.ReadLine().ToString());
-            Assert.AreEqual(5, lineReader.SourcePosition);
-            Assert.AreEqual("456", lineReader.ReadLine().ToString());
-            Assert.Null(lineReader.ReadLine().Text);
-        }
+    [Test]
+    public void TestCrLf2()
+    {
+        var lineReader = new LineReader("123\r\n456");
+        Assert.AreEqual("123", lineReader.ReadLine().ToString());
+        Assert.AreEqual(5, lineReader.SourcePosition);
+        Assert.AreEqual("456", lineReader.ReadLine().ToString());
+        Assert.Null(lineReader.ReadLine().Text);
     }
 }

src/Markdig.Tests/TestLinkHelper.cs

@@ -2,374 +2,372 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using NUnit.Framework;
 using Markdig.Helpers;
 using Markdig.Syntax;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestLinkHelper
 {
-    [TestFixture]
-    public class TestLinkHelper
+    [Test]
+    public void TestUrlSimple()
     {
-        [Test]
-        public void TestUrlSimple()
-        {
-            var text = new StringSlice("toto tutu");
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
-            Assert.AreEqual("toto", link);
-            Assert.AreEqual(' ', text.CurrentChar);
-        }
+        var text = new StringSlice("toto tutu");
+        Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
+        Assert.AreEqual("toto", link);
+        Assert.AreEqual(' ', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestUrlUrl()
-        {
-            var text = new StringSlice("http://google.com)");
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
-            Assert.AreEqual("http://google.com", link);
-            Assert.AreEqual(')', text.CurrentChar);
-        }
+    [Test]
+    public void TestUrlUrl()
+    {
+        var text = new StringSlice("http://google.com)");
+        Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
+        Assert.AreEqual("http://google.com", link);
+        Assert.AreEqual(')', text.CurrentChar);
+    }
 
-        [Test]
-        [TestCase("http://google.com.")]
-        [TestCase("http://google.com. ")]
-        public void TestUrlTrailingFullStop(string uri)
-        {
-            var text = new StringSlice(uri);
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _, true));
-            Assert.AreEqual("http://google.com", link);
-            Assert.AreEqual('.', text.CurrentChar);
-        }
+    [Test]
+    [TestCase("http://google.com.")]
+    [TestCase("http://google.com. ")]
+    public void TestUrlTrailingFullStop(string uri)
+    {
+        var text = new StringSlice(uri);
+        Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _, true));
+        Assert.AreEqual("http://google.com", link);
+        Assert.AreEqual('.', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestUrlNestedParenthesis()
-        {
-            var text = new StringSlice("(toto)tutu(tata) nooo");
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
-            Assert.AreEqual("(toto)tutu(tata)", link);
-            Assert.AreEqual(' ', text.CurrentChar);
-        }
+    [Test]
+    public void TestUrlNestedParenthesis()
+    {
+        var text = new StringSlice("(toto)tutu(tata) nooo");
+        Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
+        Assert.AreEqual("(toto)tutu(tata)", link);
+        Assert.AreEqual(' ', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestUrlAlternate()
-        {
-            var text = new StringSlice("<toto_tata_tutu> nooo");
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
-            Assert.AreEqual("toto_tata_tutu", link);
-            Assert.AreEqual(' ', text.CurrentChar);
-        }
+    [Test]
+    public void TestUrlAlternate()
+    {
+        var text = new StringSlice("<toto_tata_tutu> nooo");
+        Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
+        Assert.AreEqual("toto_tata_tutu", link);
+        Assert.AreEqual(' ', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestUrlAlternateInvalid()
-        {
-            var text = new StringSlice("<toto_tata_tutu");
-            Assert.False(LinkHelper.TryParseUrl(ref text, out string link, out _));
-        }
+    [Test]
+    public void TestUrlAlternateInvalid()
+    {
+        var text = new StringSlice("<toto_tata_tutu");
+        Assert.False(LinkHelper.TryParseUrl(ref text, out string link, out _));
+    }
 
-        [Test]
-        public void TestTitleSimple()
-        {
-            var text = new StringSlice(@"'tata\tutu\''");
-            Assert.True(LinkHelper.TryParseTitle(ref text, out string title, out _));
-            Assert.AreEqual(@"tata\tutu'", title);
-        }
+    [Test]
+    public void TestTitleSimple()
+    {
+        var text = new StringSlice(@"'tata\tutu\''");
+        Assert.True(LinkHelper.TryParseTitle(ref text, out string title, out _));
+        Assert.AreEqual(@"tata\tutu'", title);
+    }
 
-        [Test]
-        public void TestTitleSimpleAlternate()
-        {
-            var text = new StringSlice(@"""tata\tutu\"""" ");
-            Assert.True(LinkHelper.TryParseTitle(ref text, out string title, out _));
-            Assert.AreEqual(@"tata\tutu""", title);
-            Assert.AreEqual(' ', text.CurrentChar);
-        }
+    [Test]
+    public void TestTitleSimpleAlternate()
+    {
+        var text = new StringSlice(@"""tata\tutu\"""" ");
+        Assert.True(LinkHelper.TryParseTitle(ref text, out string title, out _));
+        Assert.AreEqual(@"tata\tutu""", title);
+        Assert.AreEqual(' ', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestUrlAndTitle()
-        {
-            //                           0         1         2         3
-            //                           0123456789012345678901234567890123456789
-            var text = new StringSlice(@"(http://google.com 'this is a title')ABC");
-            Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
-            Assert.AreEqual("http://google.com", link);
-            Assert.AreEqual("this is a title", title);
-            Assert.AreEqual(new SourceSpan(1, 17), linkSpan);
-            Assert.AreEqual(new SourceSpan(19, 35), titleSpan);
-            Assert.AreEqual('A', text.CurrentChar);
-        }
+    [Test]
+    public void TestUrlAndTitle()
+    {
+        //                           0         1         2         3
+        //                           0123456789012345678901234567890123456789
+        var text = new StringSlice(@"(http://google.com 'this is a title')ABC");
+        Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
+        Assert.AreEqual("http://google.com", link);
+        Assert.AreEqual("this is a title", title);
+        Assert.AreEqual(new SourceSpan(1, 17), linkSpan);
+        Assert.AreEqual(new SourceSpan(19, 35), titleSpan);
+        Assert.AreEqual('A', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestUrlAndTitleEmpty()
-        {
-            //                           01234
-            var text = new StringSlice(@"(<>)A");
-            Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
-            Assert.AreEqual(string.Empty, link);
-            Assert.AreEqual(string.Empty, title);
-            Assert.AreEqual(new SourceSpan(1, 2), linkSpan);
-            Assert.AreEqual(SourceSpan.Empty, titleSpan);
-            Assert.AreEqual('A', text.CurrentChar);
-        }
+    [Test]
+    public void TestUrlAndTitleEmpty()
+    {
+        //                           01234
+        var text = new StringSlice(@"(<>)A");
+        Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
+        Assert.AreEqual(string.Empty, link);
+        Assert.AreEqual(string.Empty, title);
+        Assert.AreEqual(new SourceSpan(1, 2), linkSpan);
+        Assert.AreEqual(SourceSpan.Empty, titleSpan);
+        Assert.AreEqual('A', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestUrlAndTitleEmpty2()
-        {
-            //                           012345
-            var text = new StringSlice(@"( <> )A");
-            Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
-            Assert.AreEqual(string.Empty, link);
-            Assert.AreEqual(string.Empty, title);
-            Assert.AreEqual(new SourceSpan(2, 3), linkSpan);
-            Assert.AreEqual(SourceSpan.Empty, titleSpan);
-            Assert.AreEqual('A', text.CurrentChar);
-        }
+    [Test]
+    public void TestUrlAndTitleEmpty2()
+    {
+        //                           012345
+        var text = new StringSlice(@"( <> )A");
+        Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
+        Assert.AreEqual(string.Empty, link);
+        Assert.AreEqual(string.Empty, title);
+        Assert.AreEqual(new SourceSpan(2, 3), linkSpan);
+        Assert.AreEqual(SourceSpan.Empty, titleSpan);
+        Assert.AreEqual('A', text.CurrentChar);
+    }
 
 
-        [Test]
-        public void TestUrlEmptyWithTitleWithMultipleSpaces()
-        {
-            //                           0         1         2
-            //                           0123456789012345678901234567
-            var text = new StringSlice(@"(   <>      'toto'       )A");
-            Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
-            Assert.AreEqual(string.Empty, link);
-            Assert.AreEqual("toto", title);
-            Assert.AreEqual(new SourceSpan(4, 5), linkSpan);
-            Assert.AreEqual(new SourceSpan(12, 17), titleSpan);
-            Assert.AreEqual('A', text.CurrentChar);
-        }
+    [Test]
+    public void TestUrlEmptyWithTitleWithMultipleSpaces()
+    {
+        //                           0         1         2
+        //                           0123456789012345678901234567
+        var text = new StringSlice(@"(   <>      'toto'       )A");
+        Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
+        Assert.AreEqual(string.Empty, link);
+        Assert.AreEqual("toto", title);
+        Assert.AreEqual(new SourceSpan(4, 5), linkSpan);
+        Assert.AreEqual(new SourceSpan(12, 17), titleSpan);
+        Assert.AreEqual('A', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestUrlEmpty()
-        {
-            var text = new StringSlice(@"()A");
-            Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
-            Assert.AreEqual(string.Empty, link);
-            Assert.AreEqual(string.Empty, title);
-            Assert.AreEqual(SourceSpan.Empty, linkSpan);
-            Assert.AreEqual(SourceSpan.Empty, titleSpan);
-            Assert.AreEqual('A', text.CurrentChar);
-        }
+    [Test]
+    public void TestUrlEmpty()
+    {
+        var text = new StringSlice(@"()A");
+        Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
+        Assert.AreEqual(string.Empty, link);
+        Assert.AreEqual(string.Empty, title);
+        Assert.AreEqual(SourceSpan.Empty, linkSpan);
+        Assert.AreEqual(SourceSpan.Empty, titleSpan);
+        Assert.AreEqual('A', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestMultipleLines()
-        {
-            //                          0          1         2          3
-            //                          01 2345678901234567890 1234567890123456789
-            var text = new StringSlice("(\n<http://google.com>\n    'toto' )A");
-            Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
-            Assert.AreEqual("http://google.com", link);
-            Assert.AreEqual("toto", title);
-            Assert.AreEqual(new SourceSpan(2, 20), linkSpan);
-            Assert.AreEqual(new SourceSpan(26, 31), titleSpan);
-            Assert.AreEqual('A', text.CurrentChar);
-        }
+    [Test]
+    public void TestMultipleLines()
+    {
+        //                          0          1         2          3
+        //                          01 2345678901234567890 1234567890123456789
+        var text = new StringSlice("(\n<http://google.com>\n    'toto' )A");
+        Assert.True(LinkHelper.TryParseInlineLink(ref text, out string link, out string title, out SourceSpan linkSpan, out SourceSpan titleSpan));
+        Assert.AreEqual("http://google.com", link);
+        Assert.AreEqual("toto", title);
+        Assert.AreEqual(new SourceSpan(2, 20), linkSpan);
+        Assert.AreEqual(new SourceSpan(26, 31), titleSpan);
+        Assert.AreEqual('A', text.CurrentChar);
+    }
 
-        [Test]
-        public void TestLabelSimple()
-        {
-            //                          01234
-            var text = new StringSlice("[foo]");
-            Assert.True(LinkHelper.TryParseLabel(ref text, out string label, out SourceSpan labelSpan));
-            Assert.AreEqual(new SourceSpan(1, 3), labelSpan);
-            Assert.AreEqual("foo", label);
-        }
+    [Test]
+    public void TestLabelSimple()
+    {
+        //                          01234
+        var text = new StringSlice("[foo]");
+        Assert.True(LinkHelper.TryParseLabel(ref text, out string label, out SourceSpan labelSpan));
+        Assert.AreEqual(new SourceSpan(1, 3), labelSpan);
+        Assert.AreEqual("foo", label);
+    }
 
-        [Test]
-        public void TestLabelEscape()
-        {
-            //                           012345678
-            var text = new StringSlice(@"[fo\[\]o]");
-            Assert.True(LinkHelper.TryParseLabel(ref text, out string label, out SourceSpan labelSpan));
-            Assert.AreEqual(new SourceSpan(1, 7), labelSpan);
-            Assert.AreEqual(@"fo[]o", label);
-        }
+    [Test]
+    public void TestLabelEscape()
+    {
+        //                           012345678
+        var text = new StringSlice(@"[fo\[\]o]");
+        Assert.True(LinkHelper.TryParseLabel(ref text, out string label, out SourceSpan labelSpan));
+        Assert.AreEqual(new SourceSpan(1, 7), labelSpan);
+        Assert.AreEqual(@"fo[]o", label);
+    }
 
-        [Test]
-        public void TestLabelEscape2()
-        {
-            //                           0123
-            var text = new StringSlice(@"[\]]");
-            Assert.True(LinkHelper.TryParseLabel(ref text, out string label, out SourceSpan labelSpan));
-            Assert.AreEqual(new SourceSpan(1, 2), labelSpan);
-            Assert.AreEqual(@"]", label);
-        }
+    [Test]
+    public void TestLabelEscape2()
+    {
+        //                           0123
+        var text = new StringSlice(@"[\]]");
+        Assert.True(LinkHelper.TryParseLabel(ref text, out string label, out SourceSpan labelSpan));
+        Assert.AreEqual(new SourceSpan(1, 2), labelSpan);
+        Assert.AreEqual(@"]", label);
+    }
 
-        [Test]
-        public void TestLabelInvalids()
-        {
-            Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"a"), out string label));
-            Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"["), out label));
-            Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"[\x]"), out label));
-            Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"[[]"), out label));
-            Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"[     ]"), out label));
-            Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"[  \t \n  ]"), out label));
-        }
+    [Test]
+    public void TestLabelInvalids()
+    {
+        Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"a"), out string label));
+        Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"["), out label));
+        Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"[\x]"), out label));
+        Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"[[]"), out label));
+        Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"[     ]"), out label));
+        Assert.False(LinkHelper.TryParseLabel(new StringSlice(@"[  \t \n  ]"), out label));
+    }
 
-        [Test]
-        public void TestLabelWhitespaceCollapsedAndTrim()
-        {
-            //                           0         1         2         3
-            //                           0123456789012345678901234567890123456789
-            var text = new StringSlice(@"[     fo    o    z     ]");
-            Assert.True(LinkHelper.TryParseLabel(ref text, out string label, out SourceSpan labelSpan));
-            Assert.AreEqual(new SourceSpan(6, 17), labelSpan);
-            Assert.AreEqual(@"fo o z", label);
-        }
+    [Test]
+    public void TestLabelWhitespaceCollapsedAndTrim()
+    {
+        //                           0         1         2         3
+        //                           0123456789012345678901234567890123456789
+        var text = new StringSlice(@"[     fo    o    z     ]");
+        Assert.True(LinkHelper.TryParseLabel(ref text, out string label, out SourceSpan labelSpan));
+        Assert.AreEqual(new SourceSpan(6, 17), labelSpan);
+        Assert.AreEqual(@"fo o z", label);
+    }
 
-        [Test]
-        public void TestlLinkReferenceDefinitionSimple()
-        {
-            //                           0         1         2         3
-            //                           0123456789012345678901234567890123456789
-            var text = new StringSlice(@"[foo]: /toto 'title'");
-            Assert.True(LinkHelper.TryParseLinkReferenceDefinition(ref text, out string label, out string url, out string title, out SourceSpan labelSpan, out SourceSpan urlSpan, out SourceSpan titleSpan));
-            Assert.AreEqual(@"foo", label);
-            Assert.AreEqual(@"/toto", url);
-            Assert.AreEqual(@"title", title);
-            Assert.AreEqual(new SourceSpan(1, 3), labelSpan);
-            Assert.AreEqual(new SourceSpan(7, 11), urlSpan);
-            Assert.AreEqual(new SourceSpan(13, 19), titleSpan);
+    [Test]
+    public void TestlLinkReferenceDefinitionSimple()
+    {
+        //                           0         1         2         3
+        //                           0123456789012345678901234567890123456789
+        var text = new StringSlice(@"[foo]: /toto 'title'");
+        Assert.True(LinkHelper.TryParseLinkReferenceDefinition(ref text, out string label, out string url, out string title, out SourceSpan labelSpan, out SourceSpan urlSpan, out SourceSpan titleSpan));
+        Assert.AreEqual(@"foo", label);
+        Assert.AreEqual(@"/toto", url);
+        Assert.AreEqual(@"title", title);
+        Assert.AreEqual(new SourceSpan(1, 3), labelSpan);
+        Assert.AreEqual(new SourceSpan(7, 11), urlSpan);
+        Assert.AreEqual(new SourceSpan(13, 19), titleSpan);
 
-        }
+    }
 
-        [Test]
-        public void TestAutoLinkUrlSimple()
-        {
-            var text = new StringSlice(@"<http://google.com>");
-            Assert.True(LinkHelper.TryParseAutolink(ref text, out string url, out bool isEmail));
-            Assert.False(isEmail);
-            Assert.AreEqual("http://google.com", url);
-        }
+    [Test]
+    public void TestAutoLinkUrlSimple()
+    {
+        var text = new StringSlice(@"<http://google.com>");
+        Assert.True(LinkHelper.TryParseAutolink(ref text, out string url, out bool isEmail));
+        Assert.False(isEmail);
+        Assert.AreEqual("http://google.com", url);
+    }
 
-        [Test]
-        public void TestAutoLinkEmailSimple()
-        {
-            var text = new StringSlice(@"<user@host.com>");
-            Assert.True(LinkHelper.TryParseAutolink(ref text, out string email, out bool isEmail));
-            Assert.True(isEmail);
-            Assert.AreEqual("user@host.com", email);
-        }
+    [Test]
+    public void TestAutoLinkEmailSimple()
+    {
+        var text = new StringSlice(@"<user@host.com>");
+        Assert.True(LinkHelper.TryParseAutolink(ref text, out string email, out bool isEmail));
+        Assert.True(isEmail);
+        Assert.AreEqual("user@host.com", email);
+    }
 
-        [Test]
-        public void TestAutolinkInvalid()
-        {
-            Assert.False(LinkHelper.TryParseAutolink(new StringSlice(@""), out string text, out bool isEmail));
-            Assert.False(LinkHelper.TryParseAutolink(new StringSlice(@"<"), out text, out isEmail));
-            Assert.False(LinkHelper.TryParseAutolink(new StringSlice(@"<ab"), out text, out isEmail));
-            Assert.False(LinkHelper.TryParseAutolink(new StringSlice(@"<user@>"), out text, out isEmail));
-        }
+    [Test]
+    public void TestAutolinkInvalid()
+    {
+        Assert.False(LinkHelper.TryParseAutolink(new StringSlice(@""), out string text, out bool isEmail));
+        Assert.False(LinkHelper.TryParseAutolink(new StringSlice(@"<"), out text, out isEmail));
+        Assert.False(LinkHelper.TryParseAutolink(new StringSlice(@"<ab"), out text, out isEmail));
+        Assert.False(LinkHelper.TryParseAutolink(new StringSlice(@"<user@>"), out text, out isEmail));
+    }
 
-        [TestCase("Header identifiers in HTML", "header-identifiers-in-html")]
-        [TestCase("* Dogs*?--in *my* house?", "dogs-in-my-house")] // Not Pandoc equivalent: dogs--in...
-        [TestCase("[HTML], [S5], or [RTF]?", "html-s5-or-rtf")]
-        [TestCase("3. Applications", "applications")]
-        [TestCase("33", "")]
-        public void TestUrilizeNonAscii_Pandoc(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, false));
-        }
+    [TestCase("Header identifiers in HTML", "header-identifiers-in-html")]
+    [TestCase("* Dogs*?--in *my* house?", "dogs-in-my-house")] // Not Pandoc equivalent: dogs--in...
+    [TestCase("[HTML], [S5], or [RTF]?", "html-s5-or-rtf")]
+    [TestCase("3. Applications", "applications")]
+    [TestCase("33", "")]
+    public void TestUrilizeNonAscii_Pandoc(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, false));
+    }
 
-        [TestCase("Header identifiers in HTML", "header-identifiers-in-html")]
-        [TestCase("* Dogs*?--in *my* house?", "-dogs--in-my-house")]
-        [TestCase("[HTML], [S5], or [RTF]?", "html-s5-or-rtf")]
-        [TestCase("3. Applications", "3-applications")]
-        [TestCase("33", "33")]
-        public void TestUrilizeGfm(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.UrilizeAsGfm(input));
-        }
+    [TestCase("Header identifiers in HTML", "header-identifiers-in-html")]
+    [TestCase("* Dogs*?--in *my* house?", "-dogs--in-my-house")]
+    [TestCase("[HTML], [S5], or [RTF]?", "html-s5-or-rtf")]
+    [TestCase("3. Applications", "3-applications")]
+    [TestCase("33", "33")]
+    public void TestUrilizeGfm(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.UrilizeAsGfm(input));
+    }
 
-        [TestCase("abc", "abc")]
-        [TestCase("a-c", "a-c")]
-        [TestCase("a c", "a-c")]
-        [TestCase("a_c", "a_c")]
-        [TestCase("a.c", "a.c")]
-        [TestCase("a,c", "ac")]
-        [TestCase("a--", "a")] // Not Pandoc-equivalent: a--
-        [TestCase("a__", "a")] // Not Pandoc-equivalent: a__
-        [TestCase("a..", "a")] // Not Pandoc-equivalent: a..
-        [TestCase("a??", "a")]
-        [TestCase("a  ", "a")]
-        [TestCase("a--d", "a-d")]
-        [TestCase("a__d", "a_d")]
-        [TestCase("a??d", "ad")]
-        [TestCase("a  d", "a-d")]
-        [TestCase("a..d", "a.d")]
-        [TestCase("-bc", "bc")]
-        [TestCase("_bc", "bc")]
-        [TestCase(" bc", "bc")]
-        [TestCase("?bc", "bc")]
-        [TestCase(".bc", "bc")]
-        [TestCase("a-.-", "a")] // Not Pandoc equivalent: a-.-
-        public void TestUrilizeOnlyAscii_Simple(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, true));
-        }
+    [TestCase("abc", "abc")]
+    [TestCase("a-c", "a-c")]
+    [TestCase("a c", "a-c")]
+    [TestCase("a_c", "a_c")]
+    [TestCase("a.c", "a.c")]
+    [TestCase("a,c", "ac")]
+    [TestCase("a--", "a")] // Not Pandoc-equivalent: a--
+    [TestCase("a__", "a")] // Not Pandoc-equivalent: a__
+    [TestCase("a..", "a")] // Not Pandoc-equivalent: a..
+    [TestCase("a??", "a")]
+    [TestCase("a  ", "a")]
+    [TestCase("a--d", "a-d")]
+    [TestCase("a__d", "a_d")]
+    [TestCase("a??d", "ad")]
+    [TestCase("a  d", "a-d")]
+    [TestCase("a..d", "a.d")]
+    [TestCase("-bc", "bc")]
+    [TestCase("_bc", "bc")]
+    [TestCase(" bc", "bc")]
+    [TestCase("?bc", "bc")]
+    [TestCase(".bc", "bc")]
+    [TestCase("a-.-", "a")] // Not Pandoc equivalent: a-.-
+    public void TestUrilizeOnlyAscii_Simple(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, true));
+    }
 
-        [TestCase("bær", "br")]
-        [TestCase("bør", "br")]
-        [TestCase("bΘr", "br")]
-        [TestCase("四五", "")]
-        public void TestUrilizeOnlyAscii_NonAscii(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, true));
-        }
+    [TestCase("bær", "br")]
+    [TestCase("bør", "br")]
+    [TestCase("bΘr", "br")]
+    [TestCase("四五", "")]
+    public void TestUrilizeOnlyAscii_NonAscii(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, true));
+    }
 
-        [TestCase("bár", "bar")]
-        [TestCase("àrrivé", "arrive")]
-        public void TestUrilizeOnlyAscii_Normalization(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, true));
-        }
+    [TestCase("bár", "bar")]
+    [TestCase("àrrivé", "arrive")]
+    public void TestUrilizeOnlyAscii_Normalization(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, true));
+    }
 
-        [TestCase("123", "")]
-        [TestCase("1,-b", "b")]
-        [TestCase("b1,-", "b1")] // Not Pandoc equivalent: b1-
-        [TestCase("ab3", "ab3")]
-        [TestCase("ab3de", "ab3de")]
-        public void TestUrilizeOnlyAscii_Numeric(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, true));
-        }
+    [TestCase("123", "")]
+    [TestCase("1,-b", "b")]
+    [TestCase("b1,-", "b1")] // Not Pandoc equivalent: b1-
+    [TestCase("ab3", "ab3")]
+    [TestCase("ab3de", "ab3de")]
+    public void TestUrilizeOnlyAscii_Numeric(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, true));
+    }
 
-        [TestCase("一二三四五", "一二三四五")]
-        [TestCase("一,-b", "一-b")]
-        public void TestUrilizeNonAscii_NonAsciiNumeric(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, false));
-        }
+    [TestCase("一二三四五", "一二三四五")]
+    [TestCase("一,-b", "一-b")]
+    public void TestUrilizeNonAscii_NonAsciiNumeric(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, false));
+    }
 
-        [TestCase("bær", "bær")]
-        [TestCase("æ5el", "æ5el")]
-        [TestCase("-æ5el", "æ5el")]
-        [TestCase("-frø-", "frø")]
-        [TestCase("-fr-ø", "fr-ø")]
-        public void TestUrilizeNonAscii_Simple(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, false));
-        }
+    [TestCase("bær", "bær")]
+    [TestCase("æ5el", "æ5el")]
+    [TestCase("-æ5el", "æ5el")]
+    [TestCase("-frø-", "frø")]
+    [TestCase("-fr-ø", "fr-ø")]
+    public void TestUrilizeNonAscii_Simple(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, false));
+    }
 
-        // Just to be sure, test for characters expressly forbidden in URI fragments:
-        [TestCase("b#r", "br")]
-        [TestCase("b%r", "br")] // Invalid except as an escape character
-        [TestCase("b^r", "br")]
-        [TestCase("b[r", "br")]
-        [TestCase("b]r", "br")]
-        [TestCase("b{r", "br")]
-        [TestCase("b}r", "br")]
-        [TestCase("b<r", "br")]
-        [TestCase("b>r", "br")]
-        [TestCase(@"b\r", "br")]
-        [TestCase(@"b""r", "br")]
-        [TestCase(@"Requirement 😀", "requirement")]
-        public void TestUrilizeNonAscii_NonValidCharactersForFragments(string input, string expectedResult)
-        {
-            Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, false));
-        }
+    // Just to be sure, test for characters expressly forbidden in URI fragments:
+    [TestCase("b#r", "br")]
+    [TestCase("b%r", "br")] // Invalid except as an escape character
+    [TestCase("b^r", "br")]
+    [TestCase("b[r", "br")]
+    [TestCase("b]r", "br")]
+    [TestCase("b{r", "br")]
+    [TestCase("b}r", "br")]
+    [TestCase("b<r", "br")]
+    [TestCase("b>r", "br")]
+    [TestCase(@"b\r", "br")]
+    [TestCase(@"b""r", "br")]
+    [TestCase(@"Requirement 😀", "requirement")]
+    public void TestUrilizeNonAscii_NonValidCharactersForFragments(string input, string expectedResult)
+    {
+        Assert.AreEqual(expectedResult, LinkHelper.Urilize(input, false));
+    }
 
-        [Test]
-        public void TestUnicodeInDomainNameOfLinkReferenceDefinition()
-        {
-            TestParser.TestSpec("[Foo]\n\n[Foo]: http://ünicode.com", "<p><a href=\"http://xn--nicode-2ya.com\">Foo</a></p>");
-        }
+    [Test]
+    public void TestUnicodeInDomainNameOfLinkReferenceDefinition()
+    {
+        TestParser.TestSpec("[Foo]\n\n[Foo]: http://ünicode.com", "<p><a href=\"http://xn--nicode-2ya.com\">Foo</a></p>");
     }
 }

src/Markdig.Tests/TestLinkRewriter.cs

@@ -1,44 +1,40 @@
-using System;
-using System.IO;
 using Markdig.Parsers;
 using Markdig.Renderers;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestLinkRewriter
 {
-    public class TestLinkRewriter
+    [Test]
+    public void ReplacesRelativeLinks()
     {
-        [Test]
-        public void ReplacesRelativeLinks()
-        {
-            TestSpec(s => "abc" + s, "Link: [hello](/relative.jpg)", "abc/relative.jpg");
-            TestSpec(s => s + "xyz", "Link: [hello](relative.jpg)", "relative.jpgxyz");
-            TestSpec(null, "Link: [hello](relative.jpg)", "relative.jpg");
-            TestSpec(null, "Link: [hello](/relative.jpg)", "/relative.jpg");
-        }
+        TestSpec(s => "abc" + s, "Link: [hello](/relative.jpg)", "abc/relative.jpg");
+        TestSpec(s => s + "xyz", "Link: [hello](relative.jpg)", "relative.jpgxyz");
+        TestSpec(null, "Link: [hello](relative.jpg)", "relative.jpg");
+        TestSpec(null, "Link: [hello](/relative.jpg)", "/relative.jpg");
+    }
 
-        [Test]
-        public void ReplacesRelativeImageSources()
-        {
-            TestSpec(s => "abc" + s, "Image: ![alt text](/image.jpg)", "abc/image.jpg");
-            TestSpec(s => "abc" + s, "Image: ![alt text](image.jpg \"title\")", "abcimage.jpg");
-            TestSpec(null, "Image: ![alt text](/image.jpg)", "/image.jpg");
-        }
+    [Test]
+    public void ReplacesRelativeImageSources()
+    {
+        TestSpec(s => "abc" + s, "Image: ![alt text](/image.jpg)", "abc/image.jpg");
+        TestSpec(s => "abc" + s, "Image: ![alt text](image.jpg \"title\")", "abcimage.jpg");
+        TestSpec(null, "Image: ![alt text](/image.jpg)", "/image.jpg");
+    }
 
-        public static void TestSpec(Func<string,string> linkRewriter, string markdown, string expectedLink)
-        {
-            var pipeline = new MarkdownPipelineBuilder().Build();
+    public static void TestSpec(Func<string,string> linkRewriter, string markdown, string expectedLink)
+    {
+        var pipeline = new MarkdownPipelineBuilder().Build();
 
-            var writer = new StringWriter();
-            var renderer = new HtmlRenderer(writer);
-            renderer.LinkRewriter = linkRewriter;
-            pipeline.Setup(renderer);
+        var writer = new StringWriter();
+        var renderer = new HtmlRenderer(writer);
+        renderer.LinkRewriter = linkRewriter;
+        pipeline.Setup(renderer);
 
-            var document = MarkdownParser.Parse(markdown, pipeline);
-            renderer.Render(document);
-            writer.Flush();
+        var document = MarkdownParser.Parse(markdown, pipeline);
+        renderer.Render(document);
+        writer.Flush();
 
-            Assert.That(writer.ToString(), Contains.Substring("=\"" + expectedLink + "\""));
-        }
+        Assert.That(writer.ToString(), Contains.Substring("=\"" + expectedLink + "\""));
     }
 }

src/Markdig.Tests/TestMarkdigCoreApi.cs

@@ -1,217 +1,214 @@
 using Markdig.Renderers;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
-using NUnit.Framework;
-using System.IO;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestMarkdigCoreApi
 {
-    public class TestMarkdigCoreApi
+    [Test]
+    public void TestToHtml()
     {
-        [Test]
-        public void TestToHtml()
+        for (int i = 0; i < 5; i++)
         {
-            for (int i = 0; i < 5; i++)
-            {
-                string html = Markdown.ToHtml("This is a text with some *emphasis*");
-                Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
+            string html = Markdown.ToHtml("This is a text with some *emphasis*");
+            Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
 
-                html = Markdown.ToHtml("This is a text with a https://link.tld/");
-                Assert.AreNotEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
-            }
+            html = Markdown.ToHtml("This is a text with a https://link.tld/");
+            Assert.AreNotEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
+        }
+    }
+
+    [Test]
+    public void TestToHtmlWithPipeline()
+    {
+        var pipeline = new MarkdownPipelineBuilder()
+            .Build();
+
+        for (int i = 0; i < 5; i++)
+        {
+            string html = Markdown.ToHtml("This is a text with some *emphasis*", pipeline);
+            Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
+
+            html = Markdown.ToHtml("This is a text with a https://link.tld/", pipeline);
+            Assert.AreNotEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
         }
 
-        [Test]
-        public void TestToHtmlWithPipeline()
+        pipeline = new MarkdownPipelineBuilder()
+            .UseAdvancedExtensions()
+            .Build();
+
+        for (int i = 0; i < 5; i++)
         {
-            var pipeline = new MarkdownPipelineBuilder()
-                .Build();
+            string html = Markdown.ToHtml("This is a text with a https://link.tld/", pipeline);
+            Assert.AreEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
+        }
+    }
 
-            for (int i = 0; i < 5; i++)
-            {
-                string html = Markdown.ToHtml("This is a text with some *emphasis*", pipeline);
-                Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
+    [Test]
+    public void TestToHtmlWithWriter()
+    {
+        var writer = new StringWriter();
 
-                html = Markdown.ToHtml("This is a text with a https://link.tld/", pipeline);
-                Assert.AreNotEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
-            }
-
-            pipeline = new MarkdownPipelineBuilder()
-                .UseAdvancedExtensions()
-                .Build();
-
-            for (int i = 0; i < 5; i++)
-            {
-                string html = Markdown.ToHtml("This is a text with a https://link.tld/", pipeline);
-                Assert.AreEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
-            }
+        for (int i = 0; i < 5; i++)
+        {
+            _ = Markdown.ToHtml("This is a text with some *emphasis*", writer);
+            string html = writer.ToString();
+            Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
+            writer.GetStringBuilder().Length = 0;
         }
 
-        [Test]
-        public void TestToHtmlWithWriter()
+        writer = new StringWriter();
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseAdvancedExtensions()
+            .Build();
+
+        for (int i = 0; i < 5; i++)
+        {
+            _ = Markdown.ToHtml("This is a text with a https://link.tld/", writer, pipeline);
+            string html = writer.ToString();
+            Assert.AreEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
+            writer.GetStringBuilder().Length = 0;
+        }
+    }
+
+    [Test]
+    public void TestDocumentToHtmlWithWriter()
+    {
+        var writer = new StringWriter();
+
+        for (int i = 0; i < 5; i++)
+        {
+            MarkdownDocument document = Markdown.Parse("This is a text with some *emphasis*");
+            document.ToHtml(writer);
+            string html = writer.ToString();
+            Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
+            writer.GetStringBuilder().Length = 0;
+        }
+
+        writer = new StringWriter();
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseAdvancedExtensions()
+            .Build();
+
+        for (int i = 0; i < 5; i++)
+        {
+            MarkdownDocument document = Markdown.Parse("This is a text with a https://link.tld/", pipeline);
+            document.ToHtml(writer, pipeline);
+            string html = writer.ToString();
+            Assert.AreEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
+            writer.GetStringBuilder().Length = 0;
+        }
+    }
+
+    [Test]
+    public void TestConvert()
+    {
+        var writer = new StringWriter();
+        var renderer = new HtmlRenderer(writer);
+
+        for (int i = 0; i < 5; i++)
+        {
+            _ = Markdown.Convert("This is a text with some *emphasis*", renderer);
+            string html = writer.ToString();
+            Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
+            writer.GetStringBuilder().Length = 0;
+        }
+
+        writer = new StringWriter();
+        renderer = new HtmlRenderer(writer);
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseAdvancedExtensions()
+            .Build();
+
+        for (int i = 0; i < 5; i++)
+        {
+            _ = Markdown.Convert("This is a text with a https://link.tld/", renderer, pipeline);
+            string html = writer.ToString();
+            Assert.AreEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
+            writer.GetStringBuilder().Length = 0;
+        }
+    }
+
+    [Test]
+    public void TestParse()
+    {
+        const string markdown = "This is a text with some *emphasis*";
+
+        var pipeline = new MarkdownPipelineBuilder()
+            .UsePreciseSourceLocation()
+            .Build();
+
+        for (int i = 0; i < 5; i++)
+        {
+            MarkdownDocument document = Markdown.Parse(markdown, pipeline);
+
+            Assert.AreEqual(1, document.LineCount);
+            Assert.AreEqual(markdown.Length, document.Span.Length);
+            Assert.AreEqual(1, document.LineStartIndexes.Count);
+            Assert.AreEqual(0, document.LineStartIndexes[0]);
+
+            Assert.AreEqual(1, document.Count);
+            ParagraphBlock paragraph = document[0] as ParagraphBlock;
+            Assert.NotNull(paragraph);
+            Assert.AreEqual(markdown.Length, paragraph.Span.Length);
+            LiteralInline literal = paragraph.Inline.FirstChild as LiteralInline;
+            Assert.NotNull(literal);
+            Assert.AreEqual("This is a text with some ", literal.ToString());
+            EmphasisInline emphasis = literal.NextSibling as EmphasisInline;
+            Assert.NotNull(emphasis);
+            Assert.AreEqual("*emphasis*".Length, emphasis.Span.Length);
+            LiteralInline emphasisLiteral = emphasis.FirstChild as LiteralInline;
+            Assert.NotNull(emphasisLiteral);
+            Assert.AreEqual("emphasis", emphasisLiteral.ToString());
+            Assert.Null(emphasisLiteral.NextSibling);
+            Assert.Null(emphasis.NextSibling);
+        }
+    }
+
+    [Test]
+    public void TestNormalize()
+    {
+        for (int i = 0; i < 5; i++)
+        {
+            string normalized = Markdown.Normalize("Heading\n=======");
+            Assert.AreEqual("# Heading", normalized);
+        }
+    }
+
+    [Test]
+    public void TestNormalizeWithWriter()
+    {
+        for (int i = 0; i < 5; i++)
         {
             var writer = new StringWriter();
 
-            for (int i = 0; i < 5; i++)
-            {
-                _ = Markdown.ToHtml("This is a text with some *emphasis*", writer);
-                string html = writer.ToString();
-                Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
-                writer.GetStringBuilder().Length = 0;
-            }
-
-            writer = new StringWriter();
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseAdvancedExtensions()
-                .Build();
-
-            for (int i = 0; i < 5; i++)
-            {
-                _ = Markdown.ToHtml("This is a text with a https://link.tld/", writer, pipeline);
-                string html = writer.ToString();
-                Assert.AreEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
-                writer.GetStringBuilder().Length = 0;
-            }
+            _ = Markdown.Normalize("Heading\n=======", writer);
+            string normalized = writer.ToString();
+            Assert.AreEqual("# Heading", normalized);
         }
+    }
 
-        [Test]
-        public void TestDocumentToHtmlWithWriter()
+    [Test]
+    public void TestToPlainText()
+    {
+        for (int i = 0; i < 5; i++)
+        {
+            string plainText = Markdown.ToPlainText("*Hello*, [world](http://example.com)!");
+            Assert.AreEqual("Hello, world!\n", plainText);
+        }
+    }
+
+    [Test]
+    public void TestToPlainTextWithWriter()
+    {
+        for (int i = 0; i < 5; i++)
         {
             var writer = new StringWriter();
 
-            for (int i = 0; i < 5; i++)
-            {
-                MarkdownDocument document = Markdown.Parse("This is a text with some *emphasis*");
-                document.ToHtml(writer);
-                string html = writer.ToString();
-                Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
-                writer.GetStringBuilder().Length = 0;
-            }
-
-            writer = new StringWriter();
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseAdvancedExtensions()
-                .Build();
-
-            for (int i = 0; i < 5; i++)
-            {
-                MarkdownDocument document = Markdown.Parse("This is a text with a https://link.tld/", pipeline);
-                document.ToHtml(writer, pipeline);
-                string html = writer.ToString();
-                Assert.AreEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
-                writer.GetStringBuilder().Length = 0;
-            }
-        }
-
-        [Test]
-        public void TestConvert()
-        {
-            var writer = new StringWriter();
-            var renderer = new HtmlRenderer(writer);
-
-            for (int i = 0; i < 5; i++)
-            {
-                _ = Markdown.Convert("This is a text with some *emphasis*", renderer);
-                string html = writer.ToString();
-                Assert.AreEqual("<p>This is a text with some <em>emphasis</em></p>\n", html);
-                writer.GetStringBuilder().Length = 0;
-            }
-
-            writer = new StringWriter();
-            renderer = new HtmlRenderer(writer);
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseAdvancedExtensions()
-                .Build();
-
-            for (int i = 0; i < 5; i++)
-            {
-                _ = Markdown.Convert("This is a text with a https://link.tld/", renderer, pipeline);
-                string html = writer.ToString();
-                Assert.AreEqual("<p>This is a text with a <a href=\"https://link.tld/\">https://link.tld/</a></p>\n", html);
-                writer.GetStringBuilder().Length = 0;
-            }
-        }
-
-        [Test]
-        public void TestParse()
-        {
-            const string markdown = "This is a text with some *emphasis*";
-
-            var pipeline = new MarkdownPipelineBuilder()
-                .UsePreciseSourceLocation()
-                .Build();
-
-            for (int i = 0; i < 5; i++)
-            {
-                MarkdownDocument document = Markdown.Parse(markdown, pipeline);
-
-                Assert.AreEqual(1, document.LineCount);
-                Assert.AreEqual(markdown.Length, document.Span.Length);
-                Assert.AreEqual(1, document.LineStartIndexes.Count);
-                Assert.AreEqual(0, document.LineStartIndexes[0]);
-
-                Assert.AreEqual(1, document.Count);
-                ParagraphBlock paragraph = document[0] as ParagraphBlock;
-                Assert.NotNull(paragraph);
-                Assert.AreEqual(markdown.Length, paragraph.Span.Length);
-                LiteralInline literal = paragraph.Inline.FirstChild as LiteralInline;
-                Assert.NotNull(literal);
-                Assert.AreEqual("This is a text with some ", literal.ToString());
-                EmphasisInline emphasis = literal.NextSibling as EmphasisInline;
-                Assert.NotNull(emphasis);
-                Assert.AreEqual("*emphasis*".Length, emphasis.Span.Length);
-                LiteralInline emphasisLiteral = emphasis.FirstChild as LiteralInline;
-                Assert.NotNull(emphasisLiteral);
-                Assert.AreEqual("emphasis", emphasisLiteral.ToString());
-                Assert.Null(emphasisLiteral.NextSibling);
-                Assert.Null(emphasis.NextSibling);
-            }
-        }
-
-        [Test]
-        public void TestNormalize()
-        {
-            for (int i = 0; i < 5; i++)
-            {
-                string normalized = Markdown.Normalize("Heading\n=======");
-                Assert.AreEqual("# Heading", normalized);
-            }
-        }
-
-        [Test]
-        public void TestNormalizeWithWriter()
-        {
-            for (int i = 0; i < 5; i++)
-            {
-                var writer = new StringWriter();
-
-                _ = Markdown.Normalize("Heading\n=======", writer);
-                string normalized = writer.ToString();
-                Assert.AreEqual("# Heading", normalized);
-            }
-        }
-
-        [Test]
-        public void TestToPlainText()
-        {
-            for (int i = 0; i < 5; i++)
-            {
-                string plainText = Markdown.ToPlainText("*Hello*, [world](http://example.com)!");
-                Assert.AreEqual("Hello, world!\n", plainText);
-            }
-        }
-
-        [Test]
-        public void TestToPlainTextWithWriter()
-        {
-            for (int i = 0; i < 5; i++)
-            {
-                var writer = new StringWriter();
-
-                _ = Markdown.ToPlainText("*Hello*, [world](http://example.com)!", writer);
-                string plainText = writer.ToString();
-                Assert.AreEqual("Hello, world!\n", plainText);
-            }
+            _ = Markdown.ToPlainText("*Hello*, [world](http://example.com)!", writer);
+            string plainText = writer.ToString();
+            Assert.AreEqual("Hello, world!\n", plainText);
         }
     }
 }

src/Markdig.Tests/TestMediaLinks.cs

@@ -1,104 +1,112 @@
-using Markdig.Extensions.MediaLinks;
-using NUnit.Framework;
-using System;
 using System.Text.RegularExpressions;
 
-namespace Markdig.Tests
+using Markdig.Extensions.MediaLinks;
+
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestMediaLinks
 {
-    [TestFixture]
-    public class TestMediaLinks
+    private MarkdownPipeline GetPipeline(MediaOptions options = null)
     {
-        private MarkdownPipeline GetPipeline(MediaOptions options = null)
+        return new MarkdownPipelineBuilder()
+             .UseMediaLinks(options)
+             .Build();
+    }
+
+    private MarkdownPipeline GetPipelineWithBootstrap(MediaOptions options = null)
+    {
+        return new MarkdownPipelineBuilder()
+            .UseBootstrap()
+            .UseMediaLinks(options)
+            .Build();
+    }
+
+    [Test]
+    [TestCase("![static mp4](https://sample.com/video.mp4)", "<p><video width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"https://sample.com/video.mp4\"></source></video></p>\n")]
+    [TestCase("![static mp4](//sample.com/video.mp4)", "<p><video width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"//sample.com/video.mp4\"></source></video></p>\n")]
+    [TestCase(@"![youtube.com](https://www.youtube.com/watch?v=mswPy5bt3TQ)", "<p><iframe src=\"https://www.youtube.com/embed/mswPy5bt3TQ\" class=\"youtube\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
+    [TestCase("![yandex.ru](https://music.yandex.ru/album/411845/track/4402274)", "<p><iframe src=\"https://music.yandex.ru/iframe/#track/4402274/411845/\" class=\"yandex\" width=\"500\" height=\"281\" frameborder=\"0\"></iframe></p>\n")]
+    [TestCase("![vimeo](https://vimeo.com/8607834)", "<p><iframe src=\"https://player.vimeo.com/video/8607834\" class=\"vimeo\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
+    [TestCase("![ok.ru](https://ok.ru/video/26870090463)", "<p><iframe src=\"https://ok.ru/videoembed/26870090463\" class=\"odnoklassniki\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
+    [TestCase("![ok.ru](//ok.ru/video/26870090463)", "<p><iframe src=\"https://ok.ru/videoembed/26870090463\" class=\"odnoklassniki\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
+    public void TestBuiltInHosts(string markdown, string expected)
+    {
+        string html = Markdown.ToHtml(markdown, GetPipeline());
+        Assert.AreEqual(html, expected);
+    }
+
+    [TestCase("![static video relative path](./video.mp4)",
+        "<p><video width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"./video.mp4\"></source></video></p>\n")]
+    [TestCase("![static audio relative path](./audio.mp3)",
+        "<p><audio width=\"500\" controls=\"\"><source type=\"audio/mpeg\" src=\"./audio.mp3\"></source></audio></p>\n")]
+    public void TestBuiltInHostsWithRelativePaths(string markdown, string expected)
+    {
+        string html = Markdown.ToHtml(markdown, GetPipeline());
+        Assert.AreEqual(html, expected);
+    }
+    
+    private class TestHostProvider : IHostProvider
+    {
+        public string Class { get; } = "regex";
+        public bool AllowFullScreen { get; }
+
+        public bool TryHandle(Uri mediaUri, bool isSchemaRelative, out string iframeUrl)
         {
-            return new MarkdownPipelineBuilder()
-                 .UseMediaLinks(options)
-                 .Build();
+            iframeUrl = null;
+            var uri = isSchemaRelative ? "//" + mediaUri.GetComponents(UriComponents.AbsoluteUri & ~UriComponents.Scheme, UriFormat.UriEscaped) : mediaUri.ToString();
+            if (!matcher.IsMatch(uri))
+                return false;
+            iframeUrl = matcher.Replace(uri, replacement);
+            return true;
         }
 
-        private MarkdownPipeline GetPipelineWithBootstrap(MediaOptions options = null)
+        private Regex matcher;
+        private string replacement;
+
+        public TestHostProvider(string provider, string replace)
         {
-            return new MarkdownPipelineBuilder()
-                .UseBootstrap()
-                .UseMediaLinks(options)
-                .Build();
-        }
-
-        [Test]
-        [TestCase("![static mp4](https://sample.com/video.mp4)", "<p><video width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"https://sample.com/video.mp4\"></source></video></p>\n")]
-        [TestCase("![static mp4](//sample.com/video.mp4)", "<p><video width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"//sample.com/video.mp4\"></source></video></p>\n")]
-        [TestCase(@"![youtube.com](https://www.youtube.com/watch?v=mswPy5bt3TQ)", "<p><iframe src=\"https://www.youtube.com/embed/mswPy5bt3TQ\" class=\"youtube\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
-        [TestCase("![yandex.ru](https://music.yandex.ru/album/411845/track/4402274)", "<p><iframe src=\"https://music.yandex.ru/iframe/#track/4402274/411845/\" class=\"yandex\" width=\"500\" height=\"281\" frameborder=\"0\"></iframe></p>\n")]
-        [TestCase("![vimeo](https://vimeo.com/8607834)", "<p><iframe src=\"https://player.vimeo.com/video/8607834\" class=\"vimeo\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
-        [TestCase("![ok.ru](https://ok.ru/video/26870090463)", "<p><iframe src=\"https://ok.ru/videoembed/26870090463\" class=\"odnoklassniki\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
-        [TestCase("![ok.ru](//ok.ru/video/26870090463)", "<p><iframe src=\"https://ok.ru/videoembed/26870090463\" class=\"odnoklassniki\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
-        public void TestBuiltInHosts(string markdown, string expected)
-        {
-            string html = Markdown.ToHtml(markdown, GetPipeline());
-            Assert.AreEqual(html, expected);
-        }
-
-        private class TestHostProvider : IHostProvider
-        {
-            public string Class { get; } = "regex";
-            public bool AllowFullScreen { get; }
-
-            public bool TryHandle(Uri mediaUri, bool isSchemaRelative, out string iframeUrl)
-            {
-                iframeUrl = null;
-                var uri = isSchemaRelative ? "//" + mediaUri.GetComponents(UriComponents.AbsoluteUri & ~UriComponents.Scheme, UriFormat.UriEscaped) : mediaUri.ToString();
-                if (!matcher.IsMatch(uri))
-                    return false;
-                iframeUrl = matcher.Replace(uri, replacement);
-                return true;
-            }
-
-            private Regex matcher;
-            private string replacement;
-
-            public TestHostProvider(string provider, string replace)
-            {
-                matcher = new Regex(provider);
-                replacement = replace;
-            }
-        }
-
-        [Test]
-        [TestCase("![p1](https://sample.com/video.mp4)", "<p><iframe src=\"https://example.com/video.mp4\" class=\"regex\" width=\"500\" height=\"281\" frameborder=\"0\"></iframe></p>\n", @"^https?://sample.com/(.+)$", @"https://example.com/$1")]
-        [TestCase("![p1](//sample.com/video.mp4)", "<p><iframe src=\"https://example.com/video.mp4\" class=\"regex\" width=\"500\" height=\"281\" frameborder=\"0\"></iframe></p>\n", @"^//sample.com/(.+)$", @"https://example.com/$1")]
-        [TestCase("![p1](https://sample.com/video.mp4)", "<p><iframe src=\"https://example.com/video.mp4?token=aaabbb\" class=\"regex\" width=\"500\" height=\"281\" frameborder=\"0\"></iframe></p>\n", @"^https?://sample.com/(.+)$", @"https://example.com/$1?token=aaabbb")]
-        public void TestCustomHostProvider(string markdown, string expected, string provider, string replace)
-        {
-            string html = Markdown.ToHtml(markdown, GetPipeline(new MediaOptions
-            {
-                Hosts =
-                {
-                    new TestHostProvider(provider, replace),
-                }
-            }));
-            Assert.AreEqual(html, expected);
-        }
-
-        [Test]
-        [TestCase("![static mp4](//sample.com/video.mp4)", "<p><video width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"//sample.com/video.mp4\"></source></video></p>\n", "")]
-        [TestCase(@"![youtube.com](https://www.youtube.com/watch?v=mswPy5bt3TQ)", "<p><iframe src=\"https://www.youtube.com/embed/mswPy5bt3TQ\" class=\"youtube\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n", "")]
-        [TestCase("![static mp4](//sample.com/video.mp4)", "<p><video class=\"k\" width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"//sample.com/video.mp4\"></source></video></p>\n", "k")]
-        [TestCase(@"![youtube.com](https://www.youtube.com/watch?v=mswPy5bt3TQ)", "<p><iframe src=\"https://www.youtube.com/embed/mswPy5bt3TQ\" class=\"k youtube\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n", "k")]
-        public void TestCustomClass(string markdown, string expected, string klass)
-        {
-            string html = Markdown.ToHtml(markdown, GetPipeline(new MediaOptions
-            {
-                Class = klass,
-            }));
-            Assert.AreEqual(html, expected);
-        }
-
-        [Test]
-        [TestCase("![static mp4](//sample.com/video.mp4)", "<p><video class=\"img-fluid\" width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"//sample.com/video.mp4\"></source></video></p>\n")]
-        [TestCase(@"![youtube.com](https://www.youtube.com/watch?v=mswPy5bt3TQ)", "<p><iframe src=\"https://www.youtube.com/embed/mswPy5bt3TQ\" class=\"img-fluid youtube\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
-        public void TestWithBootstrap(string markdown, string expected)
-        {
-            string html = Markdown.ToHtml(markdown, GetPipelineWithBootstrap());
-            Assert.AreEqual(html, expected);
+            matcher = new Regex(provider);
+            replacement = replace;
         }
     }
+
+    [Test]
+    [TestCase("![p1](https://sample.com/video.mp4)", "<p><iframe src=\"https://example.com/video.mp4\" class=\"regex\" width=\"500\" height=\"281\" frameborder=\"0\"></iframe></p>\n", @"^https?://sample.com/(.+)$", @"https://example.com/$1")]
+    [TestCase("![p1](//sample.com/video.mp4)", "<p><iframe src=\"https://example.com/video.mp4\" class=\"regex\" width=\"500\" height=\"281\" frameborder=\"0\"></iframe></p>\n", @"^//sample.com/(.+)$", @"https://example.com/$1")]
+    [TestCase("![p1](https://sample.com/video.mp4)", "<p><iframe src=\"https://example.com/video.mp4?token=aaabbb\" class=\"regex\" width=\"500\" height=\"281\" frameborder=\"0\"></iframe></p>\n", @"^https?://sample.com/(.+)$", @"https://example.com/$1?token=aaabbb")]
+    public void TestCustomHostProvider(string markdown, string expected, string provider, string replace)
+    {
+        string html = Markdown.ToHtml(markdown, GetPipeline(new MediaOptions
+        {
+            Hosts =
+            {
+                new TestHostProvider(provider, replace),
+            }
+        }));
+        Assert.AreEqual(html, expected);
+    }
+
+    [Test]
+    [TestCase("![static mp4](//sample.com/video.mp4)", "<p><video width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"//sample.com/video.mp4\"></source></video></p>\n", "")]
+    [TestCase(@"![youtube.com](https://www.youtube.com/watch?v=mswPy5bt3TQ)", "<p><iframe src=\"https://www.youtube.com/embed/mswPy5bt3TQ\" class=\"youtube\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n", "")]
+    [TestCase("![static mp4](//sample.com/video.mp4)", "<p><video class=\"k\" width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"//sample.com/video.mp4\"></source></video></p>\n", "k")]
+    [TestCase(@"![youtube.com](https://www.youtube.com/watch?v=mswPy5bt3TQ)", "<p><iframe src=\"https://www.youtube.com/embed/mswPy5bt3TQ\" class=\"k youtube\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n", "k")]
+    public void TestCustomClass(string markdown, string expected, string klass)
+    {
+        string html = Markdown.ToHtml(markdown, GetPipeline(new MediaOptions
+        {
+            Class = klass,
+        }));
+        Assert.AreEqual(html, expected);
+    }
+
+    [Test]
+    [TestCase("![static mp4](//sample.com/video.mp4)", "<p><video class=\"img-fluid\" width=\"500\" height=\"281\" controls=\"\"><source type=\"video/mp4\" src=\"//sample.com/video.mp4\"></source></video></p>\n")]
+    [TestCase(@"![youtube.com](https://www.youtube.com/watch?v=mswPy5bt3TQ)", "<p><iframe src=\"https://www.youtube.com/embed/mswPy5bt3TQ\" class=\"img-fluid youtube\" width=\"500\" height=\"281\" frameborder=\"0\" allowfullscreen=\"\"></iframe></p>\n")]
+    public void TestWithBootstrap(string markdown, string expected)
+    {
+        string html = Markdown.ToHtml(markdown, GetPipelineWithBootstrap());
+        Assert.AreEqual(html, expected);
+    }
 }

src/Markdig.Tests/TestNewLine.cs

@@ -1,31 +1,28 @@
-using System.Linq;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestNewLine
 {
-    [TestFixture]
-    public class TestNewLine
+    [TestCase("a  \nb", "<p>a<br />\nb</p>\n")]
+    [TestCase("a\\\nb", "<p>a<br />\nb</p>\n")]
+    [TestCase("a `b\nc`", "<p>a <code>b c</code></p>\n")]
+    [TestCase("# Text A\nText B\n\n## Text C", "<h1>Text A</h1>\n<p>Text B</p>\n<h2>Text C</h2>\n")]
+    public void Test(string value, string expectedHtml)
     {
-        [TestCase("a  \nb", "<p>a<br />\nb</p>\n")]
-        [TestCase("a\\\nb", "<p>a<br />\nb</p>\n")]
-        [TestCase("a `b\nc`", "<p>a <code>b c</code></p>\n")]
-        [TestCase("# Text A\nText B\n\n## Text C", "<h1>Text A</h1>\n<p>Text B</p>\n<h2>Text C</h2>\n")]
-        public void Test(string value, string expectedHtml)
-        {
-            Assert.AreEqual(expectedHtml, Markdown.ToHtml(value));
-            Assert.AreEqual(expectedHtml, Markdown.ToHtml(value.Replace("\n", "\r\n")));
-        }
+        Assert.AreEqual(expectedHtml, Markdown.ToHtml(value));
+        Assert.AreEqual(expectedHtml, Markdown.ToHtml(value.Replace("\n", "\r\n")));
+    }
 
-        [Test()]
-        public void TestEscapeLineBreak()
-        {
-            var input = "test\\\r\ntest1\r\n";
-            var doc = Markdown.Parse(input);
-            var inlines = doc.Descendants<LineBreakInline>().ToList();
-            Assert.AreEqual(1, inlines.Count, "Invalid number of LineBreakInline");
-            Assert.True(inlines[0].IsBackslash);
-        }
+    [Test()]
+    public void TestEscapeLineBreak()
+    {
+        var input = "test\\\r\ntest1\r\n";
+        var doc = Markdown.Parse(input);
+        var inlines = doc.Descendants<LineBreakInline>().ToList();
+        Assert.AreEqual(1, inlines.Count, "Invalid number of LineBreakInline");
+        Assert.True(inlines[0].IsBackslash);
     }
 }

src/Markdig.Tests/TestNormalize.cs

@@ -2,180 +2,187 @@
 // This file is licensed under the BSD-Clause 2 license.
 // See the license.txt file in the project root for more information.
 
-using System;
-using NUnit.Framework;
+using Markdig.Helpers;
+using Markdig.Renderers.Normalize;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
-using System.IO;
-using Markdig.Renderers.Normalize;
-using Markdig.Helpers;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestNormalize
 {
-    [TestFixture]
-    public class TestNormalize
+    [Test]
+    public void SyntaxCodeBlock()
     {
-        [Test]
-        public void SyntaxCodeBlock()
+        AssertSyntax("````csharp\npublic void HelloWorld()\n{\n}\n````", new FencedCodeBlock(null)
         {
-            AssertSyntax("````csharp\npublic void HelloWorld()\n{\n}\n````", new FencedCodeBlock(null)
+            FencedChar = '`',
+            OpeningFencedCharCount = 4,
+            ClosingFencedCharCount = 4,
+            Info = "csharp",
+            Lines = new StringLineGroup(4)
             {
-                FencedChar = '`',
-                OpeningFencedCharCount = 4,
-                ClosingFencedCharCount = 4,
-                Info = "csharp",
-                Lines = new StringLineGroup(4)
-                {
-                    new StringSlice("public void HelloWorld()"),
-                    new StringSlice("{"),
-                    new StringSlice("}"),
-                }
-            });
+                new StringSlice("public void HelloWorld()"),
+                new StringSlice("{"),
+                new StringSlice("}"),
+            }
+        });
 
-            AssertSyntax("    public void HelloWorld()\n    {\n    }", new CodeBlock(null)
+        AssertSyntax("    public void HelloWorld()\n    {\n    }", new CodeBlock(null)
+        {
+            Lines = new StringLineGroup(4)
             {
-                Lines = new StringLineGroup(4)
-                {
-                    new StringSlice("public void HelloWorld()"),
-                    new StringSlice("{"),
-                    new StringSlice("}"),
-                }
-            });
-        }
+                new StringSlice("public void HelloWorld()"),
+                new StringSlice("{"),
+                new StringSlice("}"),
+            }
+        });
+    }
 
-        [Test]
-        public void SyntaxHeadline()
+    [Test]
+    public void SyntaxHeadline()
+    {
+        AssertSyntax("## Headline", new HeadingBlock(null)
         {
-            AssertSyntax("## Headline", new HeadingBlock(null)
-            {
-                HeaderChar = '#',
-                Level = 2,
-                Inline = new ContainerInline().AppendChild(new LiteralInline("Headline")),
-            });
-        }
+            HeaderChar = '#',
+            Level = 2,
+            Inline = new ContainerInline().AppendChild(new LiteralInline("Headline")),
+        });
+    }
 
-        [Test]
-        public void SyntaxParagraph()
+    [Test]
+    public void SyntaxHeadlineLevel7()
+    {
+        AssertSyntax("####### Headline", new HeadingBlock(null) {
+            HeaderChar = '#',
+            Level = 7,
+            Inline = new ContainerInline().AppendChild(new LiteralInline("Headline")),
+        });
+    }
+
+    [Test]
+    public void SyntaxParagraph()
+    {
+        AssertSyntax("This is a normal paragraph", new ParagraphBlock()
         {
-            AssertSyntax("This is a normal paragraph", new ParagraphBlock()
-            {
-                Inline = new ContainerInline()
-                    .AppendChild(new LiteralInline("This is a normal paragraph")),
-            });
+            Inline = new ContainerInline()
+                .AppendChild(new LiteralInline("This is a normal paragraph")),
+        });
 
-            AssertSyntax("This is a\nnormal\nparagraph", new ParagraphBlock()
-            {
-                Inline = new ContainerInline()
-                    .AppendChild(new LiteralInline("This is a"))
-                    .AppendChild(new LineBreakInline())
-                    .AppendChild(new LiteralInline("normal"))
-                    .AppendChild(new LineBreakInline())
-                    .AppendChild(new LiteralInline("paragraph")),
-            });
-        }
-
-        [Test]
-        public void CodeBlock()
+        AssertSyntax("This is a\nnormal\nparagraph", new ParagraphBlock()
         {
-            AssertNormalizeNoTrim("    public void HelloWorld();\n    {\n    }");
-            AssertNormalizeNoTrim("    public void HelloWorld();\n    {\n    }\n\ntext after two newlines");
-            AssertNormalizeNoTrim("````\npublic void HelloWorld();\n{\n}\n````\n\ntext after two newlines");
-            AssertNormalizeNoTrim("````csharp\npublic void HelloWorld();\n{\n}\n````");
-            AssertNormalizeNoTrim("````csharp hideNewKeyword=true\npublic void HelloWorld();\n{\n}\n````");
-        }
+            Inline = new ContainerInline()
+                .AppendChild(new LiteralInline("This is a"))
+                .AppendChild(new LineBreakInline())
+                .AppendChild(new LiteralInline("normal"))
+                .AppendChild(new LineBreakInline())
+                .AppendChild(new LiteralInline("paragraph")),
+        });
+    }
 
-        [Test]
-        public void Heading()
-        {
-            AssertNormalizeNoTrim("# Heading");
-            AssertNormalizeNoTrim("## Heading");
-            AssertNormalizeNoTrim("### Heading");
-            AssertNormalizeNoTrim("#### Heading");
-            AssertNormalizeNoTrim("##### Heading");
-            AssertNormalizeNoTrim("###### Heading");
-            AssertNormalizeNoTrim("###### Heading\n\ntext after two newlines");
-            AssertNormalizeNoTrim("# Heading\nAnd Text1\n\nAndText2", options: new NormalizeOptions() { EmptyLineAfterHeading = false });
+    [Test]
+    public void CodeBlock()
+    {
+        AssertNormalizeNoTrim("    public void HelloWorld();\n    {\n    }");
+        AssertNormalizeNoTrim("    public void HelloWorld();\n    {\n    }\n\ntext after two newlines");
+        AssertNormalizeNoTrim("````\npublic void HelloWorld();\n{\n}\n````\n\ntext after two newlines");
+        AssertNormalizeNoTrim("````csharp\npublic void HelloWorld();\n{\n}\n````");
+        AssertNormalizeNoTrim("````csharp hideNewKeyword=true\npublic void HelloWorld();\n{\n}\n````");
+    }
 
-            AssertNormalizeNoTrim("Heading\n=======\n\ntext after two newlines", "# Heading\n\ntext after two newlines");
-        }
+    [Test]
+    public void Heading()
+    {
+        AssertNormalizeNoTrim("# Heading");
+        AssertNormalizeNoTrim("## Heading");
+        AssertNormalizeNoTrim("### Heading");
+        AssertNormalizeNoTrim("#### Heading");
+        AssertNormalizeNoTrim("##### Heading");
+        AssertNormalizeNoTrim("###### Heading");
+        AssertNormalizeNoTrim("###### Heading\n\ntext after two newlines");
+        AssertNormalizeNoTrim("# Heading\nAnd Text1\n\nAndText2", options: new NormalizeOptions() { EmptyLineAfterHeading = false });
 
-        [Test]
-        public void Backslash()
-        {
-            AssertNormalizeNoTrim("This is a hardline  \nAnd this is another hardline\\\nThis is standard newline");
-            AssertNormalizeNoTrim("This is a line\nWith another line\nAnd a last line");
-        }
+        AssertNormalizeNoTrim("Heading\n=======\n\ntext after two newlines", "# Heading\n\ntext after two newlines");
+    }
 
-        [Test]
-        public void HtmlBlock()
-        {
-            /*AssertNormalizeNoTrim(@"<div id=""foo"" class=""bar
-  baz"">
+    [Test]
+    public void Backslash()
+    {
+        AssertNormalizeNoTrim("This is a hardline  \nAnd this is another hardline\\\nThis is standard newline");
+        AssertNormalizeNoTrim("This is a line\nWith another line\nAnd a last line");
+    }
+
+    [Test]
+    public void HtmlBlock()
+    {
+        /*AssertNormalizeNoTrim(@"<div id=""foo"" class=""bar
+baz"">
 </ div >");*/ // TODO: Bug: Throws Exception during emit
-        }
+    }
 
-        [Test]
-        public void Paragraph()
-        {
-            AssertNormalizeNoTrim("This is a plain paragraph");
-            AssertNormalizeNoTrim(@"This
+    [Test]
+    public void Paragraph()
+    {
+        AssertNormalizeNoTrim("This is a plain paragraph");
+        AssertNormalizeNoTrim(@"This
 is
 a
 plain
 paragraph");
-        }
+    }
 
-        [Test]
-        public void ParagraphMulti()
-        {
-            AssertNormalizeNoTrim(@"line1
+    [Test]
+    public void ParagraphMulti()
+    {
+        AssertNormalizeNoTrim(@"line1
 
 line2
 
 line3");
-        }
+    }
 
-        [Test]
-        public void ListUnordered()
-        {
-            AssertNormalizeNoTrim(@"- a
+    [Test]
+    public void ListUnordered()
+    {
+        AssertNormalizeNoTrim(@"- a
 - b
 - c");
-        }
+    }
 
-        [Test]
-        public void ListUnorderedLoose()
-        {
-            AssertNormalizeNoTrim(@"- a
+    [Test]
+    public void ListUnorderedLoose()
+    {
+        AssertNormalizeNoTrim(@"- a
 
 - b
 
 - c");
-        }
+    }
 
-        [Test]
-        public void ListOrderedLooseAndCodeBlock()
-        {
-            AssertNormalizeNoTrim(@"1. ```
+    [Test]
+    public void ListOrderedLooseAndCodeBlock()
+    {
+        AssertNormalizeNoTrim(@"1. ```
    foo
    ```
    
    bar");
-        }
+    }
 
-        [Test, Ignore("Not sure this is the correct normalize for this one. Need to check the specs")]
-        public void ListUnorderedLooseTop()
-        {
-            AssertNormalizeNoTrim(@"* foo
+    [Test, Ignore("Not sure this is the correct normalize for this one. Need to check the specs")]
+    public void ListUnorderedLooseTop()
+    {
+        AssertNormalizeNoTrim(@"* foo
   * bar
   
   baz", options: new NormalizeOptions() { ListItemCharacter = '*' });
-        }
+    }
 
-        [Test]
-        public void ListUnorderedLooseMultiParagraph()
-        {
-            AssertNormalizeNoTrim(
+    [Test]
+    public void ListUnorderedLooseMultiParagraph()
+    {
+        AssertNormalizeNoTrim(
 @"- a
   
   And another paragraph a
@@ -185,22 +192,22 @@ line3");
   And another paragraph b
 
 - c");
-        }
+    }
 
 
-        [Test]
-        public void ListOrdered()
-        {
-            AssertNormalizeNoTrim(@"1. a
+    [Test]
+    public void ListOrdered()
+    {
+        AssertNormalizeNoTrim(@"1. a
 2. b
 3. c");
-        }
+    }
 
 
-        [Test]
-        public void ListOrderedAndIntended()
-        {
-            AssertNormalizeNoTrim(@"1. a
+    [Test]
+    public void ListOrderedAndIntended()
+    {
+        AssertNormalizeNoTrim(@"1. a
 2. b
    - foo
    - bar
@@ -218,169 +225,169 @@ line3");
     - Bar
 11. c
 12. c");
-        }
+    }
 
-        [Test]
-        public void HeaderAndParagraph()
-        {
-            AssertNormalizeNoTrim(@"# heading
+    [Test]
+    public void HeaderAndParagraph()
+    {
+        AssertNormalizeNoTrim(@"# heading
 
 paragraph
 
 paragraph2 without newlines");
-        }
+    }
 
 
-        [Test]
-        public void QuoteBlock()
-        {
-            AssertNormalizeNoTrim(@"> test1
+    [Test]
+    public void QuoteBlock()
+    {
+        AssertNormalizeNoTrim(@"> test1
 > 
 > test2");
 
-            AssertNormalizeNoTrim(@"> test1
+        AssertNormalizeNoTrim(@"> test1
 This is a continuation
 > test2",
-                @"> test1
+            @"> test1
 > This is a continuation
 > test2"
 );
 
-            AssertNormalizeNoTrim(@"> test1
+        AssertNormalizeNoTrim(@"> test1
 > -foobar
 
 asdf
 
 > test2
 > -foobar sen.");
-        }
+    }
 
-        [Test]
-        public void ThematicBreak()
-        {
-            AssertNormalizeNoTrim("***\n");
+    [Test]
+    public void ThematicBreak()
+    {
+        AssertNormalizeNoTrim("***\n");
 
-            AssertNormalizeNoTrim("* * *\n", "***\n");
-        }
+        AssertNormalizeNoTrim("* * *\n", "***\n");
+    }
 
-        [Test]
-        public void AutolinkInline()
-        {
-            AssertNormalizeNoTrim("This has a <auto.link.com>");
-        }
+    [Test]
+    public void AutolinkInline()
+    {
+        AssertNormalizeNoTrim("This has a <auto.link.com>");
+    }
 
-        [Test]
-        public void CodeInline()
-        {
-            AssertNormalizeNoTrim("This has a ` ` in it");
-            AssertNormalizeNoTrim("This has a `HelloWorld()` in it");
-            AssertNormalizeNoTrim(@"This has a ``Hello`World()`` in it");
-            AssertNormalizeNoTrim(@"This has a ``` Hello`World() ``` in it", @"This has a ``Hello`World()`` in it");
-            AssertNormalizeNoTrim(@"This has a ``Hello`World()` `` in it");
-            AssertNormalizeNoTrim(@"This has a ```` ``Hello```World()` ```` in it");
-            AssertNormalizeNoTrim(@"This has a `` `Hello`World()`` in it");
-            AssertNormalizeNoTrim(@"This has a ``` ``Hello`World()` ``` in it");
-        }
+    [Test]
+    public void CodeInline()
+    {
+        AssertNormalizeNoTrim("This has a ` ` in it");
+        AssertNormalizeNoTrim("This has a `HelloWorld()` in it");
+        AssertNormalizeNoTrim(@"This has a ``Hello`World()`` in it");
+        AssertNormalizeNoTrim(@"This has a ``` Hello`World() ``` in it", @"This has a ``Hello`World()`` in it");
+        AssertNormalizeNoTrim(@"This has a ``Hello`World()` `` in it");
+        AssertNormalizeNoTrim(@"This has a ```` ``Hello```World()` ```` in it");
+        AssertNormalizeNoTrim(@"This has a `` `Hello`World()`` in it");
+        AssertNormalizeNoTrim(@"This has a ``` ``Hello`World()` ``` in it");
+    }
 
-        [Test]
-        public void EmphasisInline()
-        {
-            AssertNormalizeNoTrim("This is a plain **paragraph**");
-            AssertNormalizeNoTrim("This is a plain *paragraph*");
-            AssertNormalizeNoTrim("This is a plain _paragraph_");
-            AssertNormalizeNoTrim("This is a plain __paragraph__");
-            AssertNormalizeNoTrim("This is a pl*ai*n **paragraph**");
-        }
+    [Test]
+    public void EmphasisInline()
+    {
+        AssertNormalizeNoTrim("This is a plain **paragraph**");
+        AssertNormalizeNoTrim("This is a plain *paragraph*");
+        AssertNormalizeNoTrim("This is a plain _paragraph_");
+        AssertNormalizeNoTrim("This is a plain __paragraph__");
+        AssertNormalizeNoTrim("This is a pl*ai*n **paragraph**");
+    }
 
-        [Test]
-        public void LineBreakInline()
-        {
-            AssertNormalizeNoTrim("normal\nline break");
-            AssertNormalizeNoTrim("hard  \nline break");
-            AssertNormalizeNoTrim("This is a hardline  \nAnd this is another hardline\\\nThis is standard newline");
-            AssertNormalizeNoTrim("This is a line\nWith another line\nAnd a last line");
-        }
+    [Test]
+    public void LineBreakInline()
+    {
+        AssertNormalizeNoTrim("normal\nline break");
+        AssertNormalizeNoTrim("hard  \nline break");
+        AssertNormalizeNoTrim("This is a hardline  \nAnd this is another hardline\\\nThis is standard newline");
+        AssertNormalizeNoTrim("This is a line\nWith another line\nAnd a last line");
+    }
 
-        [Test]
-        public void LinkInline()
-        {
-            AssertNormalizeNoTrim("This is a [link](http://company.com)");
-            AssertNormalizeNoTrim("This is an ![image](http://company.com)");
+    [Test]
+    public void LinkInline()
+    {
+        AssertNormalizeNoTrim("This is a [link](http://company.com)");
+        AssertNormalizeNoTrim("This is an ![image](http://company.com)");
 
-            AssertNormalizeNoTrim(@"This is a [link](http://company.com ""Crazy Company"")");
-            AssertNormalizeNoTrim(@"This is a [link](http://company.com ""Crazy \"" Company"")");
-        }
+        AssertNormalizeNoTrim(@"This is a [link](http://company.com ""Crazy Company"")");
+        AssertNormalizeNoTrim(@"This is a [link](http://company.com ""Crazy \"" Company"")");
+    }
 
-        [Test]
-        public void LinkReferenceDefinition()
-        {
-            // Full link
-            AssertNormalizeNoTrim("This is a [link][MyLink]\n\n[MyLink]: http://company.com");
+    [Test]
+    public void LinkReferenceDefinition()
+    {
+        // Full link
+        AssertNormalizeNoTrim("This is a [link][MyLink]\n\n[MyLink]: http://company.com");
 
-            AssertNormalizeNoTrim("[MyLink]: http://company.com\nThis is a [link][MyLink]",
-                "This is a [link][MyLink]\n\n[MyLink]: http://company.com");
+        AssertNormalizeNoTrim("[MyLink]: http://company.com\nThis is a [link][MyLink]",
+            "This is a [link][MyLink]\n\n[MyLink]: http://company.com");
 
-            AssertNormalizeNoTrim("This is a [link][MyLink] a normal link [link](http://google.com) and another def link [link2][MyLink2]\n\n[MyLink]: http://company.com\n[MyLink2]: http://company2.com");
+        AssertNormalizeNoTrim("This is a [link][MyLink] a normal link [link](http://google.com) and another def link [link2][MyLink2]\n\n[MyLink]: http://company.com\n[MyLink2]: http://company2.com");
 
-            // Collapsed link
-            AssertNormalizeNoTrim("This is a [link][]\n\n[link]: http://company.com");
+        // Collapsed link
+        AssertNormalizeNoTrim("This is a [link][]\n\n[link]: http://company.com");
 
-            // Shortcut link
-            AssertNormalizeNoTrim("This is a [link]\n\n[link]: http://company.com");
-        }
+        // Shortcut link
+        AssertNormalizeNoTrim("This is a [link]\n\n[link]: http://company.com");
+    }
 
-        [Test]
-        public void EscapeInline()
-        {
-            AssertNormalizeNoTrim("This is an escape \\* with another \\[");
-        }
+    [Test]
+    public void EscapeInline()
+    {
+        AssertNormalizeNoTrim("This is an escape \\* with another \\[");
+    }
 
-        [Test]
-        public void HtmlEntityInline()
-        {
-            AssertNormalizeNoTrim("This is a &auml; blank");
-        }
+    [Test]
+    public void HtmlEntityInline()
+    {
+        AssertNormalizeNoTrim("This is a &auml; blank");
+    }
 
-        [Test]
-        public void HtmlInline()
-        {
-            AssertNormalizeNoTrim("foo <hr/> bar");
-            AssertNormalizeNoTrim(@"foo <hr foo=""bar""/> bar");
-        }
+    [Test]
+    public void HtmlInline()
+    {
+        AssertNormalizeNoTrim("foo <hr/> bar");
+        AssertNormalizeNoTrim(@"foo <hr foo=""bar""/> bar");
+    }
 
 
-        [Test]
-        public void SpaceBetweenNodes()
-        {
-            AssertNormalizeNoTrim("# Hello World\nFoobar is a better bar.",
-                                  "# Hello World\n\nFoobar is a better bar.");
-        }
+    [Test]
+    public void SpaceBetweenNodes()
+    {
+        AssertNormalizeNoTrim("# Hello World\nFoobar is a better bar.",
+                              "# Hello World\n\nFoobar is a better bar.");
+    }
 
-        [Test]
-        public void SpaceBetweenNodesEvenForHeadlines()
-        {
-            AssertNormalizeNoTrim("# Hello World\n## Chapter 1\nFoobar is a better bar.",
-                                  "# Hello World\n\n## Chapter 1\n\nFoobar is a better bar.");
-        }
+    [Test]
+    public void SpaceBetweenNodesEvenForHeadlines()
+    {
+        AssertNormalizeNoTrim("# Hello World\n## Chapter 1\nFoobar is a better bar.",
+                              "# Hello World\n\n## Chapter 1\n\nFoobar is a better bar.");
+    }
 
-        [Test]
-        public void SpaceRemoveAtStartAndEnd()
-        {
-            AssertNormalizeNoTrim("\n\n# Hello World\n## Chapter 1\nFoobar is a better bar.\n\n",
-                                  "# Hello World\n\n## Chapter 1\n\nFoobar is a better bar.");
-        }
+    [Test]
+    public void SpaceRemoveAtStartAndEnd()
+    {
+        AssertNormalizeNoTrim("\n\n# Hello World\n## Chapter 1\nFoobar is a better bar.\n\n",
+                              "# Hello World\n\n## Chapter 1\n\nFoobar is a better bar.");
+    }
 
-        [Test]
-        public void SpaceShortenBetweenNodes()
-        {
-            AssertNormalizeNoTrim("# Hello World\n\n\n\nFoobar is a better bar.",
-                                  "# Hello World\n\nFoobar is a better bar.");
-        }
+    [Test]
+    public void SpaceShortenBetweenNodes()
+    {
+        AssertNormalizeNoTrim("# Hello World\n\n\n\nFoobar is a better bar.",
+                              "# Hello World\n\nFoobar is a better bar.");
+    }
 
-        [Test]
-        public void BiggerSample()
-        {
-            var input = @"# Heading 1
+    [Test]
+    public void BiggerSample()
+    {
+        var input = @"# Heading 1
 
 This is a paragraph
 
@@ -400,100 +407,99 @@ This is a code block
     line 2 of indented
 
 This is a last line";
-            AssertNormalizeNoTrim(input);
-        }
+        AssertNormalizeNoTrim(input);
+    }
 
-        [Test]
-        public void TaskLists()
+    [Test]
+    public void TaskLists()
+    {
+        AssertNormalizeNoTrim("- [X] This is done");
+        AssertNormalizeNoTrim("- [x] This is done",
+                              "- [X] This is done");
+        AssertNormalizeNoTrim("- [ ] This is not done");
+
+        // ignore
+        AssertNormalizeNoTrim("[x] This is not a task list");
+        AssertNormalizeNoTrim("[ ] This is not a task list");
+    }
+
+    [Test]
+    public void JiraLinks()
+    {
+        AssertNormalizeNoTrim("FOO-1234");
+        AssertNormalizeNoTrim("AB-1");
+
+        AssertNormalizeNoTrim("**Hello World AB-1**");
+    }
+
+    [Test]
+    public void AutoLinks()
+    {
+        AssertNormalizeNoTrim("Hello from http://example.com/foo", "Hello from [http://example.com/foo](http://example.com/foo)", new NormalizeOptions() { ExpandAutoLinks = true, });
+        AssertNormalizeNoTrim("Hello from www.example.com/foo", "Hello from [www.example.com/foo](http://www.example.com/foo)", new NormalizeOptions() { ExpandAutoLinks = true, });
+        AssertNormalizeNoTrim("Hello from ftp://example.com", "Hello from [ftp://example.com](ftp://example.com)", new NormalizeOptions() { ExpandAutoLinks = true, });
+        AssertNormalizeNoTrim("Hello from mailto:hello@example.com", "Hello from [hello@example.com](mailto:hello@example.com)", new NormalizeOptions() { ExpandAutoLinks = true, });
+
+        AssertNormalizeNoTrim("Hello from http://example.com/foo", "Hello from http://example.com/foo", new NormalizeOptions() { ExpandAutoLinks = false, });
+        AssertNormalizeNoTrim("Hello from www.example.com/foo", "Hello from http://www.example.com/foo", new NormalizeOptions() { ExpandAutoLinks = false, });
+        AssertNormalizeNoTrim("Hello from mailto:hello@example.com", "Hello from mailto:hello@example.com", new NormalizeOptions() { ExpandAutoLinks = false, });
+    }
+
+    private static void AssertSyntax(string expected, MarkdownObject syntax)
+    {
+        var writer = new StringWriter();
+        var normalizer = new NormalizeRenderer(writer);
+        var document = new MarkdownDocument();
+        if (syntax is Block)
         {
-            AssertNormalizeNoTrim("- [X] This is done");
-            AssertNormalizeNoTrim("- [x] This is done",
-                                  "- [X] This is done");
-            AssertNormalizeNoTrim("- [ ] This is not done");
-
-            // ignore
-            AssertNormalizeNoTrim("[x] This is not a task list");
-            AssertNormalizeNoTrim("[ ] This is not a task list");
+            document.Add(syntax as Block);
         }
-
-        [Test]
-        public void JiraLinks()
+        else
         {
-            AssertNormalizeNoTrim("FOO-1234");
-            AssertNormalizeNoTrim("AB-1");
-
-            AssertNormalizeNoTrim("**Hello World AB-1**");
+            throw new InvalidOperationException();
         }
+        normalizer.Render(document);
 
-        [Test]
-        public void AutoLinks()
+        var actual = writer.ToString();
+
+        Assert.AreEqual(expected, actual);
+    }
+
+    public static void TestSpec(string inputText, string expectedOutputText, string extensions = null, string context = null)
+    {
+        foreach (var pipeline in TestParser.GetPipeline(extensions))
         {
-            AssertNormalizeNoTrim("Hello from http://example.com/foo", "Hello from [http://example.com/foo](http://example.com/foo)", new NormalizeOptions() { ExpandAutoLinks = true, });
-            AssertNormalizeNoTrim("Hello from www.example.com/foo", "Hello from [www.example.com/foo](http://www.example.com/foo)", new NormalizeOptions() { ExpandAutoLinks = true, });
-            AssertNormalizeNoTrim("Hello from ftp://example.com", "Hello from [ftp://example.com](ftp://example.com)", new NormalizeOptions() { ExpandAutoLinks = true, });
-            AssertNormalizeNoTrim("Hello from mailto:hello@example.com", "Hello from [hello@example.com](mailto:hello@example.com)", new NormalizeOptions() { ExpandAutoLinks = true, });
-
-            AssertNormalizeNoTrim("Hello from http://example.com/foo", "Hello from http://example.com/foo", new NormalizeOptions() { ExpandAutoLinks = false, });
-            AssertNormalizeNoTrim("Hello from www.example.com/foo", "Hello from http://www.example.com/foo", new NormalizeOptions() { ExpandAutoLinks = false, });
-            AssertNormalizeNoTrim("Hello from mailto:hello@example.com", "Hello from mailto:hello@example.com", new NormalizeOptions() { ExpandAutoLinks = false, });
-        }
-
-        private static void AssertSyntax(string expected, MarkdownObject syntax)
-        {
-            var writer = new StringWriter();
-            var normalizer = new NormalizeRenderer(writer);
-            var document = new MarkdownDocument();
-            if (syntax is Block)
-            {
-                document.Add(syntax as Block);
-            }
-            else
-            {
-                throw new InvalidOperationException();
-            }
-            normalizer.Render(document);
-
-            var actual = writer.ToString();
-
-            Assert.AreEqual(expected, actual);
-        }
-
-        public static void TestSpec(string inputText, string expectedOutputText, string extensions = null, string context = null)
-        {
-            foreach (var pipeline in TestParser.GetPipeline(extensions))
-            {
-                AssertNormalize(inputText, expectedOutputText, trim: false, pipeline: pipeline.Value, context: context);
-            }
-        }
-
-        public static void AssertNormalizeNoTrim(string input, string expected = null, NormalizeOptions options = null)
-            => AssertNormalize(input, expected, false, options);
-
-        public static void AssertNormalize(string input, string expected = null, bool trim = true, NormalizeOptions options = null, MarkdownPipeline pipeline = null, string context = null)
-        {
-            expected = expected ?? input;
-            input = NormText(input, trim);
-            expected = NormText(expected, trim);
-
-            pipeline = pipeline ?? new MarkdownPipelineBuilder()
-                .UseAutoLinks()
-                .UseJiraLinks(new Extensions.JiraLinks.JiraLinkOptions("https://jira.example.com"))
-                .UseTaskLists()
-                .Build();
-
-            var result = Markdown.Normalize(input, options, pipeline: pipeline);
-            result = NormText(result, trim);
-
-            TestParser.PrintAssertExpected(input, result, expected, context);
-        }
-
-        private static string NormText(string text, bool trim)
-        {
-            if (trim)
-            {
-                text = text.Trim();
-            }
-            return text.Replace("\r\n", "\n").Replace('\r', '\n');
+            AssertNormalize(inputText, expectedOutputText, trim: false, pipeline: pipeline.Value, context: context);
         }
     }
+
+    public static void AssertNormalizeNoTrim(string input, string expected = null, NormalizeOptions options = null)
+        => AssertNormalize(input, expected, false, options);
+
+    public static void AssertNormalize(string input, string expected = null, bool trim = true, NormalizeOptions options = null, MarkdownPipeline pipeline = null, string context = null)
+    {
+        expected = expected ?? input;
+        input = NormText(input, trim);
+        expected = NormText(expected, trim);
+
+        pipeline = pipeline ?? new MarkdownPipelineBuilder()
+            .UseAutoLinks()
+            .UseJiraLinks(new Extensions.JiraLinks.JiraLinkOptions("https://jira.example.com"))
+            .UseTaskLists()
+            .Build();
+
+        var result = Markdown.Normalize(input, options, pipeline: pipeline);
+        result = NormText(result, trim);
+
+        TestParser.PrintAssertExpected(input, result, expected, context);
+    }
+
+    private static string NormText(string text, bool trim)
+    {
+        if (trim)
+        {
+            text = text.Trim();
+        }
+        return text.Replace("\r\n", "\n").Replace('\r', '\n');
+    }
 }

src/Markdig.Tests/TestOrderedList.cs

@@ -1,43 +1,41 @@
-// Copyright (c) Alexandre Mutel. All rights reserved.
+// Copyright (c) Alexandre Mutel. All rights reserved.
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
 using Markdig.Helpers;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestOrderedList
 {
-    [TestFixture]
-    public class TestOrderedList
+    [Test]
+    public void TestReplace()
     {
-        [Test]
-        public void TestReplace()
+        var list = new OrderedList<ITest>
         {
-            var list = new OrderedList<ITest>
-            {
-                new A(),
-                new B(),
-                new C(),
-            };
+            new A(),
+            new B(),
+            new C(),
+        };
 
-            // Replacing B with D. Order should now be A, D, B.
-            var result = list.Replace<B>(new D());
-            Assert.That(result, Is.True);
-            Assert.That(list.Count, Is.EqualTo(3));
-            Assert.That(list[0], Is.InstanceOf<A>());
-            Assert.That(list[1], Is.InstanceOf<D>());
-            Assert.That(list[2], Is.InstanceOf<C>());
+        // Replacing B with D. Order should now be A, D, B.
+        var result = list.Replace<B>(new D());
+        Assert.That(result, Is.True);
+        Assert.That(list.Count, Is.EqualTo(3));
+        Assert.That(list[0], Is.InstanceOf<A>());
+        Assert.That(list[1], Is.InstanceOf<D>());
+        Assert.That(list[2], Is.InstanceOf<C>());
 
-            // Replacing B again should fail, as it's no longer in the list.
-            Assert.That(list.Replace<B>(new D()), Is.False);
-        }
-
-        #region Test fixtures
-        private interface ITest { }
-        private class A : ITest { }
-        private class B : ITest { }
-        private class C : ITest { }
-        private class D : ITest { }
-        #endregion
+        // Replacing B again should fail, as it's no longer in the list.
+        Assert.That(list.Replace<B>(new D()), Is.False);
     }
+
+    #region Test fixtures
+    private interface ITest { }
+    private class A : ITest { }
+    private class B : ITest { }
+    private class C : ITest { }
+    private class D : ITest { }
+    #endregion
 }

src/Markdig.Tests/TestParser.cs

@@ -1,191 +1,196 @@
 // Copyright (c) Alexandre Mutel. All rights reserved.
 // This file is licensed under the BSD-Clause 2 license.
 // See the license.txt file in the project root for more information.
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
 using System.Text;
 using System.Text.RegularExpressions;
+
 using Markdig.Extensions.JiraLinks;
+using Markdig.Renderers.Roundtrip;
 using Markdig.Syntax;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestParser
 {
-    public class TestParser
+    [Test]
+    public void EnsureSpecsAreUpToDate()
     {
-        [Test]
-        public void EnsureSpecsAreUpToDate()
+        // In CI, SpecFileGen is guaranteed to run
+        if (IsContinuousIntegration)
+            return;
+
+        var specsFilePaths = Directory.GetDirectories(TestsDirectory)
+            .Where(dir => dir.EndsWith("Specs"))
+            .SelectMany(dir => Directory.GetFiles(dir)
+                .Where(file => file.EndsWith(".md", StringComparison.OrdinalIgnoreCase))
+                .Where(file => file.IndexOf("readme", StringComparison.OrdinalIgnoreCase) == -1))
+            .ToArray();
+
+        var specsMarkdown = new string[specsFilePaths.Length];
+        var specsSyntaxTrees = new MarkdownDocument[specsFilePaths.Length];
+
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseAdvancedExtensions()
+            .Build();
+
+        for (int i = 0; i < specsFilePaths.Length; i++)
         {
-            // In CI, SpecFileGen is guaranteed to run
-            if (IsContinuousIntegration)
-                return;
-
-            var specsFilePaths = Directory.GetDirectories(TestsDirectory)
-                .Where(dir => dir.EndsWith("Specs"))
-                .SelectMany(dir => Directory.GetFiles(dir)
-                    .Where(file => file.EndsWith(".md", StringComparison.OrdinalIgnoreCase))
-                    .Where(file => file.IndexOf("readme", StringComparison.OrdinalIgnoreCase) == -1))
-                .ToArray();
-
-            var specsMarkdown = new string[specsFilePaths.Length];
-            var specsSyntaxTrees = new MarkdownDocument[specsFilePaths.Length];
-
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseAdvancedExtensions()
-                .Build();
-
-            for (int i = 0; i < specsFilePaths.Length; i++)
-            {
-                string markdown = specsMarkdown[i] = File.ReadAllText(specsFilePaths[i]);
-                specsSyntaxTrees[i] = Markdown.Parse(markdown, pipeline);
-            }
-
-            foreach (var specFilePath in specsFilePaths)
-            {
-                string testFilePath = Path.ChangeExtension(specFilePath, ".generated.cs");
-
-                Assert.True(File.Exists(testFilePath),
-                    "A new specification file has been added. Add the spec to the list in SpecFileGen and regenerate the tests.");
-
-                DateTime specTime = File.GetLastWriteTimeUtc(specFilePath);
-                DateTime testTime = File.GetLastWriteTimeUtc(testFilePath);
-
-                // If file creation times aren't preserved by git, add some leeway
-                // If specs have come from git, assume that they were regenerated since CI would fail otherwise
-                testTime = testTime.AddMinutes(3);
-
-                // This might not catch a changed spec every time, but should at least sometimes. Otherwise CI will catch it
-
-                // This could also trigger, if a user has modified the spec file but reverted the change - can't think of a good workaround
-                Assert.Less(specTime, testTime,
-                    $"{Path.GetFileName(specFilePath)} has been modified. Run SpecFileGen to regenerate the tests. " +
-                    "If you have modified a specification file, but reverted all changes, ignore this error or revert the 'changed' timestamp metadata on the file.");
-            }
-
-            TestDescendantsOrder.TestSchemas(specsSyntaxTrees);
+            string markdown = specsMarkdown[i] = File.ReadAllText(specsFilePaths[i]);
+            specsSyntaxTrees[i] = Markdown.Parse(markdown, pipeline);
         }
 
-        public static void TestSpec(string inputText, string expectedOutputText, string extensions = null, bool plainText = false, string context = null)
+        foreach (var specFilePath in specsFilePaths)
         {
-            context ??= string.Empty;
-            if (!string.IsNullOrEmpty(context))
-            {
-                context += "\n";
-            }
-            foreach (var pipeline in GetPipeline(extensions))
-            {
-                TestSpec(inputText, expectedOutputText, pipeline.Value, plainText, context: context + $"Pipeline configured with extensions: {pipeline.Key}");
-            }
+            string testFilePath = Path.ChangeExtension(specFilePath, ".generated.cs");
+
+            Assert.True(File.Exists(testFilePath),
+                "A new specification file has been added. Add the spec to the list in SpecFileGen and regenerate the tests.");
+
+            DateTime specTime = File.GetLastWriteTimeUtc(specFilePath);
+            DateTime testTime = File.GetLastWriteTimeUtc(testFilePath);
+
+            // If file creation times aren't preserved by git, add some leeway
+            // If specs have come from git, assume that they were regenerated since CI would fail otherwise
+            testTime = testTime.AddMinutes(3);
+
+            // This might not catch a changed spec every time, but should at least sometimes. Otherwise CI will catch it
+
+            // This could also trigger, if a user has modified the spec file but reverted the change - can't think of a good workaround
+            Assert.Less(specTime, testTime,
+                $"{Path.GetFileName(specFilePath)} has been modified. Run SpecFileGen to regenerate the tests. " +
+                "If you have modified a specification file, but reverted all changes, ignore this error or revert the 'changed' timestamp metadata on the file.");
         }
 
-        public static void TestSpec(string inputText, string expectedOutputText, MarkdownPipeline pipeline, bool plainText = false, string context = null)
+        TestDescendantsOrder.TestSchemas(specsSyntaxTrees);
+    }
+
+    [Test]
+    public void ParseEmptyDocumentWithTrackTriviaEnabled()
+    {
+        var document = Markdown.Parse("", trackTrivia: true);
+        using var sw = new StringWriter();
+        new RoundtripRenderer(sw).Render(document);
+        Assert.AreEqual("", sw.ToString());
+    }
+
+    public static void TestSpec(string inputText, string expectedOutputText, string extensions = null, bool plainText = false, string context = null)
+    {
+        context ??= string.Empty;
+        if (!string.IsNullOrEmpty(context))
         {
-            // Uncomment this line to get more debug information for process inlines.
-            //pipeline.DebugLog = Console.Out;
-            var result = plainText ? Markdown.ToPlainText(inputText, pipeline) : Markdown.ToHtml(inputText, pipeline);
-
-            result = Compact(result);
-            expectedOutputText = Compact(expectedOutputText);
-
-            PrintAssertExpected(inputText, result, expectedOutputText, context);
+            context += "\n";
         }
-
-        public static void PrintAssertExpected(string source, string result, string expected, string context = null)
+        foreach (var pipeline in GetPipeline(extensions))
         {
-            if (expected != result)
+            TestSpec(inputText, expectedOutputText, pipeline.Value, plainText, context: context + $"Pipeline configured with extensions: {pipeline.Key}");
+        }
+    }
+
+    public static void TestSpec(string inputText, string expectedOutputText, MarkdownPipeline pipeline, bool plainText = false, string context = null)
+    {
+        // Uncomment this line to get more debug information for process inlines.
+        //pipeline.DebugLog = Console.Out;
+        var result = plainText ? Markdown.ToPlainText(inputText, pipeline) : Markdown.ToHtml(inputText, pipeline);
+
+        result = Compact(result);
+        expectedOutputText = Compact(expectedOutputText);
+
+        PrintAssertExpected(inputText, result, expectedOutputText, context);
+    }
+
+    public static void PrintAssertExpected(string source, string result, string expected, string context = null)
+    {
+        if (expected != result)
+        {
+            if (context != null)
             {
-                if (context != null)
-                {
-                    Console.WriteLine(context);
-                }
-                Console.WriteLine("```````````````````Source");
-                Console.WriteLine(DisplaySpaceAndTabs(source));
-                Console.WriteLine("```````````````````Result");
-                Console.WriteLine(DisplaySpaceAndTabs(result));
-                Console.WriteLine("```````````````````Expected");
-                Console.WriteLine(DisplaySpaceAndTabs(expected));
-                Console.WriteLine("```````````````````");
-                Console.WriteLine();
-                TextAssert.AreEqual(expected, result);
+                Console.WriteLine(context);
             }
+            Console.WriteLine("```````````````````Source");
+            Console.WriteLine(DisplaySpaceAndTabs(source));
+            Console.WriteLine("```````````````````Result");
+            Console.WriteLine(DisplaySpaceAndTabs(result));
+            Console.WriteLine("```````````````````Expected");
+            Console.WriteLine(DisplaySpaceAndTabs(expected));
+            Console.WriteLine("```````````````````");
+            Console.WriteLine();
+            TextAssert.AreEqual(expected, result);
+        }
+    }
+
+    public static IEnumerable<KeyValuePair<string, MarkdownPipeline>> GetPipeline(string extensionsGroupText)
+    {
+        // For the standard case, we make sure that both the CommmonMark core and Extra/Advanced are CommonMark compliant!
+        if (string.IsNullOrEmpty(extensionsGroupText))
+        {
+            yield return new KeyValuePair<string, MarkdownPipeline>("default", new MarkdownPipelineBuilder().Build());
+
+            //yield return new KeyValuePair<string, MarkdownPipeline>("default-trivia", new MarkdownPipelineBuilder().EnableTrackTrivia().Build());
+
+            yield return new KeyValuePair<string, MarkdownPipeline>("advanced", new MarkdownPipelineBuilder()  // Use similar to advanced extension without auto-identifier
+             .UseAbbreviations()
+            //.UseAutoIdentifiers()
+            .UseCitations()
+            .UseCustomContainers()
+            .UseDefinitionLists()
+            .UseEmphasisExtras()
+            .UseFigures()
+            .UseFooters()
+            .UseFootnotes()
+            .UseGridTables()
+            .UseMathematics()
+            .UseMediaLinks()
+            .UsePipeTables()
+            .UseListExtras()
+            .UseGenericAttributes().Build());
+
+            yield break;
         }
 
-        public static IEnumerable<KeyValuePair<string, MarkdownPipeline>> GetPipeline(string extensionsGroupText)
+        var extensionGroups = extensionsGroupText.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
+        foreach (var extensionsText in extensionGroups)
         {
-            // For the standard case, we make sure that both the CommmonMark core and Extra/Advanced are CommonMark compliant!
-            if (string.IsNullOrEmpty(extensionsGroupText))
+            var builder = new MarkdownPipelineBuilder();
+            builder.DebugLog = Console.Out;
+            if (extensionsText == "jiralinks")
             {
-                yield return new KeyValuePair<string, MarkdownPipeline>("default", new MarkdownPipelineBuilder().Build());
-
-                //yield return new KeyValuePair<string, MarkdownPipeline>("default-trivia", new MarkdownPipelineBuilder().EnableTrackTrivia().Build());
-
-                yield return new KeyValuePair<string, MarkdownPipeline>("advanced", new MarkdownPipelineBuilder()  // Use similar to advanced extension without auto-identifier
-                 .UseAbbreviations()
-                //.UseAutoIdentifiers()
-                .UseCitations()
-                .UseCustomContainers()
-                .UseDefinitionLists()
-                .UseEmphasisExtras()
-                .UseFigures()
-                .UseFooters()
-                .UseFootnotes()
-                .UseGridTables()
-                .UseMathematics()
-                .UseMediaLinks()
-                .UsePipeTables()
-                .UseListExtras()
-                .UseGenericAttributes().Build());
-
-                yield break;
+                builder.UseJiraLinks(new JiraLinkOptions("http://your.company.abc"));
             }
-
-            var extensionGroups = extensionsGroupText.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
-            foreach (var extensionsText in extensionGroups)
+            else
             {
-                var builder = new MarkdownPipelineBuilder();
-                builder.DebugLog = Console.Out;
-                if (extensionsText == "jiralinks")
-                {
-                    builder.UseJiraLinks(new JiraLinkOptions("http://your.company.abc"));
-                }
-                else
-                {
-                    builder = extensionsText == "self" ? builder.UseSelfPipeline() : builder.Configure(extensionsText);
-                }
-                yield return new KeyValuePair<string, MarkdownPipeline>(extensionsText, builder.Build());
+                builder = extensionsText == "self" ? builder.UseSelfPipeline() : builder.Configure(extensionsText);
             }
+            yield return new KeyValuePair<string, MarkdownPipeline>(extensionsText, builder.Build());
         }
+    }
 
-        public static string DisplaySpaceAndTabs(string text)
+    public static string DisplaySpaceAndTabs(string text)
+    {
+        // Output special characters to check correctly the results
+        return text.Replace('\t', '→').Replace(' ', '·');
+    }
+
+    private static string Compact(string html)
+    {
+        // Normalize the output to make it compatible with CommonMark specs
+        html = html.Replace("\r\n", "\n").Replace(@"\r", @"\n").Trim();
+        html = Regex.Replace(html, @"\s+</li>", "</li>");
+        html = Regex.Replace(html, @"<li>\s+", "<li>");
+        html = html.Normalize(NormalizationForm.FormKD);
+        return html;
+    }
+
+    public static readonly bool IsContinuousIntegration = Environment.GetEnvironmentVariable("CI") != null;
+
+    public static readonly string TestsDirectory = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(typeof(TestParser).Assembly.Location), "../../.."));
+
+    static TestParser()
+    {
+        const string RunningInsideVisualStudioPath = "\\src\\.vs\\markdig\\";
+        int index = TestsDirectory.IndexOf(RunningInsideVisualStudioPath);
+        if (index != -1)
         {
-            // Output special characters to check correctly the results
-            return text.Replace('\t', '→').Replace(' ', '·');
-        }
-
-        private static string Compact(string html)
-        {
-            // Normalize the output to make it compatible with CommonMark specs
-            html = html.Replace("\r\n", "\n").Replace(@"\r", @"\n").Trim();
-            html = Regex.Replace(html, @"\s+</li>", "</li>");
-            html = Regex.Replace(html, @"<li>\s+", "<li>");
-            html = html.Normalize(NormalizationForm.FormKD);
-            return html;
-        }
-
-        public static readonly bool IsContinuousIntegration = Environment.GetEnvironmentVariable("CI") != null;
-
-        public static readonly string TestsDirectory = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(typeof(TestParser).Assembly.Location), "../../.."));
-
-        static TestParser()
-        {
-            const string RunningInsideVisualStudioPath = "\\src\\.vs\\markdig\\";
-            int index = TestsDirectory.IndexOf(RunningInsideVisualStudioPath);
-            if (index != -1)
-            {
-                TestsDirectory = TestsDirectory.Substring(0, index) + "\\src\\Markdig.Tests";
-            }
+            TestsDirectory = TestsDirectory.Substring(0, index) + "\\src\\Markdig.Tests";
         }
     }
 }

src/Markdig.Tests/TestPipeTable.cs

@@ -1,26 +1,21 @@
 using Markdig.Extensions.Tables;
 using Markdig.Syntax;
-using NUnit.Framework;
-using System.Linq;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public sealed class TestPipeTable
 {
-    [TestFixture]
-    public sealed class TestPipeTable
+    [TestCase("| S | T |\r\n|---|---| \r\n| G | H |")]
+    [TestCase("| S | T |\r\n|---|---|\t\r\n| G | H |")]
+    [TestCase("| S | T |\r\n|---|---|\f\r\n| G | H |")]
+    [TestCase("| S | \r\n|---|\r\n| G |\r\n\r\n| D | D |\r\n| ---| ---| \r\n| V | V |", 2)]
+    public void TestTableBug(string markdown, int tableCount = 1)
     {
-        [TestCase("| S | T |\r\n|---|---| \r\n| G | H |")]
-        [TestCase("| S | T |\r\n|---|---|\t\r\n| G | H |")]
-        [TestCase("| S | T |\r\n|---|---|\v\r\n| G | H |")]
-        [TestCase("| S | T |\r\n|---|---|\f\r\n| G | H |")]
-        [TestCase("| S | T |\r\n|---|---|\f\v\t \r\n| G | H |")]
-        [TestCase("| S | \r\n|---|\r\n| G |\r\n\r\n| D | D |\r\n| ---| ---| \r\n| V | V |", 2)]
-        public void TestTableBug(string markdown, int tableCount = 1)
-        {
-            MarkdownDocument document = Markdown.Parse(markdown, new MarkdownPipelineBuilder().UseAdvancedExtensions().Build());
+        MarkdownDocument document = Markdown.Parse(markdown, new MarkdownPipelineBuilder().UseAdvancedExtensions().Build());
 
-            Table[] tables = document.Descendants().OfType<Table>().ToArray();
+        Table[] tables = document.Descendants().OfType<Table>().ToArray();
 
-            Assert.AreEqual(tableCount, tables.Length);
-        }
+        Assert.AreEqual(tableCount, tables.Length);
     }
 }

src/Markdig.Tests/TestPlainText.cs

@@ -1,45 +1,42 @@
-using NUnit.Framework;
+namespace Markdig.Tests;
 
-namespace Markdig.Tests
+[TestFixture]
+public class TestPlainText
 {
-    [TestFixture]
-    public class TestPlainText
+    [Test]
+    [TestCase(/* markdownText: */ "foo bar", /* expected: */ "foo bar\n")]
+    [TestCase(/* markdownText: */ "foo\nbar", /* expected: */ "foo\nbar\n")]
+    [TestCase(/* markdownText: */ "*foo\nbar*", /* expected: */ "foo\nbar\n")]
+    [TestCase(/* markdownText: */ "[foo\nbar](http://example.com)", /* expected: */ "foo\nbar\n")]
+    [TestCase(/* markdownText: */ "<http://foo.bar.baz>", /* expected: */ "http://foo.bar.baz\n")]
+    [TestCase(/* markdownText: */ "# foo bar", /* expected: */ "foo bar\n")]
+    [TestCase(/* markdownText: */ "# foo\nbar", /* expected: */ "foo\nbar\n")]
+    [TestCase(/* markdownText: */ "> foo", /* expected: */ "foo\n")]
+    [TestCase(/* markdownText: */ "> foo\nbar\n> baz", /* expected: */ "foo\nbar\nbaz\n")]
+    [TestCase(/* markdownText: */ "`foo`", /* expected: */ "foo\n")]
+    [TestCase(/* markdownText: */ "`foo\nbar`", /* expected: */ "foo bar\n")] // new line within codespan is treated as whitespace (Example317)
+    [TestCase(/* markdownText: */ "```\nfoo bar\n```", /* expected: */ "foo bar\n")]
+    [TestCase(/* markdownText: */ "- foo\n- bar\n- baz", /* expected: */ "foo\nbar\nbaz\n")]
+    [TestCase(/* markdownText: */ "- foo<baz", /* expected: */ "foo<baz\n")]
+    [TestCase(/* markdownText: */ "- foo&lt;baz", /* expected: */ "foo<baz\n")]
+    [TestCase(/* markdownText: */ "## foo `bar::baz >`", /* expected: */ "foo bar::baz >\n")]
+    public void TestPlainEnsureNewLine(string markdownText, string expected)
     {
-        [Test]
-        [TestCase(/* markdownText: */ "foo bar", /* expected: */ "foo bar\n")]
-        [TestCase(/* markdownText: */ "foo\nbar", /* expected: */ "foo\nbar\n")]
-        [TestCase(/* markdownText: */ "*foo\nbar*", /* expected: */ "foo\nbar\n")]
-        [TestCase(/* markdownText: */ "[foo\nbar](http://example.com)", /* expected: */ "foo\nbar\n")]
-        [TestCase(/* markdownText: */ "<http://foo.bar.baz>", /* expected: */ "http://foo.bar.baz\n")]
-        [TestCase(/* markdownText: */ "# foo bar", /* expected: */ "foo bar\n")]
-        [TestCase(/* markdownText: */ "# foo\nbar", /* expected: */ "foo\nbar\n")]
-        [TestCase(/* markdownText: */ "> foo", /* expected: */ "foo\n")]
-        [TestCase(/* markdownText: */ "> foo\nbar\n> baz", /* expected: */ "foo\nbar\nbaz\n")]
-        [TestCase(/* markdownText: */ "`foo`", /* expected: */ "foo\n")]
-        [TestCase(/* markdownText: */ "`foo\nbar`", /* expected: */ "foo bar\n")] // new line within codespan is treated as whitespace (Example317)
-        [TestCase(/* markdownText: */ "```\nfoo bar\n```", /* expected: */ "foo bar\n")]
-        [TestCase(/* markdownText: */ "- foo\n- bar\n- baz", /* expected: */ "foo\nbar\nbaz\n")]
-        [TestCase(/* markdownText: */ "- foo<baz", /* expected: */ "foo<baz\n")]
-        [TestCase(/* markdownText: */ "- foo&lt;baz", /* expected: */ "foo<baz\n")]
-        [TestCase(/* markdownText: */ "## foo `bar::baz >`", /* expected: */ "foo bar::baz >\n")]
-        public void TestPlainEnsureNewLine(string markdownText, string expected)
-        {
-            var actual = Markdown.ToPlainText(markdownText);
-            Assert.AreEqual(expected, actual);
-        }
+        var actual = Markdown.ToPlainText(markdownText);
+        Assert.AreEqual(expected, actual);
+    }
 
-        [Test]
-        [TestCase(/* markdownText: */ ":::\nfoo\n:::", /* expected: */ "foo\n", /*extensions*/ "customcontainers|advanced")]
-        [TestCase(/* markdownText: */ ":::bar\nfoo\n:::", /* expected: */ "foo\n", /*extensions*/ "customcontainers+attributes|advanced")]
-        [TestCase(/* markdownText: */ "| Header1 | Header2 | Header3 |\n|--|--|--|\nt**es**t|value2|value3", /* expected: */ "Header1 Header2 Header3 test value2 value3","pipetables")]
-        public void TestPlainWithExtensions(string markdownText, string expected, string extensions)
-        {
-            TestParser.TestSpec(markdownText, expected, extensions, plainText: true);
-        }
+    [Test]
+    [TestCase(/* markdownText: */ ":::\nfoo\n:::", /* expected: */ "foo\n", /*extensions*/ "customcontainers|advanced")]
+    [TestCase(/* markdownText: */ ":::bar\nfoo\n:::", /* expected: */ "foo\n", /*extensions*/ "customcontainers+attributes|advanced")]
+    [TestCase(/* markdownText: */ "| Header1 | Header2 | Header3 |\n|--|--|--|\nt**es**t|value2|value3", /* expected: */ "Header1 Header2 Header3 test value2 value3","pipetables")]
+    public void TestPlainWithExtensions(string markdownText, string expected, string extensions)
+    {
+        TestParser.TestSpec(markdownText, expected, extensions, plainText: true);
+    }
 
-        public static void TestSpec(string markdownText, string expected, string extensions, string context = null)
-        {
-            TestParser.TestSpec(markdownText, expected, extensions, plainText: true, context: context);
-        }
+    public static void TestSpec(string markdownText, string expected, string extensions, string context = null)
+    {
+        TestParser.TestSpec(markdownText, expected, extensions, plainText: true, context: context);
     }
 }

src/Markdig.Tests/TestPlayParser.cs

@@ -1,97 +1,94 @@
 // Copyright (c) Alexandre Mutel. All rights reserved.
 // This file is licensed under the BSD-Clause 2 license.
 // See the license.txt file in the project root for more information.
-using System;
-using System.Linq;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestPlayParser
 {
-    [TestFixture]
-    public class TestPlayParser
+    [Test]
+    public void TestBugWithEmphasisAndTable()
     {
-        [Test]
-        public void TestBugWithEmphasisAndTable()
-        {
-            TestParser.TestSpec("**basics | 8:00**", "<p><strong>basics | 8:00</strong></p>", "advanced");
-        }
+        TestParser.TestSpec("**basics | 8:00**", "<p><strong>basics | 8:00</strong></p>", "advanced");
+    }
 
-        [Test]
-        public void TestLinksWithCarriageReturn()
-        {
-            var text = "[Link 1][link-1], [link 2][link-2].\r\n\r\n[link-1]: https://example.com\r\n[link-2]: https://example.com";
-            var result = Markdown.ToHtml(text).TrimEnd();
-            Assert.AreEqual("<p><a href=\"https://example.com\">Link 1</a>, <a href=\"https://example.com\">link 2</a>.</p>", result);
-        }
+    [Test]
+    public void TestLinksWithCarriageReturn()
+    {
+        var text = "[Link 1][link-1], [link 2][link-2].\r\n\r\n[link-1]: https://example.com\r\n[link-2]: https://example.com";
+        var result = Markdown.ToHtml(text).TrimEnd();
+        Assert.AreEqual("<p><a href=\"https://example.com\">Link 1</a>, <a href=\"https://example.com\">link 2</a>.</p>", result);
+    }
 
-        [Test]
-        public void TestLinksWithTitleAndCarriageReturn()
-        {
-            var text = "[Link 1][link-1], [link 2][link-2].\r\n\r\n[link-1]: https://example.com \"title 1\" \r\n[link-2]: https://example.com \"title 2\"";
-            var result = Markdown.ToHtml(text).TrimEnd();
-            Assert.AreEqual("<p><a href=\"https://example.com\" title=\"title 1\">Link 1</a>, <a href=\"https://example.com\" title=\"title 2\">link 2</a>.</p>", result);
-        }
+    [Test]
+    public void TestLinksWithTitleAndCarriageReturn()
+    {
+        var text = "[Link 1][link-1], [link 2][link-2].\r\n\r\n[link-1]: https://example.com \"title 1\" \r\n[link-2]: https://example.com \"title 2\"";
+        var result = Markdown.ToHtml(text).TrimEnd();
+        Assert.AreEqual("<p><a href=\"https://example.com\" title=\"title 1\">Link 1</a>, <a href=\"https://example.com\" title=\"title 2\">link 2</a>.</p>", result);
+    }
 
-        [Test]
-        public void TestLink()
-        {
-            var doc = Markdown.Parse("There is a ![link](/yoyo)");
-            var link = doc.Descendants<ParagraphBlock>().SelectMany(x => x.Inline.Descendants<LinkInline>()).FirstOrDefault(l => l.IsImage);
-            Assert.AreEqual("/yoyo", link?.Url);
-        }
+    [Test]
+    public void TestLink()
+    {
+        var doc = Markdown.Parse("There is a ![link](/yoyo)");
+        var link = doc.Descendants<ParagraphBlock>().SelectMany(x => x.Inline.Descendants<LinkInline>()).FirstOrDefault(l => l.IsImage);
+        Assert.AreEqual("/yoyo", link?.Url);
+    }
 
-        [Test]
-        public void TestListBug2()
-        {
-            TestParser.TestSpec("10.\t*test* – test\n\n11.\t__test__ test\n\n", @"<ol start=""10"">
+    [Test]
+    public void TestListBug2()
+    {
+        TestParser.TestSpec("10.\t*test* – test\n\n11.\t__test__ test\n\n", @"<ol start=""10"">
 <li><p><em>test</em> – test</p>
 </li>
 <li><p><strong>test</strong> test</p>
 </li>
 </ol>
 ");
-        }
+    }
 
-        [Test]
-        public void TestSimple()
-        {
-            var text = @" *[HTML]: Hypertext Markup Language
+    [Test]
+    public void TestSimple()
+    {
+        var text = @" *[HTML]: Hypertext Markup Language
 
 Later in a text we are using HTML and it becomes an abbr tag HTML
 ";
-            //            var reader = new StringReader(@"> > toto tata
-            //> titi toto
-            //");
+        //            var reader = new StringReader(@"> > toto tata
+        //> titi toto
+        //");
 
-            //var result = Markdown.ToHtml(text, new MarkdownPipeline().UseFootnotes().UseEmphasisExtras());
-            var result = Markdown.ToHtml(text, new MarkdownPipelineBuilder().UseAbbreviations().Build());
-            //File.WriteAllText("test.html", result, Encoding.UTF8);
-            //Console.WriteLine(result);
-        }
+        //var result = Markdown.ToHtml(text, new MarkdownPipeline().UseFootnotes().UseEmphasisExtras());
+        var result = Markdown.ToHtml(text, new MarkdownPipelineBuilder().UseAbbreviations().Build());
+        //File.WriteAllText("test.html", result, Encoding.UTF8);
+        //Console.WriteLine(result);
+    }
 
-        [Test]
-        public void TestEmptyLiteral()
-        {
-            var text = @"> *some text*
+    [Test]
+    public void TestEmptyLiteral()
+    {
+        var text = @"> *some text*
 > some other text";
-            var doc = Markdown.Parse(text);
+        var doc = Markdown.Parse(text);
 
-            Assert.True(doc.Descendants<LiteralInline>().All(x => !x.Content.IsEmpty),
-                "There should not have any empty literals");
-        }
+        Assert.True(doc.Descendants<LiteralInline>().All(x => !x.Content.IsEmpty),
+            "There should not have any empty literals");
+    }
 
-        [Test]
-        public void TestSelfPipeline1()
-        {
-            var text = @" <!--markdig:pipetables-->
+    [Test]
+    public void TestSelfPipeline1()
+    {
+        var text = @" <!--markdig:pipetables-->
 
 a | b
 - | -
 0 | 1
 ";
-            TestParser.TestSpec(text, @"<!--markdig:pipetables-->
+        TestParser.TestSpec(text, @"<!--markdig:pipetables-->
 <table>
 <thead>
 <tr>
@@ -107,17 +104,17 @@ a | b
 </tbody>
 </table>
 ", "self");
-        }
+    }
 
-        [Test]
-        public void TestListBug()
-        {
-            // TODO: Add this test back to the CommonMark specs
-            var text = @"- item1
+    [Test]
+    public void TestListBug()
+    {
+        // TODO: Add this test back to the CommonMark specs
+        var text = @"- item1
   - item2
     - item3
       - item4";
-            TestParser.TestSpec(text, @"<ul>
+        TestParser.TestSpec(text, @"<ul>
 <li>item1
 <ul>
 <li>item2
@@ -130,13 +127,13 @@ a | b
 </ul></li>
 </ul>
 ");
-        }
+    }
 
 
-        [Test]
-        public void TestHtmlBug()
-        {
-            TestParser.TestSpec(@" # header1
+    [Test]
+    public void TestHtmlBug()
+    {
+        TestParser.TestSpec(@" # header1
 
 <pre class='copy'>
 blabla
@@ -148,43 +145,43 @@ blabla
 blabla
 </pre>
 <h1>header2</h1>");
-        }
+    }
 
-        [Test]
-        public void TestHtmlh4Bug()
-        {
-            TestParser.TestSpec(@"<h4>foobar</h4>", @"<h4>foobar</h4>");
-        }
+    [Test]
+    public void TestHtmlh4Bug()
+    {
+        TestParser.TestSpec(@"<h4>foobar</h4>", @"<h4>foobar</h4>");
+    }
 
-        [Test]
-        public void TestStandardUriEscape()
-        {
-            TestParser.TestSpec(@"![你好](你好.png)", "<p><img src=\"你好.png\" alt=\"你好\" /></p>", "nonascii-noescape");
-        }
+    [Test]
+    public void TestStandardUriEscape()
+    {
+        TestParser.TestSpec(@"![你好](你好.png)", "<p><img src=\"你好.png\" alt=\"你好\" /></p>", "nonascii-noescape");
+    }
 
 
-        [Test]
-        public void TestBugAdvanced()
-        {
-            TestParser.TestSpec(@"`https://{domain}/callbacks`
+    [Test]
+    public void TestBugAdvanced()
+    {
+        TestParser.TestSpec(@"`https://{domain}/callbacks`
 #### HEADING
 Paragraph
 ", "<p><code>https://{domain}/callbacks</code></p>\n<h4 id=\"heading\">HEADING</h4>\n<p>Paragraph</p>", "advanced");
-        }
+    }
 
 
-        [Test]
-        public void TestBugEmphAttribute()
-        {
-            // https://github.com/lunet-io/markdig/issues/108
-            TestParser.TestSpec(@"*test*{name=value}", "<p><em name=\"value\">test</em></p>", "advanced");
-        }
+    [Test]
+    public void TestBugEmphAttribute()
+    {
+        // https://github.com/lunet-io/markdig/issues/108
+        TestParser.TestSpec(@"*test*{name=value}", "<p><em name=\"value\">test</em></p>", "advanced");
+    }
 
-        [Test]
-        public void TestBugPipeTables()
-        {
-            // https://github.com/lunet-io/markdig/issues/73
-            TestParser.TestSpec(@"| abc | def |
+    [Test]
+    public void TestBugPipeTables()
+    {
+        // https://github.com/lunet-io/markdig/issues/73
+        TestParser.TestSpec(@"| abc | def |
 | --- | --- |
 | 1 | ~3 |
 ", @"<table>
@@ -201,12 +198,12 @@ Paragraph
 </tr>
 </tbody>
 </table>", "advanced");
-        }
+    }
 
-        [Test]
-        public void TestGridTableWithCustomAttributes() {
+    [Test]
+    public void TestGridTableWithCustomAttributes() {
 
-            var input = @"
+        var input = @"
 {.table}
 +---+---+
 | a | b |
@@ -215,7 +212,7 @@ Paragraph
 +---+---+
 ";
 
-            var expected = @"<table class=""table"">
+        var expected = @"<table class=""table"">
 <col style=""width:50%"" />
 <col style=""width:50%"" />
 <thead>
@@ -232,76 +229,75 @@ Paragraph
 </tbody>
 </table>
 ";
-            TestParser.TestSpec(input, expected, "advanced");
-        }
-
-        [Test]
-        public void TestSamePipelineAllExtensions()
-        {
-            var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
-
-            // Reuse the same pipeline
-            var result1 = Markdown.ToHtml("This is a \"\"citation\"\"", pipeline);
-            var result2 = Markdown.ToHtml("This is a \"\"citation\"\"", pipeline);
-
-            Assert.AreEqual("<p>This is a <cite>citation</cite></p>", result1.Trim());
-            Assert.AreEqual(result1, result2);
-        }
-
-        // Test for emoji and smileys
-        //        var text = @" This is a test with a :) and a :angry: smiley";
-
-
-        // Test for definition lists:
-        //
-        //        var text = @"
-        //Term 1
-        //:   This is a definition item
-        //    With a paragraph
-        //    > This is a block quote
-
-        //    - This is a list
-        //    - item2
-
-        //    ```java
-        //    Test
-
-
-        //    ```
-
-        //    And a lazy line
-        //:   This ia another definition item
-
-        //Term2
-        //Term3 *with some inline*
-        //:   This is another definition for term2
-        //";
-
-
-        // Test for grid table
-
-
-        //        var text = @"
-        //+-----------------------------------+--------------------------------------+
-        //| - this is a list                  | > We have a blockquote
-        //| - this is a second item           |
-        //|                                   |
-        //| ```                               |
-        //| Yes                               |
-        //| ```                               |
-        //+===================================+======================================+
-        //| This is a second line             |
-        //+-----------------------------------+--------------------------------------+
-
-        //:::spoiler  {#yessss}
-        //This is a spoiler
-        //:::
-
-        ///| we have mult | paragraph    |
-        ///| we have a new colspan with a long line
-        ///| and lots of text
-        //";
-
-
+        TestParser.TestSpec(input, expected, "advanced");
     }
+
+    [Test]
+    public void TestSamePipelineAllExtensions()
+    {
+        var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
+
+        // Reuse the same pipeline
+        var result1 = Markdown.ToHtml("This is a \"\"citation\"\"", pipeline);
+        var result2 = Markdown.ToHtml("This is a \"\"citation\"\"", pipeline);
+
+        Assert.AreEqual("<p>This is a <cite>citation</cite></p>", result1.Trim());
+        Assert.AreEqual(result1, result2);
+    }
+
+    // Test for emoji and smileys
+    //        var text = @" This is a test with a :) and a :angry: smiley";
+
+
+    // Test for definition lists:
+    //
+    //        var text = @"
+    //Term 1
+    //:   This is a definition item
+    //    With a paragraph
+    //    > This is a block quote
+
+    //    - This is a list
+    //    - item2
+
+    //    ```java
+    //    Test
+
+
+    //    ```
+
+    //    And a lazy line
+    //:   This ia another definition item
+
+    //Term2
+    //Term3 *with some inline*
+    //:   This is another definition for term2
+    //";
+
+
+    // Test for grid table
+
+
+    //        var text = @"
+    //+-----------------------------------+--------------------------------------+
+    //| - this is a list                  | > We have a blockquote
+    //| - this is a second item           |
+    //|                                   |
+    //| ```                               |
+    //| Yes                               |
+    //| ```                               |
+    //+===================================+======================================+
+    //| This is a second line             |
+    //+-----------------------------------+--------------------------------------+
+
+    //:::spoiler  {#yessss}
+    //This is a spoiler
+    //:::
+
+    ///| we have mult | paragraph    |
+    ///| we have a new colspan with a long line
+    ///| and lots of text
+    //";
+
+
 }

src/Markdig.Tests/TestPragmaLines.cs

@@ -1,19 +1,18 @@
-// Copyright (c) Alexandre Mutel. All rights reserved.
+// Copyright (c) Alexandre Mutel. All rights reserved.
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
 using Markdig.Syntax;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestPragmaLines
 {
-    [TestFixture]
-    public class TestPragmaLines
+    [Test]
+    public void TestFindClosest()
     {
-        [Test]
-        public void TestFindClosest()
-        {
-            var doc = Markdown.Parse(
+        var doc = Markdown.Parse(
 "test1\n" +                      // 0
 "\n" +                           // 1
 "test2\n" +                      // 2
@@ -37,27 +36,27 @@ namespace Markdig.Tests
 "- item3\n" +                    // 20
 "\n" +                           // 21
 "This is a last paragraph\n"     // 22
-                , new MarkdownPipelineBuilder().UsePragmaLines().Build());
+            , new MarkdownPipelineBuilder().UsePragmaLines().Build());
 
-            foreach (var exact in new int[] {0, 2, 4, 6, 8, 10, 18, 19, 20, 22})
-            {
-                Assert.AreEqual(exact, doc.FindClosestLine(exact));
-            }
-
-            Assert.AreEqual(22, doc.FindClosestLine(23));
-
-            Assert.AreEqual(10, doc.FindClosestLine(11));
-            Assert.AreEqual(10, doc.FindClosestLine(12));
-            Assert.AreEqual(10, doc.FindClosestLine(13));
-            Assert.AreEqual(18, doc.FindClosestLine(14)); // > 50% of the paragraph, we switch to next
-            Assert.AreEqual(18, doc.FindClosestLine(15));
-            Assert.AreEqual(18, doc.FindClosestLine(16));
+        foreach (var exact in new int[] {0, 2, 4, 6, 8, 10, 18, 19, 20, 22})
+        {
+            Assert.AreEqual(exact, doc.FindClosestLine(exact));
         }
 
-        [Test]
-        public void TestFindClosest1()
-        {
-            var text = 
+        Assert.AreEqual(22, doc.FindClosestLine(23));
+
+        Assert.AreEqual(10, doc.FindClosestLine(11));
+        Assert.AreEqual(10, doc.FindClosestLine(12));
+        Assert.AreEqual(10, doc.FindClosestLine(13));
+        Assert.AreEqual(18, doc.FindClosestLine(14)); // > 50% of the paragraph, we switch to next
+        Assert.AreEqual(18, doc.FindClosestLine(15));
+        Assert.AreEqual(18, doc.FindClosestLine(16));
+    }
+
+    [Test]
+    public void TestFindClosest1()
+    {
+        var text = 
 "- item1\n" +                    // 0
 "  - item11\n" +                 // 1
 "  - item12\n" +                 // 2
@@ -66,15 +65,14 @@ namespace Markdig.Tests
 "    - item131\n" +              // 5
 "      - item1311\n";            // 6
 
-            var pipeline = new MarkdownPipelineBuilder().UsePragmaLines().Build();
-            var doc = Markdown.Parse(text, pipeline);
+        var pipeline = new MarkdownPipelineBuilder().UsePragmaLines().Build();
+        var doc = Markdown.Parse(text, pipeline);
 
-            for (int exact = 0; exact < 7; exact++)
-            {
-                Assert.AreEqual(exact, doc.FindClosestLine(exact));
-            }
-
-            Assert.AreEqual(6, doc.FindClosestLine(50));
+        for (int exact = 0; exact < 7; exact++)
+        {
+            Assert.AreEqual(exact, doc.FindClosestLine(exact));
         }
+
+        Assert.AreEqual(6, doc.FindClosestLine(50));
     }
 }

src/Markdig.Tests/TestReferralLinks.cs

@@ -1,57 +1,54 @@
-using NUnit.Framework;
+namespace Markdig.Tests;
 
-namespace Markdig.Tests
+[TestFixture]
+public class TestReferralLinks
 {
-    [TestFixture]
-    public class TestReferralLinks
+    [Test]
+    public void TestLinksWithNoFollowRel()
     {
-        [Test]
-        public void TestLinksWithNoFollowRel()
-        {
-            var markdown = "[world](http://example.com)";
-            var expected = "nofollow";
+        var markdown = "[world](http://example.com)";
+        var expected = "nofollow";
 
 #pragma warning disable 0618
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseNoFollowLinks()
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseNoFollowLinks()
 #pragma warning restore 0618
-                .Build();
-            var html = Markdown.ToHtml(markdown, pipeline);
+            .Build();
+        var html = Markdown.ToHtml(markdown, pipeline);
 
-            Assert.That(html, Contains.Substring($"rel=\"{expected}\""));
-        }
+        Assert.That(html, Contains.Substring($"rel=\"{expected}\""));
+    }
 
-        [Test]
-        [TestCase(new[] { "nofollow" }, "nofollow")]
-        [TestCase(new[] { "noopener" }, "noopener")]
-        [TestCase(new[] { "nofollow", "noopener"}, "nofollow noopener")]
-        public void TestLinksWithCustomRel(string[] rels, string expected)
-        {
-            var markdown = "[world](http://example.com)";
+    [Test]
+    [TestCase(new[] { "nofollow" }, "nofollow")]
+    [TestCase(new[] { "noopener" }, "noopener")]
+    [TestCase(new[] { "nofollow", "noopener"}, "nofollow noopener")]
+    public void TestLinksWithCustomRel(string[] rels, string expected)
+    {
+        var markdown = "[world](http://example.com)";
 
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseReferralLinks(rels)
-                .Build();
-            var html = Markdown.ToHtml(markdown, pipeline);
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseReferralLinks(rels)
+            .Build();
+        var html = Markdown.ToHtml(markdown, pipeline);
 
-            Assert.That(html, Contains.Substring($"rel=\"{expected}\""));
-        }
+        Assert.That(html, Contains.Substring($"rel=\"{expected}\""));
+    }
 
-        [Test]
-        [TestCase(new[] { "noopener" }, "noopener")]
-        [TestCase(new[] { "nofollow" }, "nofollow")]
-        [TestCase(new[] { "nofollow", "noopener" }, "nofollow noopener")]
-        public void TestAutoLinksWithCustomRel(string[] rels, string expected)
-        {
-            var markdown = "http://example.com";
+    [Test]
+    [TestCase(new[] { "noopener" }, "noopener")]
+    [TestCase(new[] { "nofollow" }, "nofollow")]
+    [TestCase(new[] { "nofollow", "noopener" }, "nofollow noopener")]
+    public void TestAutoLinksWithCustomRel(string[] rels, string expected)
+    {
+        var markdown = "http://example.com";
 
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseAutoLinks()
-                .UseReferralLinks(rels)
-                .Build();
-            var html = Markdown.ToHtml(markdown, pipeline);
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseAutoLinks()
+            .UseReferralLinks(rels)
+            .Build();
+        var html = Markdown.ToHtml(markdown, pipeline);
 
-            Assert.That(html, Contains.Substring($"rel=\"{expected}\""));
-        }
+        Assert.That(html, Contains.Substring($"rel=\"{expected}\""));
     }
 }

src/Markdig.Tests/TestRelativeUrlReplacement.cs

@@ -1,48 +1,44 @@
-using System;
-using System.IO;
 using Markdig.Parsers;
 using Markdig.Renderers;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestRelativeUrlReplacement
 {
-    public class TestRelativeUrlReplacement
+    [Test]
+    public void ReplacesRelativeLinks()
     {
-        [Test]
-        public void ReplacesRelativeLinks()
-        {
-            TestSpec("https://example.com", "Link: [hello](/relative.jpg)", "https://example.com/relative.jpg");
-            TestSpec("https://example.com", "Link: [hello](relative.jpg)", "https://example.com/relative.jpg");
-            TestSpec("https://example.com/", "Link: [hello](/relative.jpg?a=b)", "https://example.com/relative.jpg?a=b");
-            TestSpec("https://example.com/", "Link: [hello](relative.jpg#x)", "https://example.com/relative.jpg#x");
-            TestSpec(null, "Link: [hello](relative.jpg)", "relative.jpg");
-            TestSpec(null, "Link: [hello](/relative.jpg)", "/relative.jpg");
-            TestSpec("https://example.com", "Link: [hello](/relative.jpg)", "https://example.com/relative.jpg");
-        }
+        TestSpec("https://example.com", "Link: [hello](/relative.jpg)", "https://example.com/relative.jpg");
+        TestSpec("https://example.com", "Link: [hello](relative.jpg)", "https://example.com/relative.jpg");
+        TestSpec("https://example.com/", "Link: [hello](/relative.jpg?a=b)", "https://example.com/relative.jpg?a=b");
+        TestSpec("https://example.com/", "Link: [hello](relative.jpg#x)", "https://example.com/relative.jpg#x");
+        TestSpec(null, "Link: [hello](relative.jpg)", "relative.jpg");
+        TestSpec(null, "Link: [hello](/relative.jpg)", "/relative.jpg");
+        TestSpec("https://example.com", "Link: [hello](/relative.jpg)", "https://example.com/relative.jpg");
+    }
 
-        [Test]
-        public void ReplacesRelativeImageSources()
-        {
-            TestSpec("https://example.com", "Image: ![alt text](/image.jpg)", "https://example.com/image.jpg");
-            TestSpec("https://example.com", "Image: ![alt text](image.jpg \"title\")", "https://example.com/image.jpg");
-            TestSpec(null, "Image: ![alt text](/image.jpg)", "/image.jpg");
-        }
+    [Test]
+    public void ReplacesRelativeImageSources()
+    {
+        TestSpec("https://example.com", "Image: ![alt text](/image.jpg)", "https://example.com/image.jpg");
+        TestSpec("https://example.com", "Image: ![alt text](image.jpg \"title\")", "https://example.com/image.jpg");
+        TestSpec(null, "Image: ![alt text](/image.jpg)", "/image.jpg");
+    }
 
-        public static void TestSpec(string baseUrl, string markdown, string expectedLink)
-        {
-            var pipeline = new MarkdownPipelineBuilder().Build();
+    public static void TestSpec(string baseUrl, string markdown, string expectedLink)
+    {
+        var pipeline = new MarkdownPipelineBuilder().Build();
 
-            var writer = new StringWriter();
-            var renderer = new HtmlRenderer(writer);
-            if (baseUrl != null)
-                renderer.BaseUrl = new Uri(baseUrl);
-            pipeline.Setup(renderer);
+        var writer = new StringWriter();
+        var renderer = new HtmlRenderer(writer);
+        if (baseUrl != null)
+            renderer.BaseUrl = new Uri(baseUrl);
+        pipeline.Setup(renderer);
 
-            var document = MarkdownParser.Parse(markdown, pipeline);
-            renderer.Render(document);
-            writer.Flush();
+        var document = MarkdownParser.Parse(markdown, pipeline);
+        renderer.Render(document);
+        writer.Flush();
 
-            Assert.That(writer.ToString(), Contains.Substring("=\"" + expectedLink + "\""));
-        }
+        Assert.That(writer.ToString(), Contains.Substring("=\"" + expectedLink + "\""));
     }
 }

src/Markdig.Tests/TestRoundtrip.cs

@@ -1,32 +1,29 @@
 using Markdig.Renderers.Roundtrip;
 using Markdig.Syntax;
-using NUnit.Framework;
-using System.IO;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+internal static class TestRoundtrip
 {
-    internal static class TestRoundtrip
+    internal static void TestSpec(string markdownText, string expected, string extensions, string context = null)
     {
-        internal static void TestSpec(string markdownText, string expected, string extensions, string context = null)
-        {
-            RoundTrip(markdownText, context);
-        }
+        RoundTrip(markdownText, context);
+    }
 
-        internal static void RoundTrip(string markdown, string context = null)
-        {
-            var pipelineBuilder = new MarkdownPipelineBuilder();
-            pipelineBuilder.EnableTrackTrivia();
-            pipelineBuilder.UseYamlFrontMatter();
-            MarkdownPipeline pipeline = pipelineBuilder.Build();
-            MarkdownDocument markdownDocument = Markdown.Parse(markdown, pipeline);
-            var sw = new StringWriter();
-            var nr = new RoundtripRenderer(sw);
-            pipeline.Setup(nr);
+    internal static void RoundTrip(string markdown, string context = null)
+    {
+        var pipelineBuilder = new MarkdownPipelineBuilder();
+        pipelineBuilder.EnableTrackTrivia();
+        pipelineBuilder.UseYamlFrontMatter();
+        MarkdownPipeline pipeline = pipelineBuilder.Build();
+        MarkdownDocument markdownDocument = Markdown.Parse(markdown, pipeline);
+        var sw = new StringWriter();
+        var nr = new RoundtripRenderer(sw);
+        pipeline.Setup(nr);
 
-            nr.Write(markdownDocument);
+        nr.Write(markdownDocument);
 
-            var result = sw.ToString();
-            TestParser.PrintAssertExpected("", result, markdown, context);
-        }
+        var result = sw.ToString();
+        TestParser.PrintAssertExpected("", result, markdown, context);
     }
 }

src/Markdig.Tests/TestSmartyPants.cs

@@ -1,36 +1,34 @@
 using Markdig.Extensions.SmartyPants;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestSmartyPants
 {
-    public class TestSmartyPants
+    [Test]
+    public void MappingCanBeReconfigured()
     {
-        [Test]
-        public void MappingCanBeReconfigured()
-        {
-            SmartyPantOptions options = new SmartyPantOptions();
-            options.Mapping[SmartyPantType.LeftAngleQuote] = "foo";
-            options.Mapping[SmartyPantType.RightAngleQuote] = "bar";
+        var options = new SmartyPantOptions();
+        options.Mapping[SmartyPantType.LeftAngleQuote] = "foo";
+        options.Mapping[SmartyPantType.RightAngleQuote] = "bar";
 
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseSmartyPants(options)
-                .Build();
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseSmartyPants(options)
+            .Build();
 
-            TestParser.TestSpec("<<test>>", "<p>footestbar</p>", pipeline);
-        }
+        TestParser.TestSpec("<<test>>", "<p>footestbar</p>", pipeline);
+    }
 
-        [Test]
-        public void MappingCanBeReconfigured_HandlesRemovedMappings()
-        {
-            SmartyPantOptions options = new SmartyPantOptions();
-            options.Mapping.Remove(SmartyPantType.LeftAngleQuote);
-            options.Mapping.Remove(SmartyPantType.RightAngleQuote);
+    [Test]
+    public void MappingCanBeReconfigured_HandlesRemovedMappings()
+    {
+        var options = new SmartyPantOptions();
+        options.Mapping.Remove(SmartyPantType.LeftAngleQuote);
+        options.Mapping.Remove(SmartyPantType.RightAngleQuote);
 
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseSmartyPants(options)
-                .Build();
+        var pipeline = new MarkdownPipelineBuilder()
+            .UseSmartyPants(options)
+            .Build();
 
-            TestParser.TestSpec("<<test>>", "<p>&laquo;test&raquo;</p>", pipeline);
-        }
+        TestParser.TestSpec("<<test>>", "<p>&laquo;test&raquo;</p>", pipeline);
     }
 }

src/Markdig.Tests/TestStringSliceList.cs

@@ -1,185 +1,242 @@
-using NUnit.Framework;
+using System.Collections;
 using System.Text;
+
 using Markdig.Helpers;
-using System;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+[TestFixture]
+public class TestStringSliceList
 {
-    [TestFixture]
-    public class TestStringSliceList
+    // TODO: Add tests for StringSlice
+    // TODO: Add more tests for StringLineGroup
+
+    [Test]
+    public void TestStringLineGroupSimple()
     {
-        // TODO: Add tests for StringSlice
-        // TODO: Add more tests for StringLineGroup
-
-        [Test]
-        public void TestStringLineGroupSimple()
+        var text = new StringLineGroup(4)
         {
-            var text = new StringLineGroup(4)
-            {
-                new StringSlice("ABC", NewLine.LineFeed),
-                new StringSlice("E", NewLine.LineFeed),
-                new StringSlice("F")
-            };
+            new StringSlice("ABC", NewLine.LineFeed),
+            new StringSlice("E", NewLine.LineFeed),
+            new StringSlice("F")
+        };
 
-            var iterator = text.ToCharIterator();
-            Assert.AreEqual("ABC\nE\nF".Length, iterator.End - iterator.Start + 1);
+        var iterator = text.ToCharIterator();
+        Assert.AreEqual("ABC\nE\nF".Length, iterator.End - iterator.Start + 1);
 
-            var chars = ToString(text.ToCharIterator());
-            TextAssert.AreEqual("ABC\nE\nF", chars.ToString());
+        var chars = ToString(text.ToCharIterator());
+        TextAssert.AreEqual("ABC\nE\nF", chars.ToString());
 
-            TextAssert.AreEqual("ABC\nE\nF", text.ToString());
-        }
+        TextAssert.AreEqual("ABC\nE\nF", text.ToString());
+    }
 
-        [Test]
-        public void TestStringLineGroupWithSlices()
+    [Test]
+    public void TestStringLineGroupWithSlices()
+    {
+        var text = new StringLineGroup(4)
         {
-            var text = new StringLineGroup(4)
-            {
-                new StringSlice("XABC", NewLine.LineFeed) { Start = 1},
-                new StringSlice("YYE", NewLine.LineFeed) { Start = 2},
-                new StringSlice("ZZZF") { Start = 3 }
-            };
+            new StringSlice("XABC", NewLine.LineFeed) { Start = 1},
+            new StringSlice("YYE", NewLine.LineFeed) { Start = 2},
+            new StringSlice("ZZZF") { Start = 3 }
+        };
 
-            var chars = ToString(text.ToCharIterator());
-            TextAssert.AreEqual("ABC\nE\nF", chars.ToString());
-        }
+        var chars = ToString(text.ToCharIterator());
+        TextAssert.AreEqual("ABC\nE\nF", chars.ToString());
+    }
 
 
-        private static string ToString(StringLineGroup.Iterator text)
+    private static string ToString(StringLineGroup.Iterator text)
+    {
+        var chars = new StringBuilder();
+        while (text.CurrentChar != '\0')
         {
-            var chars = new StringBuilder();
-            while (text.CurrentChar != '\0')
-            {
-                chars.Append(text.CurrentChar);
-                text.NextChar();
-            }
-            return chars.ToString();
-        }
-
-        [Test]
-        public void TestStringLineGroupSaveAndRestore()
-        {
-            var text = new StringLineGroup(4)
-            {
-                new StringSlice("ABCD", NewLine.LineFeed),
-                new StringSlice("EF"),
-            }.ToCharIterator();
-
-            Assert.AreEqual('A', text.CurrentChar);
-            Assert.AreEqual(0, text.SliceIndex);
-
-            text.NextChar(); // B
-
-            text.NextChar(); // C
-            text.NextChar(); // D
-            text.NextChar(); // \n
+            chars.Append(text.CurrentChar);
             text.NextChar();
-            Assert.AreEqual('E', text.CurrentChar);
-            Assert.AreEqual(1, text.SliceIndex);
         }
+        return chars.ToString();
+    }
 
-        [Test]
-        public void TestSkipWhitespaces()
+    [Test]
+    public void TestStringLineGroupSaveAndRestore()
+    {
+        var text = new StringLineGroup(4)
         {
-            var text = new StringLineGroup("             ABC").ToCharIterator();
-            Assert.False(text.TrimStart());
-            Assert.AreEqual('A', text.CurrentChar);
+            new StringSlice("ABCD", NewLine.LineFeed),
+            new StringSlice("EF"),
+        }.ToCharIterator();
 
-            text = new StringLineGroup("        ").ToCharIterator();
-            Assert.True(text.TrimStart());
-            Assert.AreEqual('\0', text.CurrentChar);
+        Assert.AreEqual('A', text.CurrentChar);
+        Assert.AreEqual(0, text.SliceIndex);
 
-            var slice = new StringSlice("             ABC");
-            Assert.False(slice.TrimStart());
+        text.NextChar(); // B
 
-            slice = new StringSlice("        ");
-            Assert.True(slice.TrimStart());
-        }
+        text.NextChar(); // C
+        text.NextChar(); // D
+        text.NextChar(); // \n
+        text.NextChar();
+        Assert.AreEqual('E', text.CurrentChar);
+        Assert.AreEqual(1, text.SliceIndex);
+    }
 
-        [Test]
-        public void TestStringLineGroupWithModifiedStart()
+    [Test]
+    public void TestSkipWhitespaces()
+    {
+        var text = new StringLineGroup("             ABC").ToCharIterator();
+        Assert.False(text.TrimStart());
+        Assert.AreEqual('A', text.CurrentChar);
+
+        text = new StringLineGroup("        ").ToCharIterator();
+        Assert.True(text.TrimStart());
+        Assert.AreEqual('\0', text.CurrentChar);
+
+        var slice = new StringSlice("             ABC");
+        Assert.False(slice.TrimStart());
+
+        slice = new StringSlice("        ");
+        Assert.True(slice.TrimStart());
+    }
+
+    [Test]
+    public void TestStringLineGroupWithModifiedStart()
+    {
+        var line1 = new StringSlice("  ABC", NewLine.LineFeed);
+        line1.NextChar();
+        line1.NextChar();
+
+        var line2 = new StringSlice("  DEF ");
+        line2.Trim();
+
+        var text = new StringLineGroup(4) {line1, line2};
+
+        var result = ToString(text.ToCharIterator());
+        TextAssert.AreEqual("ABC\nDEF", result);
+    }
+
+    [Test]
+    public void TestStringLineGroupWithTrim()
+    {
+        var line1 = new StringSlice("  ABC  ", NewLine.LineFeed);
+        line1.NextChar();
+        line1.NextChar();
+
+        var line2 = new StringSlice("  DEF ");
+
+        var text = new StringLineGroup(4) { line1, line2}.ToCharIterator();
+        text.TrimStart();
+
+        var result = ToString(text);
+        TextAssert.AreEqual("ABC  \n  DEF ", result);
+    }
+
+    [Test]
+    public void TestStringLineGroupIteratorPeekChar()
+    {
+        var iterator = new StringLineGroup(4)
         {
-            var line1 = new StringSlice("  ABC", NewLine.LineFeed);
-            line1.NextChar();
-            line1.NextChar();
+            new StringSlice("ABC", NewLine.LineFeed),
+            new StringSlice("E", NewLine.LineFeed),
+            new StringSlice("F")
+        }.ToCharIterator();
 
-            var line2 = new StringSlice("  DEF ");
-            line2.Trim();
+        Assert.AreEqual('A', iterator.CurrentChar);
+        Assert.AreEqual('A', iterator.PeekChar(0));
+        Assert.AreEqual('B', iterator.PeekChar());
+        Assert.AreEqual('B', iterator.PeekChar(1));
+        Assert.AreEqual('C', iterator.PeekChar(2));
+        Assert.AreEqual('\n', iterator.PeekChar(3));
+        Assert.AreEqual('E', iterator.PeekChar(4));
+        Assert.AreEqual('\n', iterator.PeekChar(5));
+        Assert.AreEqual('F', iterator.PeekChar(6));
+        Assert.AreEqual('\0', iterator.PeekChar(7)); // There is no \n appended to the last line
+        Assert.AreEqual('\0', iterator.PeekChar(8));
+        Assert.AreEqual('\0', iterator.PeekChar(100));
 
-            var text = new StringLineGroup(4) {line1, line2};
+        Assert.Throws<ArgumentOutOfRangeException>(() => iterator.PeekChar(-1));
+    }
 
-            var result = ToString(text.ToCharIterator());
-            TextAssert.AreEqual("ABC\nDEF", result);
-        }
-
-        [Test]
-        public void TestStringLineGroupWithTrim()
+    [Test]
+    public void TestIteratorSkipChar()
+    {
+        var lineGroup = new StringLineGroup(4)
         {
-            var line1 = new StringSlice("  ABC  ", NewLine.LineFeed);
-            line1.NextChar();
-            line1.NextChar();
+            new StringSlice("ABC", NewLine.LineFeed),
+            new StringSlice("E", NewLine.LineFeed)
+        };
 
-            var line2 = new StringSlice("  DEF ");
+        Test(lineGroup.ToCharIterator());
 
-            var text = new StringLineGroup(4) { line1, line2}.ToCharIterator();
-            text.TrimStart();
+        Test(new StringSlice("ABC\nE\n"));
 
-            var result = ToString(text);
-            TextAssert.AreEqual("ABC  \n  DEF ", result);
-        }
+        Test(new StringSlice("Foo\nABC\nE\n", 4, 9));
 
-        [Test]
-        public void TestStringLineGroupIteratorPeekChar()
+        static void Test<T>(T iterator) where T : ICharIterator
         {
-            var iterator = new StringLineGroup(4)
-            {
-                new StringSlice("ABC", NewLine.LineFeed),
-                new StringSlice("E", NewLine.LineFeed),
-                new StringSlice("F")
-            }.ToCharIterator();
-
-            Assert.AreEqual('A', iterator.CurrentChar);
-            Assert.AreEqual('A', iterator.PeekChar(0));
-            Assert.AreEqual('B', iterator.PeekChar());
-            Assert.AreEqual('B', iterator.PeekChar(1));
-            Assert.AreEqual('C', iterator.PeekChar(2));
-            Assert.AreEqual('\n', iterator.PeekChar(3));
-            Assert.AreEqual('E', iterator.PeekChar(4));
-            Assert.AreEqual('\n', iterator.PeekChar(5));
-            Assert.AreEqual('F', iterator.PeekChar(6));
-            Assert.AreEqual('\0', iterator.PeekChar(7)); // There is no \n appended to the last line
-            Assert.AreEqual('\0', iterator.PeekChar(8));
-            Assert.AreEqual('\0', iterator.PeekChar(100));
-
-            Assert.Throws<ArgumentOutOfRangeException>(() => iterator.PeekChar(-1));
-        }
-
-        [Test]
-        public void TestIteratorSkipChar()
-        {
-            var lineGroup = new StringLineGroup(4)
-            {
-                new StringSlice("ABC", NewLine.LineFeed),
-                new StringSlice("E", NewLine.LineFeed)
-            };
-
-            Test(lineGroup.ToCharIterator());
-
-            Test(new StringSlice("ABC\nE\n"));
-
-            Test(new StringSlice("Foo\nABC\nE\n", 4, 9));
-
-            static void Test<T>(T iterator) where T : ICharIterator
-            {
-                Assert.AreEqual('A', iterator.CurrentChar); iterator.SkipChar();
-                Assert.AreEqual('B', iterator.CurrentChar); iterator.SkipChar();
-                Assert.AreEqual('C', iterator.CurrentChar); iterator.SkipChar();
-                Assert.AreEqual('\n', iterator.CurrentChar); iterator.SkipChar();
-                Assert.AreEqual('E', iterator.CurrentChar); iterator.SkipChar();
-                Assert.AreEqual('\n', iterator.CurrentChar); iterator.SkipChar();
-                Assert.AreEqual('\0', iterator.CurrentChar); iterator.SkipChar();
-                Assert.AreEqual('\0', iterator.CurrentChar); iterator.SkipChar();
-            }
+            Assert.AreEqual('A', iterator.CurrentChar); iterator.SkipChar();
+            Assert.AreEqual('B', iterator.CurrentChar); iterator.SkipChar();
+            Assert.AreEqual('C', iterator.CurrentChar); iterator.SkipChar();
+            Assert.AreEqual('\n', iterator.CurrentChar); iterator.SkipChar();
+            Assert.AreEqual('E', iterator.CurrentChar); iterator.SkipChar();
+            Assert.AreEqual('\n', iterator.CurrentChar); iterator.SkipChar();
+            Assert.AreEqual('\0', iterator.CurrentChar); iterator.SkipChar();
+            Assert.AreEqual('\0', iterator.CurrentChar); iterator.SkipChar();
         }
     }
-}
+
+    [Test]
+    public void TestStringLineGroupCharIteratorAtCapacity()
+    {
+        string str = "ABCDEFGHI";
+        var text = new StringLineGroup(1)
+        {
+            // Will store the following line at capacity
+            new StringSlice(str, NewLine.CarriageReturnLineFeed) { Start = 0, End = 2 },
+        };
+
+        var iterator = text.ToCharIterator();
+        var chars = ToString(iterator);
+        TextAssert.AreEqual("ABC\r\n", chars.ToString());
+        TextAssert.AreEqual("ABC", text.ToString());
+    }
+
+    [Test]
+    public void TestStringLineGroupCharIteratorForcingIncreaseCapacity()
+    {
+        string str = "ABCDEFGHI";
+        var text = new StringLineGroup(1)
+        {
+            // Will store the following line at capacity
+            new StringSlice(str, NewLine.CarriageReturnLineFeed) { Start = 0, End = 2 },
+
+            // Will force increase capacity to 2 and store the line at capacity
+            new StringSlice(str, NewLine.CarriageReturnLineFeed) { Start = 3, End = 3 },
+        };
+
+        var iterator = text.ToCharIterator();
+        var chars = ToString(iterator);
+        TextAssert.AreEqual("ABC\r\nD\r\n", chars.ToString());
+        TextAssert.AreEqual("ABC\r\nD", text.ToString());
+    }
+
+    [Test]
+    public void TestStringLineGroup_EnumeratorReturnsRealLines()
+    {
+        string str = "A\r\n";
+        var text = new StringLineGroup(4)
+        {
+            new StringSlice(str, NewLine.CarriageReturnLineFeed) { Start = 0, End = 0 }
+        };
+
+        var enumerator = ((IEnumerable)text).GetEnumerator();
+        Assert.True(enumerator.MoveNext());
+        StringLine currentLine = (StringLine)enumerator.Current;
+        TextAssert.AreEqual("A", currentLine.ToString());
+        Assert.False(enumerator.MoveNext());
+        
+        var nonBoxedEnumerator = text.GetEnumerator();
+
+        Assert.True(nonBoxedEnumerator.MoveNext());
+        currentLine = (StringLine)nonBoxedEnumerator.Current;
+        TextAssert.AreEqual("A", currentLine.ToString());
+        Assert.False(nonBoxedEnumerator.MoveNext());
+    }
+}

src/Markdig.Tests/TestTransformedStringCache.cs

@@ -1,102 +1,98 @@
-using System;
-using System.Linq;
 using Markdig.Helpers;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestTransformedStringCache
 {
-    public class TestTransformedStringCache
+    [Test]
+    public void GetRunsTransformationCallback()
     {
-        [Test]
-        public void GetRunsTransformationCallback()
-        {
-            var cache = new TransformedStringCache(static s => "callback-" + s);
+        var cache = new TransformedStringCache(static s => "callback-" + s);
 
-            Assert.AreEqual("callback-foo", cache.Get("foo"));
-            Assert.AreEqual("callback-bar", cache.Get("bar"));
-            Assert.AreEqual("callback-baz", cache.Get("baz"));
+        Assert.AreEqual("callback-foo", cache.Get("foo"));
+        Assert.AreEqual("callback-bar", cache.Get("bar"));
+        Assert.AreEqual("callback-baz", cache.Get("baz"));
+    }
+
+    [Test]
+    public void CachesTransformedInstance()
+    {
+        var cache = new TransformedStringCache(static s => "callback-" + s);
+
+        string transformedBar = cache.Get("bar");
+        Assert.AreSame(transformedBar, cache.Get("bar"));
+
+        string transformedFoo = cache.Get("foo".AsSpan());
+        Assert.AreSame(transformedFoo, cache.Get("foo"));
+
+        Assert.AreSame(cache.Get("baz"), cache.Get("baz".AsSpan()));
+
+        Assert.AreSame(transformedBar, cache.Get("bar"));
+        Assert.AreSame(transformedFoo, cache.Get("foo"));
+        Assert.AreSame(transformedBar, cache.Get("bar".AsSpan()));
+        Assert.AreSame(transformedFoo, cache.Get("foo".AsSpan()));
+    }
+
+    [Test]
+    public void DoesNotCacheEmptyInputs()
+    {
+        var cache = new TransformedStringCache(static s => new string('a', 4));
+
+        string cached = cache.Get("");
+        string cached2 = cache.Get("");
+        string cached3 = cache.Get(ReadOnlySpan<char>.Empty);
+
+        Assert.AreEqual("aaaa", cached);
+        Assert.AreEqual(cached, cached2);
+        Assert.AreEqual(cached, cached3);
+
+        Assert.AreNotSame(cached, cached2);
+        Assert.AreNotSame(cached, cached3);
+        Assert.AreNotSame(cached2, cached3);
+    }
+
+    [Test]
+    [TestCase(TransformedStringCache.InputLengthLimit, true)]
+    [TestCase(TransformedStringCache.InputLengthLimit + 1, false)]
+    public void DoesNotCacheLongInputs(int length, bool shouldBeCached)
+    {
+        var cache = new TransformedStringCache(static s => "callback-" + s);
+
+        string input = new string('a', length);
+
+        string cached = cache.Get(input);
+        string cached2 = cache.Get(input);
+
+        Assert.AreEqual("callback-" + input, cached);
+        Assert.AreEqual(cached, cached2);
+
+        if (shouldBeCached)
+        {
+            Assert.AreSame(cached, cached2);
         }
-
-        [Test]
-        public void CachesTransformedInstance()
+        else
         {
-            var cache = new TransformedStringCache(static s => "callback-" + s);
-
-            string transformedBar = cache.Get("bar");
-            Assert.AreSame(transformedBar, cache.Get("bar"));
-
-            string transformedFoo = cache.Get("foo".AsSpan());
-            Assert.AreSame(transformedFoo, cache.Get("foo"));
-
-            Assert.AreSame(cache.Get("baz"), cache.Get("baz".AsSpan()));
-
-            Assert.AreSame(transformedBar, cache.Get("bar"));
-            Assert.AreSame(transformedFoo, cache.Get("foo"));
-            Assert.AreSame(transformedBar, cache.Get("bar".AsSpan()));
-            Assert.AreSame(transformedFoo, cache.Get("foo".AsSpan()));
-        }
-
-        [Test]
-        public void DoesNotCacheEmptyInputs()
-        {
-            var cache = new TransformedStringCache(static s => new string('a', 4));
-
-            string cached = cache.Get("");
-            string cached2 = cache.Get("");
-            string cached3 = cache.Get(ReadOnlySpan<char>.Empty);
-
-            Assert.AreEqual("aaaa", cached);
-            Assert.AreEqual(cached, cached2);
-            Assert.AreEqual(cached, cached3);
-
             Assert.AreNotSame(cached, cached2);
-            Assert.AreNotSame(cached, cached3);
-            Assert.AreNotSame(cached2, cached3);
-        }
-
-        [Test]
-        [TestCase(TransformedStringCache.InputLengthLimit, true)]
-        [TestCase(TransformedStringCache.InputLengthLimit + 1, false)]
-        public void DoesNotCacheLongInputs(int length, bool shouldBeCached)
-        {
-            var cache = new TransformedStringCache(static s => "callback-" + s);
-
-            string input = new string('a', length);
-
-            string cached = cache.Get(input);
-            string cached2 = cache.Get(input);
-
-            Assert.AreEqual("callback-" + input, cached);
-            Assert.AreEqual(cached, cached2);
-
-            if (shouldBeCached)
-            {
-                Assert.AreSame(cached, cached2);
-            }
-            else
-            {
-                Assert.AreNotSame(cached, cached2);
-            }
-        }
-
-        [Test]
-        public void CachesAtMostNEntriesPerCharacter()
-        {
-            var cache = new TransformedStringCache(static s => "callback-" + s);
-
-            int limit = TransformedStringCache.MaxEntriesPerCharacter;
-
-            string[] a = Enumerable.Range(1, limit + 1).Select(i => $"a{i}").ToArray();
-            string[] cachedAs = a.Select(a => cache.Get(a)).ToArray();
-
-            for (int i = 0; i < limit; i++)
-            {
-                Assert.AreSame(cachedAs[i], cache.Get(a[i]));
-            }
-
-            Assert.AreNotSame(cachedAs[limit], cache.Get(a[limit]));
-
-            Assert.AreSame(cache.Get("b1"), cache.Get("b1"));
         }
     }
+
+    [Test]
+    public void CachesAtMostNEntriesPerCharacter()
+    {
+        var cache = new TransformedStringCache(static s => "callback-" + s);
+
+        int limit = TransformedStringCache.MaxEntriesPerCharacter;
+
+        string[] a = Enumerable.Range(1, limit + 1).Select(i => $"a{i}").ToArray();
+        string[] cachedAs = a.Select(a => cache.Get(a)).ToArray();
+
+        for (int i = 0; i < limit; i++)
+        {
+            Assert.AreSame(cachedAs[i], cache.Get(a[i]));
+        }
+
+        Assert.AreNotSame(cachedAs[limit], cache.Get(a[limit]));
+
+        Assert.AreSame(cache.Get("b1"), cache.Get("b1"));
+    }
 }

src/Markdig.Tests/TestYamlFrontMatterExtension.cs

@@ -1,78 +1,113 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
 using Markdig.Extensions.Yaml;
 using Markdig.Renderers;
 using Markdig.Syntax;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+public class TestYamlFrontMatterExtension
 {
-    public class TestYamlFrontMatterExtension
+    [TestCaseSource(nameof(TestCases))]
+    public void ProperYamlFrontMatterRenderersAdded(IMarkdownObjectRenderer[] objectRenderers, bool hasYamlFrontMatterHtmlRenderer, bool hasYamlFrontMatterRoundtripRenderer)
     {
-        [TestCaseSource(nameof(TestCases))]
-        public void ProperYamlFrontMatterRenderersAdded(IMarkdownObjectRenderer[] objectRenderers, bool hasYamlFrontMatterHtmlRenderer, bool hasYamlFrontMatterRoundtripRenderer)
+        var builder = new MarkdownPipelineBuilder();
+        builder.Extensions.Add(new YamlFrontMatterExtension());
+        var markdownRenderer = new DummyRenderer();
+        markdownRenderer.ObjectRenderers.AddRange(objectRenderers);
+        builder.Build().Setup(markdownRenderer);
+        Assert.That(markdownRenderer.ObjectRenderers.Contains<YamlFrontMatterHtmlRenderer>(), Is.EqualTo(hasYamlFrontMatterHtmlRenderer));
+        Assert.That(markdownRenderer.ObjectRenderers.Contains<YamlFrontMatterRoundtripRenderer>(), Is.EqualTo(hasYamlFrontMatterRoundtripRenderer));
+    }
+
+    [Test]
+    public void AllowYamlFrontMatterInMiddleOfDocument()
+    {
+        var pipeline = new MarkdownPipelineBuilder()
+            .Use(new YamlFrontMatterExtension { AllowInMiddleOfDocument = true })
+            .Build();
+
+        TestParser.TestSpec(
+            "This is a text1\n---\nthis: is a frontmatter\n---\nThis is a text2",
+            "<p>This is a text1</p>\n<p>This is a text2</p>",
+            pipeline);
+    }
+
+    private static IEnumerable<TestCaseData> TestCases()
+    {
+        yield return new TestCaseData(new IMarkdownObjectRenderer[]
         {
-            var builder = new MarkdownPipelineBuilder();
-            builder.Extensions.Add(new YamlFrontMatterExtension());
-            var markdownRenderer = new DummyRenderer();
-            markdownRenderer.ObjectRenderers.AddRange(objectRenderers);
-            builder.Build().Setup(markdownRenderer);
-            Assert.That(markdownRenderer.ObjectRenderers.Contains<YamlFrontMatterHtmlRenderer>(), Is.EqualTo(hasYamlFrontMatterHtmlRenderer));
-            Assert.That(markdownRenderer.ObjectRenderers.Contains<YamlFrontMatterRoundtripRenderer>(), Is.EqualTo(hasYamlFrontMatterRoundtripRenderer));
+        }, false, false) {TestName = "No ObjectRenderers"};
+
+        yield return new TestCaseData(new IMarkdownObjectRenderer[]
+        {
+            new Markdig.Renderers.Html.CodeBlockRenderer()
+        }, true, false) {TestName = "Html CodeBlock"};
+
+        yield return new TestCaseData(new IMarkdownObjectRenderer[]
+        {
+            new Markdig.Renderers.Roundtrip.CodeBlockRenderer()
+        }, false, true) {TestName = "Roundtrip CodeBlock"};
+
+        yield return new TestCaseData(new IMarkdownObjectRenderer[]
+        {
+            new Markdig.Renderers.Html.CodeBlockRenderer(),
+            new Markdig.Renderers.Roundtrip.CodeBlockRenderer()
+        }, true, true) {TestName = "Html/Roundtrip CodeBlock"};
+
+        yield return new TestCaseData(new IMarkdownObjectRenderer[]
+        {
+            new Markdig.Renderers.Html.CodeBlockRenderer(),
+            new Markdig.Renderers.Roundtrip.CodeBlockRenderer(),
+            new YamlFrontMatterHtmlRenderer()
+        }, true, true) {TestName = "Html/Roundtrip CodeBlock, Yaml Html"};
+
+        yield return new TestCaseData(new IMarkdownObjectRenderer[]
+        {
+            new Markdig.Renderers.Html.CodeBlockRenderer(),
+            new Markdig.Renderers.Roundtrip.CodeBlockRenderer(),
+            new YamlFrontMatterRoundtripRenderer()
+        }, true, true) { TestName = "Html/Roundtrip CodeBlock, Yaml Roundtrip" };
+    }
+
+    private class DummyRenderer : IMarkdownRenderer
+    {
+        public DummyRenderer()
+        {
+            ObjectRenderers = new ObjectRendererCollection();
         }
 
-        private static IEnumerable<TestCaseData> TestCases()
+#pragma warning disable CS0067 // ObjectWriteBefore/ObjectWriteAfter is never used
+        public event Action<IMarkdownRenderer, MarkdownObject> ObjectWriteBefore;
+        public event Action<IMarkdownRenderer, MarkdownObject> ObjectWriteAfter;
+#pragma warning restore CS0067
+
+        public ObjectRendererCollection ObjectRenderers { get; }
+        public object Render(MarkdownObject markdownObject)
         {
-            yield return new TestCaseData(new IMarkdownObjectRenderer[]
-            {
-            }, false, false) {TestName = "No ObjectRenderers"};
-
-            yield return new TestCaseData(new IMarkdownObjectRenderer[]
-            {
-                new Markdig.Renderers.Html.CodeBlockRenderer()
-            }, true, false) {TestName = "Html CodeBlock"};
-
-            yield return new TestCaseData(new IMarkdownObjectRenderer[]
-            {
-                new Markdig.Renderers.Roundtrip.CodeBlockRenderer()
-            }, false, true) {TestName = "Roundtrip CodeBlock"};
-
-            yield return new TestCaseData(new IMarkdownObjectRenderer[]
-            {
-                new Markdig.Renderers.Html.CodeBlockRenderer(),
-                new Markdig.Renderers.Roundtrip.CodeBlockRenderer()
-            }, true, true) {TestName = "Html/Roundtrip CodeBlock"};
-
-            yield return new TestCaseData(new IMarkdownObjectRenderer[]
-            {
-                new Markdig.Renderers.Html.CodeBlockRenderer(),
-                new Markdig.Renderers.Roundtrip.CodeBlockRenderer(),
-                new YamlFrontMatterHtmlRenderer()
-            }, true, true) {TestName = "Html/Roundtrip CodeBlock, Yaml Html"};
-
-            yield return new TestCaseData(new IMarkdownObjectRenderer[]
-            {
-                new Markdig.Renderers.Html.CodeBlockRenderer(),
-                new Markdig.Renderers.Roundtrip.CodeBlockRenderer(),
-                new YamlFrontMatterRoundtripRenderer()
-            }, true, true) { TestName = "Html/Roundtrip CodeBlock, Yaml Roundtrip" };
-        }
-
-        private class DummyRenderer : IMarkdownRenderer
-        {
-            public DummyRenderer()
-            {
-                ObjectRenderers = new ObjectRendererCollection();
-            }
-
-            public event Action<IMarkdownRenderer, MarkdownObject> ObjectWriteBefore;
-            public event Action<IMarkdownRenderer, MarkdownObject> ObjectWriteAfter;
-            public ObjectRendererCollection ObjectRenderers { get; }
-            public object Render(MarkdownObject markdownObject)
-            {
-                return null;
-            }
+            return null;
         }
     }
+
+    [TestCase("---\nkey1: value1\nkey2: value2\n---\n\n# Content\n")]
+    [TestCase("---\nkey1: value1\nkey2: value2\nkey3: value3\nkey4: value4\nkey5: value5\nkey6: value6\nkey7: value7\nkey8: value8\n---\n\n# Content\n")]
+    public void FrontMatterBlockLinesCharIterator(string value)
+    {
+        var builder = new MarkdownPipelineBuilder();
+        builder.Extensions.Add(new YamlFrontMatterExtension());
+        var markdownDocument = Markdown.Parse(value, builder.Build());
+
+        var yamlBlocks = markdownDocument.Descendants<YamlFrontMatterBlock>();
+        Assert.True(yamlBlocks.Any());
+
+        foreach (var yamlBlock in yamlBlocks)
+        {
+            var iterator = yamlBlock.Lines.ToCharIterator();
+            while(iterator.CurrentChar != '\0')
+            {
+                iterator.NextChar();
+            }
+        }
+
+        Assert.Pass("No exception parsing and iterating through YAML front matter block lines");
+    }
+
 }

src/Markdig.Tests/TextAssert.cs

@@ -1,119 +1,115 @@
 // Copyright (c) Alexandre Mutel. All rights reserved.
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
-using System;
 using System.Globalization;
-using System.IO;
-using NUnit.Framework;
 
-namespace Markdig.Tests
+namespace Markdig.Tests;
+
+/// <summary>
+/// Pretty text assert from https://gist.github.com/Haacked/1610603
+/// Modified version to only print +-10 characters around the first diff
+/// </summary>
+public static class TextAssert
 {
-    /// <summary>
-    /// Pretty text assert from https://gist.github.com/Haacked/1610603
-    /// Modified version to only print +-10 characters around the first diff
-    /// </summary>
-    public static class TextAssert
+    public enum DiffStyle
     {
-        public enum DiffStyle
+        Full,
+        Minimal
+    }
+
+    public static void AreEqual(string expectedValue, string actualValue)
+    {
+        AreEqual(expectedValue, actualValue, DiffStyle.Full, Console.Out);
+    }
+
+    public static void AreEqual(string expectedValue, string actualValue, DiffStyle diffStyle)
+    {
+        AreEqual(expectedValue, actualValue, diffStyle, Console.Out);
+    }
+
+    public static void AreEqual(string expectedValue, string actualValue, DiffStyle diffStyle, TextWriter output)
+    {
+        if (actualValue == null || expectedValue == null)
         {
-            Full,
-            Minimal
-        }
-
-        public static void AreEqual(string expectedValue, string actualValue)
-        {
-            AreEqual(expectedValue, actualValue, DiffStyle.Full, Console.Out);
-        }
-
-        public static void AreEqual(string expectedValue, string actualValue, DiffStyle diffStyle)
-        {
-            AreEqual(expectedValue, actualValue, diffStyle, Console.Out);
-        }
-
-        public static void AreEqual(string expectedValue, string actualValue, DiffStyle diffStyle, TextWriter output)
-        {
-            if (actualValue == null || expectedValue == null)
-            {
-                Assert.AreEqual(expectedValue, actualValue);
-                return;
-            }
-
-            if (actualValue.Equals(expectedValue, StringComparison.Ordinal))
-            {
-                return;
-            }
-
-            Console.WriteLine();
-            output.WriteLine("Index    Expected     Actual");
-            output.WriteLine("----------------------------");
-            int maxLen = Math.Max(actualValue.Length, expectedValue.Length);
-            int minLen = Math.Min(actualValue.Length, expectedValue.Length);
-
-            if (diffStyle != DiffStyle.Minimal)
-            {
-                int startDifferAt = 0;
-                for (int i = 0; i < maxLen; i++)
-                {
-                    if (i >= minLen || actualValue[i] != expectedValue[i])
-                    {
-                        startDifferAt = i;
-                        break;
-                    }
-                }
-
-                var endDifferAt = Math.Min(startDifferAt + 10, maxLen);
-                startDifferAt = Math.Max(startDifferAt - 10, 0);
-
-                bool isFirstDiff = true;
-                for (int i = startDifferAt; i < endDifferAt; i++)
-                {
-                    if (i >= minLen || actualValue[i] != expectedValue[i])
-                    {
-                        output.WriteLine("{0,-3} {1,-3}    {2,-4} {3,-3}   {4,-4} {5,-3}",
-                            i < minLen && actualValue[i] == expectedValue[i] ? " " : isFirstDiff  ? ">>>": "***",
-                            // put a mark beside a differing row
-                            i, // the index
-                            i < expectedValue.Length ? ((int) expectedValue[i]).ToString() : "",
-                            // character decimal value
-                            i < expectedValue.Length ? expectedValue[i].ToSafeString() : "", // character safe string
-                            i < actualValue.Length ? ((int) actualValue[i]).ToString() : "", // character decimal value
-                            i < actualValue.Length ? actualValue[i].ToSafeString() : "" // character safe string
-                            );
-
-                        isFirstDiff = false;
-                    }
-                }
-                //output.WriteLine();
-            }
-
             Assert.AreEqual(expectedValue, actualValue);
+            return;
         }
 
-        private static string ToSafeString(this char c)
+        if (actualValue.Equals(expectedValue, StringComparison.Ordinal))
         {
-            if (char.IsControl(c) || char.IsWhiteSpace(c))
+            return;
+        }
+
+        Console.WriteLine();
+        output.WriteLine("Index    Expected     Actual");
+        output.WriteLine("----------------------------");
+        int maxLen = Math.Max(actualValue.Length, expectedValue.Length);
+        int minLen = Math.Min(actualValue.Length, expectedValue.Length);
+
+        if (diffStyle != DiffStyle.Minimal)
+        {
+            int startDifferAt = 0;
+            for (int i = 0; i < maxLen; i++)
             {
-                switch (c)
+                if (i >= minLen || actualValue[i] != expectedValue[i])
                 {
-                    case '\b':
-                        return @"\b";
-                    case '\r':
-                        return @"\r";
-                    case '\n':
-                        return @"\n";
-                    case '\t':
-                        return @"\t";
-                    case '\a':
-                        return @"\a";
-                    case '\v':
-                        return @"\v";
-                    case '\f':
-                        return @"\f";
-                    default:
-                        return $"\\u{(int) c:X};";
+                    startDifferAt = i;
+                    break;
                 }
             }
-            return c.ToString(CultureInfo.InvariantCulture);
+
+            var endDifferAt = Math.Min(startDifferAt + 10, maxLen);
+            startDifferAt = Math.Max(startDifferAt - 10, 0);
+
+            bool isFirstDiff = true;
+            for (int i = startDifferAt; i < endDifferAt; i++)
+            {
+                if (i >= minLen || actualValue[i] != expectedValue[i])
+                {
+                    output.WriteLine("{0,-3} {1,-3}    {2,-4} {3,-3}   {4,-4} {5,-3}",
+                        i < minLen && actualValue[i] == expectedValue[i] ? " " : isFirstDiff  ? ">>>": "***",
+                        // put a mark beside a differing row
+                        i, // the index
+                        i < expectedValue.Length ? ((int) expectedValue[i]).ToString() : "",
+                        // character decimal value
+                        i < expectedValue.Length ? expectedValue[i].ToSafeString() : "", // character safe string
+                        i < actualValue.Length ? ((int) actualValue[i]).ToString() : "", // character decimal value
+                        i < actualValue.Length ? actualValue[i].ToSafeString() : "" // character safe string
+                        );
+
+                    isFirstDiff = false;
+                }
+            }
+            //output.WriteLine();
         }
+
+        Assert.AreEqual(expectedValue, actualValue);
+    }
+
+    private static string ToSafeString(this char c)
+    {
+        if (char.IsControl(c) || char.IsWhiteSpace(c))
+        {
+            switch (c)
+            {
+                case '\b':
+                    return @"\b";
+                case '\r':
+                    return @"\r";
+                case '\n':
+                    return @"\n";
+                case '\t':
+                    return @"\t";
+                case '\a':
+                    return @"\a";
+                case '\v':
+                    return @"\v";
+                case '\f':
+                    return @"\f";
+                default:
+                    return $"\\u{(int) c:X};";
+            }
+        }
+        return c.ToString(CultureInfo.InvariantCulture);
     }
 }

src/Markdig.WebApp/ApiController.cs

@@ -1,55 +1,54 @@
-using System;
 using System.Text;
+
 using Microsoft.AspNetCore.Mvc;
 
-namespace Markdig.WebApp
+namespace Markdig.WebApp;
+
+public class ApiController : Controller
 {
-    public class ApiController : Controller
+    [HttpGet()]
+    [Route("")]
+    public string Empty()
     {
-        [HttpGet()]
-        [Route("")]
-        public string Empty()
+        return string.Empty;
+    }
+
+    // GET api/to_html?text=xxx&extension=advanced
+    [Route("api/to_html")]
+    [HttpGet()]
+    public object Get([FromQuery] string text, [FromQuery] string extension)
+    {
+        try
         {
-            return string.Empty;
+            if (text == null)
+            {
+                text = string.Empty;
+            }
+
+            if (text.Length > 1000)
+            {
+                text = text.Substring(0, 1000);
+            }
+
+            var pipeline = new MarkdownPipelineBuilder().Configure(extension).Build();
+            var result = Markdown.ToHtml(text, pipeline);
+
+            return new {name = "markdig", html = result, version = Markdown.Version};
         }
-
-        // GET api/to_html?text=xxx&extension=advanced
-        [Route("api/to_html")]
-        [HttpGet()]
-        public object Get([FromQuery] string text, [FromQuery] string extension)
+        catch (Exception ex)
         {
-            try
-            {
-                if (text == null)
-                {
-                    text = string.Empty;
-                }
-
-                if (text.Length > 1000)
-                {
-                    text = text.Substring(0, 1000);
-                }
-
-                var pipeline = new MarkdownPipelineBuilder().Configure(extension).Build();
-                var result = Markdown.ToHtml(text, pipeline);
-
-                return new {name = "markdig", html = result, version = Markdown.Version};
-            }
-            catch (Exception ex)
-            {
-                return new { name = "markdig", html = "exception: " + GetPrettyMessageFromException(ex), version = Markdown.Version };
-            }
-        }
-
-        private static string GetPrettyMessageFromException(Exception exception)
-        {
-            var builder = new StringBuilder();
-            while (exception != null)
-            {
-                builder.Append(exception.Message);
-                exception = exception.InnerException;
-            }
-            return builder.ToString();
+            return new { name = "markdig", html = "exception: " + GetPrettyMessageFromException(ex), version = Markdown.Version };
         }
     }
+
+    private static string GetPrettyMessageFromException(Exception exception)
+    {
+        var builder = new StringBuilder();
+        while (exception != null)
+        {
+            builder.Append(exception.Message);
+            exception = exception.InnerException;
+        }
+        return builder.ToString();
+    }
 }

src/Markdig.WebApp/Markdig.WebApp.csproj

@@ -1,9 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <PreserveCompilationContext>true</PreserveCompilationContext>
     <AssemblyName>Markdig.WebApp</AssemblyName>
+    <ImplicitUsings>enable</ImplicitUsings>
     <OutputType>Exe</OutputType>
     <PackageId>Markdig.WebApp</PackageId>
     <ApplicationInsightsResourceId>/subscriptions/b6745039-70e7-4641-994b-5457cb220e2a/resourcegroups/Default-ApplicationInsights-EastUS/providers/microsoft.insights/components/Markdig.WebApp</ApplicationInsightsResourceId>
@@ -13,7 +14,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.20.0" />
+    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.22.0" />
   </ItemGroup>
 
   <ItemGroup>

src/Markdig.WebApp/Program.cs

@@ -1,22 +1,16 @@
-using System.IO;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.Builder;
-using Microsoft.Extensions.Hosting;
+namespace Markdig.WebApp;
 
-namespace Markdig.WebApp
+public class Program
 {
-    public class Program
+    public static void Main(string[] args)
     {
-        public static void Main(string[] args)
-        {
-            CreateHostBuilder(args).Build().Run();
-        }
-
-        public static IHostBuilder CreateHostBuilder(string[] args) =>
-            Host.CreateDefaultBuilder(args)
-                .ConfigureWebHostDefaults(webBuilder =>
-                {
-                    webBuilder.UseStartup<Startup>();
-                });
+        CreateHostBuilder(args).Build().Run();
     }
+
+    public static IHostBuilder CreateHostBuilder(string[] args) =>
+        Host.CreateDefaultBuilder(args)
+            .ConfigureWebHostDefaults(webBuilder =>
+            {
+                webBuilder.UseStartup<Startup>();
+            });
 }

src/Markdig.WebApp/Startup.cs

@@ -1,60 +1,52 @@
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Logging;
+namespace Markdig.WebApp;
 
-namespace Markdig.WebApp
+public class Startup
 {
-    public class Startup
+    public Startup(IWebHostEnvironment env)
     {
-        public Startup(IWebHostEnvironment env)
+        var builder = new ConfigurationBuilder()
+            .SetBasePath(env.ContentRootPath)
+            .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
+            .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true);
+
+        if (env.IsEnvironment("Development"))
         {
-            var builder = new ConfigurationBuilder()
-                .SetBasePath(env.ContentRootPath)
-                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
-                .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true);
-
-            if (env.IsEnvironment("Development"))
-            {
-                // This will push telemetry data through Application Insights pipeline faster, allowing you to view results immediately.
-                builder.AddApplicationInsightsSettings(developerMode: true);
-            }
-
-            builder.AddEnvironmentVariables();
-            Configuration = builder.Build();
+            // This will push telemetry data through Application Insights pipeline faster, allowing you to view results immediately.
+            builder.AddApplicationInsightsSettings(developerMode: true);
         }
 
-        public IConfigurationRoot Configuration { get; }
+        builder.AddEnvironmentVariables();
+        Configuration = builder.Build();
+    }
 
-        // This method gets called by the runtime. Use this method to add services to the container
-        public void ConfigureServices(IServiceCollection services)
+    public IConfigurationRoot Configuration { get; }
+
+    // This method gets called by the runtime. Use this method to add services to the container
+    public void ConfigureServices(IServiceCollection services)
+    {
+        services.AddControllers();
+        
+        // Add framework services.
+        services.AddApplicationInsightsTelemetry(Configuration);
+    }
+
+    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline
+    public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
+    {
+        if (env.IsDevelopment())
         {
-            services.AddControllers();
-            
-            // Add framework services.
-            services.AddApplicationInsightsTelemetry(Configuration);
+            app.UseDeveloperExceptionPage();
         }
 
-        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline
-        public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
+        app.UseHttpsRedirection();
+
+        app.UseRouting();
+
+        app.UseAuthorization();
+
+        app.UseEndpoints(endpoints =>
         {
-            if (env.IsDevelopment())
-            {
-                app.UseDeveloperExceptionPage();
-            }
-
-            app.UseHttpsRedirection();
-
-            app.UseRouting();
-
-            app.UseAuthorization();
-
-            app.UseEndpoints(endpoints =>
-            {
-                endpoints.MapControllers();
-            });
-        }
+            endpoints.MapControllers();
+        });
     }
 }

src/Markdig/Extensions/Abbreviations/Abbreviation.cs

@@ -7,36 +7,35 @@ using Markdig.Helpers;
 using Markdig.Parsers;
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.Abbreviations
+namespace Markdig.Extensions.Abbreviations;
+
+/// <summary>
+/// An abbreviation object stored at the document level. See extension methods in <see cref="AbbreviationHelper"/>.
+/// </summary>
+/// <seealso cref="LeafBlock" />
+[DebuggerDisplay("Abbr {Label} => {Text}")]
+public class Abbreviation : LeafBlock
 {
     /// <summary>
-    /// An abbreviation object stored at the document level. See extension methods in <see cref="AbbreviationHelper"/>.
+    /// Initializes a new instance of the <see cref="Abbreviation"/> class.
     /// </summary>
-    /// <seealso cref="LeafBlock" />
-    [DebuggerDisplay("Abbr {Label} => {Text}")]
-    public class Abbreviation : LeafBlock
+    /// <param name="parser">The parser used to create this block.</param>
+    public Abbreviation(BlockParser parser) : base(parser)
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="Abbreviation"/> class.
-        /// </summary>
-        /// <param name="parser">The parser used to create this block.</param>
-        public Abbreviation(BlockParser parser) : base(parser)
-        {
-        }
-
-        /// <summary>
-        /// Gets or sets the label.
-        /// </summary>
-        public string? Label { get; set; }
-
-        /// <summary>
-        /// The text associated to this label.
-        /// </summary>
-        public StringSlice Text;
-
-        /// <summary>
-        /// The label span
-        /// </summary>
-        public SourceSpan LabelSpan;
     }
+
+    /// <summary>
+    /// Gets or sets the label.
+    /// </summary>
+    public string? Label { get; set; }
+
+    /// <summary>
+    /// The text associated to this label.
+    /// </summary>
+    public StringSlice Text;
+
+    /// <summary>
+    /// The label span
+    /// </summary>
+    public SourceSpan LabelSpan;
 }

src/Markdig/Extensions/Abbreviations/AbbreviationExtension.cs

@@ -4,26 +4,25 @@
 
 using Markdig.Renderers;
 
-namespace Markdig.Extensions.Abbreviations
-{
-    /// <summary>
-    /// Extension to allow abbreviations.
-    /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class AbbreviationExtension : IMarkdownExtension
-    {
-        public void Setup(MarkdownPipelineBuilder pipeline)
-        {
-            pipeline.BlockParsers.AddIfNotAlready<AbbreviationParser>();
-        }
+namespace Markdig.Extensions.Abbreviations;
 
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+/// <summary>
+/// Extension to allow abbreviations.
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class AbbreviationExtension : IMarkdownExtension
+{
+    public void Setup(MarkdownPipelineBuilder pipeline)
+    {
+        pipeline.BlockParsers.AddIfNotAlready<AbbreviationParser>();
+    }
+
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+        if (renderer is HtmlRenderer htmlRenderer && !htmlRenderer.ObjectRenderers.Contains<HtmlAbbreviationRenderer>())
         {
-            if (renderer is HtmlRenderer htmlRenderer && !htmlRenderer.ObjectRenderers.Contains<HtmlAbbreviationRenderer>())
-            {
-                // Must be inserted before CodeBlockRenderer
-                htmlRenderer.ObjectRenderers.Insert(0, new HtmlAbbreviationRenderer());
-            }
+            // Must be inserted before CodeBlockRenderer
+            htmlRenderer.ObjectRenderers.Insert(0, new HtmlAbbreviationRenderer());
         }
     }
 }

src/Markdig/Extensions/Abbreviations/AbbreviationHelper.cs

@@ -2,42 +2,40 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using System.Collections.Generic;
 using Markdig.Helpers;
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.Abbreviations
+namespace Markdig.Extensions.Abbreviations;
+
+/// <summary>
+/// Extension methods for <see cref="Abbreviation"/>.
+/// </summary>
+public static class AbbreviationHelper
 {
-    /// <summary>
-    /// Extension methods for <see cref="Abbreviation"/>.
-    /// </summary>
-    public static class AbbreviationHelper
+    private static readonly object DocumentKey = typeof (Abbreviation);
+
+    public static bool HasAbbreviations(this MarkdownDocument document)
     {
-        private static readonly object DocumentKey = typeof (Abbreviation);
+        return document.GetAbbreviations() != null;
+    }
 
-        public static bool HasAbbreviations(this MarkdownDocument document)
+    public static void AddAbbreviation(this MarkdownDocument document, string label, Abbreviation abbr)
+    {
+        if (document is null) ThrowHelper.ArgumentNullException(nameof(document));
+        if (label is null) ThrowHelper.ArgumentNullException_label();
+        if (abbr is null) ThrowHelper.ArgumentNullException(nameof(abbr));
+
+        var map = document.GetAbbreviations();
+        if (map is null)
         {
-            return document.GetAbbreviations() != null;
+            map = new Dictionary<string, Abbreviation>();
+            document.SetData(DocumentKey, map);
         }
+        map[label] = abbr;
+    }
 
-        public static void AddAbbreviation(this MarkdownDocument document, string label, Abbreviation abbr)
-        {
-            if (document is null) ThrowHelper.ArgumentNullException(nameof(document));
-            if (label is null) ThrowHelper.ArgumentNullException_label();
-            if (abbr is null) ThrowHelper.ArgumentNullException(nameof(abbr));
-
-            var map = document.GetAbbreviations();
-            if (map is null)
-            {
-                map = new Dictionary<string, Abbreviation>();
-                document.SetData(DocumentKey, map);
-            }
-            map[label] = abbr;
-        }
-
-        public static Dictionary<string, Abbreviation>? GetAbbreviations(this MarkdownDocument document)
-        {
-            return document.GetData(DocumentKey) as Dictionary<string, Abbreviation>;
-        }
+    public static Dictionary<string, Abbreviation>? GetAbbreviations(this MarkdownDocument document)
+    {
+        return document.GetData(DocumentKey) as Dictionary<string, Abbreviation>;
     }
 }

src/Markdig/Extensions/Abbreviations/AbbreviationInline.cs

@@ -5,24 +5,23 @@
 using System.Diagnostics;
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.Abbreviations
+namespace Markdig.Extensions.Abbreviations;
+
+/// <summary>
+/// The inline abbreviation.
+/// </summary>
+/// <seealso cref="LeafInline" />
+[DebuggerDisplay("{Abbreviation}")]
+public class AbbreviationInline : LeafInline
 {
     /// <summary>
-    /// The inline abbreviation.
+    /// Initializes a new instance of the <see cref="AbbreviationInline"/> class.
     /// </summary>
-    /// <seealso cref="LeafInline" />
-    [DebuggerDisplay("{Abbreviation}")]
-    public class AbbreviationInline : LeafInline
+    /// <param name="abbreviation">The abbreviation.</param>
+    public AbbreviationInline(Abbreviation abbreviation)
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="AbbreviationInline"/> class.
-        /// </summary>
-        /// <param name="abbreviation">The abbreviation.</param>
-        public AbbreviationInline(Abbreviation abbreviation)
-        {
-            Abbreviation = abbreviation;
-        }
-
-        public Abbreviation Abbreviation { get; set; }
+        Abbreviation = abbreviation;
     }
+
+    public Abbreviation Abbreviation { get; set; }
 }

src/Markdig/Extensions/Abbreviations/AbbreviationParser.cs

@@ -2,225 +2,222 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using System;
-using System.Collections.Generic;
 using Markdig.Helpers;
 using Markdig.Parsers;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.Abbreviations
+namespace Markdig.Extensions.Abbreviations;
+
+/// <summary>
+/// A block parser for abbreviations.
+/// </summary>
+/// <seealso cref="BlockParser" />
+public class AbbreviationParser : BlockParser
 {
     /// <summary>
-    /// A block parser for abbreviations.
+    /// Initializes a new instance of the <see cref="AbbreviationParser"/> class.
     /// </summary>
-    /// <seealso cref="BlockParser" />
-    public class AbbreviationParser : BlockParser
+    public AbbreviationParser()
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="AbbreviationParser"/> class.
-        /// </summary>
-        public AbbreviationParser()
+        OpeningCharacters = ['*'];
+    }
+
+    public override BlockState TryOpen(BlockProcessor processor)
+    {
+        if (processor.IsCodeIndent)
         {
-            OpeningCharacters = new[] { '*' };
+            return BlockState.None;
         }
 
-        public override BlockState TryOpen(BlockProcessor processor)
+        // A link must be of the form *[Some Text]: An abbreviation 
+        var slice = processor.Line;
+        var startPosition = slice.Start;
+        var c = slice.NextChar();
+        if (c != '[')
         {
-            if (processor.IsCodeIndent)
-            {
-                return BlockState.None;
-            }
-
-            // A link must be of the form *[Some Text]: An abbreviation 
-            var slice = processor.Line;
-            var startPosition = slice.Start;
-            var c = slice.NextChar();
-            if (c != '[')
-            {
-                return BlockState.None;
-            }
-
-            if (!LinkHelper.TryParseLabel(ref slice, out string? label, out SourceSpan labelSpan))
-            {
-                return BlockState.None;
-            }
-
-            c = slice.CurrentChar;
-            if (c != ':')
-            {
-                return BlockState.None;
-            }
-            slice.SkipChar();
-
-            slice.Trim();
-
-            var abbr = new Abbreviation(this)
-            {
-                Label = label,
-                Text = slice,
-                Span = new SourceSpan(startPosition, slice.End),
-                Line = processor.LineIndex,
-                Column = processor.Column,
-                LabelSpan = labelSpan,
-            };
-            if (!processor.Document.HasAbbreviations())
-            {
-                processor.Document.ProcessInlinesBegin += DocumentOnProcessInlinesBegin;
-            }
-            processor.Document.AddAbbreviation(abbr.Label, abbr);
-
-            return BlockState.BreakDiscard;
+            return BlockState.None;
         }
 
-        private void DocumentOnProcessInlinesBegin(InlineProcessor inlineProcessor, Inline? inline)
+        if (!LinkHelper.TryParseLabel(ref slice, out string? label, out SourceSpan labelSpan))
         {
-            inlineProcessor.Document.ProcessInlinesBegin -= DocumentOnProcessInlinesBegin;
+            return BlockState.None;
+        }
 
-            var abbreviations = inlineProcessor.Document.GetAbbreviations();
-            // Should not happen, but another extension could decide to remove them, so...
-            if (abbreviations is null)
+        c = slice.CurrentChar;
+        if (c != ':')
+        {
+            return BlockState.None;
+        }
+        slice.SkipChar();
+
+        slice.Trim();
+
+        var abbr = new Abbreviation(this)
+        {
+            Label = label,
+            Text = slice,
+            Span = new SourceSpan(startPosition, slice.End),
+            Line = processor.LineIndex,
+            Column = processor.Column,
+            LabelSpan = labelSpan,
+        };
+        if (!processor.Document.HasAbbreviations())
+        {
+            processor.Document.ProcessInlinesBegin += DocumentOnProcessInlinesBegin;
+        }
+        processor.Document.AddAbbreviation(abbr.Label, abbr);
+
+        return BlockState.BreakDiscard;
+    }
+
+    private void DocumentOnProcessInlinesBegin(InlineProcessor inlineProcessor, Inline? inline)
+    {
+        inlineProcessor.Document.ProcessInlinesBegin -= DocumentOnProcessInlinesBegin;
+
+        var abbreviations = inlineProcessor.Document.GetAbbreviations();
+        // Should not happen, but another extension could decide to remove them, so...
+        if (abbreviations is null)
+        {
+            return;
+        }
+
+        // Build a text matcher from the abbreviations labels
+        var prefixTree = new CompactPrefixTree<Abbreviation>(abbreviations);
+
+        inlineProcessor.LiteralInlineParser.PostMatch += (InlineProcessor processor, ref StringSlice slice) =>
+        {
+            var literal = (LiteralInline)processor.Inline!;
+            var originalLiteral = literal;
+
+            ContainerInline? container = null;
+
+            // This is slow, but we don't have much the choice
+            var content = literal.Content;
+            var text = content.Text;
+
+            for (int i = content.Start; i <= content.End; i++)
             {
-                return;
-            }
-
-            // Build a text matcher from the abbreviations labels
-            var prefixTree = new CompactPrefixTree<Abbreviation>(abbreviations);
-
-            inlineProcessor.LiteralInlineParser.PostMatch += (InlineProcessor processor, ref StringSlice slice) =>
-            {
-                var literal = (LiteralInline)processor.Inline!;
-                var originalLiteral = literal;
-
-                ContainerInline? container = null;
-
-                // This is slow, but we don't have much the choice
-                var content = literal.Content;
-                var text = content.Text;
-
-                for (int i = content.Start; i <= content.End; i++)
+                // Abbreviation must be a whole word == start at the start of a line or after a whitespace
+                if (i != 0)
                 {
-                    // Abbreviation must be a whole word == start at the start of a line or after a whitespace
-                    if (i != 0)
+                    for (i = i - 1; i <= content.End; i++)
                     {
-                        for (i = i - 1; i <= content.End; i++)
+                        if (text[i].IsWhitespace())
                         {
-                            if (text[i].IsWhitespace())
-                            {
-                                i++;
-                                goto ValidAbbreviationStart;
-                            }
+                            i++;
+                            goto ValidAbbreviationStart;
                         }
-                        break;
-                    }
-
-                ValidAbbreviationStart:;
-
-                    if (prefixTree.TryMatchLongest(text.AsSpan(i, content.End - i + 1), out KeyValuePair<string, Abbreviation> abbreviationMatch))
-                    {
-                        var match = abbreviationMatch.Key;
-                        if (!IsValidAbbreviationEnding(match, content, i))
-                        {
-                            continue;
-                        }
-
-                        var indexAfterMatch = i + match.Length;
-
-                        // If we don't have a container, create a new one
-                        if (container is null)
-                        {
-                            container = literal.Parent ??
-                                new ContainerInline
-                                {
-                                    Span = originalLiteral.Span,
-                                    Line = originalLiteral.Line,
-                                    Column = originalLiteral.Column,
-                                };
-                        }
-
-                        var abbrInline = new AbbreviationInline(abbreviationMatch.Value)
-                        {
-                            Span =
-                            {
-                                Start = processor.GetSourcePosition(i, out int line, out int column),
-                            },
-                            Line = line,
-                            Column = column
-                        };
-                        abbrInline.Span.End = abbrInline.Span.Start + match.Length - 1;
-
-                        // Append the previous literal
-                        if (i > content.Start && literal.Parent is null)
-                        {
-                            container.AppendChild(literal);
-                        }
-
-                        literal.Span.End = abbrInline.Span.Start - 1;
-                        // Truncate it before the abbreviation
-                        literal.Content.End = i - 1;
-
-
-                        // Append the abbreviation
-                        container.AppendChild(abbrInline);
-
-                        // If this is the end of the string, clear the literal and exit
-                        if (content.End == indexAfterMatch - 1)
-                        {
-                            literal = null;
-                            break;
-                        }
-
-                        // Process the remaining literal
-                        literal = new LiteralInline()
-                        {
-                            Span = new SourceSpan(abbrInline.Span.End + 1, literal.Span.End),
-                            Line = line,
-                            Column = column + match.Length,
-                        };
-                        content.Start = indexAfterMatch;
-                        literal.Content = content;
-
-                        i = indexAfterMatch - 1;
                     }
+                    break;
                 }
 
-                if (container != null)
+            ValidAbbreviationStart:;
+
+                if (prefixTree.TryMatchLongest(text.AsSpan(i, content.End - i + 1), out KeyValuePair<string, Abbreviation> abbreviationMatch))
                 {
-                    if (literal != null)
+                    var match = abbreviationMatch.Key;
+                    if (!IsValidAbbreviationEnding(match, content, i))
+                    {
+                        continue;
+                    }
+
+                    var indexAfterMatch = i + match.Length;
+
+                    // If we don't have a container, create a new one
+                    if (container is null)
+                    {
+                        container = literal.Parent ??
+                            new ContainerInline
+                            {
+                                Span = originalLiteral.Span,
+                                Line = originalLiteral.Line,
+                                Column = originalLiteral.Column,
+                            };
+                    }
+
+                    var abbrInline = new AbbreviationInline(abbreviationMatch.Value)
+                    {
+                        Span =
+                        {
+                            Start = processor.GetSourcePosition(i, out int line, out int column),
+                        },
+                        Line = line,
+                        Column = column
+                    };
+                    abbrInline.Span.End = abbrInline.Span.Start + match.Length - 1;
+
+                    // Append the previous literal
+                    if (i > content.Start && literal.Parent is null)
                     {
                         container.AppendChild(literal);
                     }
-                    processor.Inline = container;
-                }
-            };
-        }
 
-        private static bool IsValidAbbreviationEnding(string match, StringSlice content, int matchIndex)
-        {
-            // This will check if the next char at the end of the StringSlice is whitespace, punctuation or \0.
-            var contentNew = content;
-            contentNew.End = content.End + 1;
-            int index = matchIndex + match.Length;
-            while (index <= contentNew.End)
-            {
-                var c = contentNew.PeekCharAbsolute(index);
-                if (!(c == '\0' || c.IsWhitespace() || c.IsAsciiPunctuation()))
-                {
-                    return false;
-                }
+                    literal.Span.End = abbrInline.Span.Start - 1;
+                    // Truncate it before the abbreviation
+                    literal.Content.End = i - 1;
 
-                if (c.IsAlphaNumeric())
-                {
-                    return false;
-                }
 
-                if (c.IsWhitespace())
-                {
-                    break;
+                    // Append the abbreviation
+                    container.AppendChild(abbrInline);
+
+                    // If this is the end of the string, clear the literal and exit
+                    if (content.End == indexAfterMatch - 1)
+                    {
+                        literal = null;
+                        break;
+                    }
+
+                    // Process the remaining literal
+                    literal = new LiteralInline()
+                    {
+                        Span = new SourceSpan(abbrInline.Span.End + 1, literal.Span.End),
+                        Line = line,
+                        Column = column + match.Length,
+                    };
+                    content.Start = indexAfterMatch;
+                    literal.Content = content;
+
+                    i = indexAfterMatch - 1;
                 }
-                index++;
             }
-            return true;
+
+            if (container != null)
+            {
+                if (literal != null)
+                {
+                    container.AppendChild(literal);
+                }
+                processor.Inline = container;
+            }
+        };
+    }
+
+    private static bool IsValidAbbreviationEnding(string match, StringSlice content, int matchIndex)
+    {
+        // This will check if the next char at the end of the StringSlice is whitespace, punctuation or \0.
+        var contentNew = content;
+        contentNew.End = content.End + 1;
+        int index = matchIndex + match.Length;
+        while (index <= contentNew.End)
+        {
+            var c = contentNew.PeekCharAbsolute(index);
+            if (!(c == '\0' || c.IsWhitespace() || c.IsAsciiPunctuation()))
+            {
+                return false;
+            }
+
+            if (c.IsAlphaNumeric())
+            {
+                return false;
+            }
+
+            if (c.IsWhitespace())
+            {
+                break;
+            }
+            index++;
         }
+        return true;
     }
 }

src/Markdig/Extensions/Abbreviations/HtmlAbbreviationRenderer.cs

@@ -5,27 +5,26 @@
 using Markdig.Renderers;
 using Markdig.Renderers.Html;
 
-namespace Markdig.Extensions.Abbreviations
+namespace Markdig.Extensions.Abbreviations;
+
+/// <summary>
+/// A HTML renderer for a <see cref="AbbreviationInline"/>.
+/// </summary>
+/// <seealso cref="HtmlObjectRenderer{CustomContainer}" />
+public class HtmlAbbreviationRenderer : HtmlObjectRenderer<AbbreviationInline>
 {
-    /// <summary>
-    /// A HTML renderer for a <see cref="AbbreviationInline"/>.
-    /// </summary>
-    /// <seealso cref="HtmlObjectRenderer{CustomContainer}" />
-    public class HtmlAbbreviationRenderer : HtmlObjectRenderer<AbbreviationInline>
+    protected override void Write(HtmlRenderer renderer, AbbreviationInline obj)
     {
-        protected override void Write(HtmlRenderer renderer, AbbreviationInline obj)
+        // <abbr title="Hyper Text Markup Language">HTML</abbr>
+        var abbr = obj.Abbreviation;
+        if (renderer.EnableHtmlForInline)
         {
-            // <abbr title="Hyper Text Markup Language">HTML</abbr>
-            var abbr = obj.Abbreviation;
-            if (renderer.EnableHtmlForInline)
-            {
-                renderer.Write("<abbr").WriteAttributes(obj).Write(" title=\"").WriteEscape(ref abbr.Text).Write("\">");
-            }
-            renderer.Write(abbr.Label);
-            if (renderer.EnableHtmlForInline)
-            {
-                renderer.Write("</abbr>");
-            }
+            renderer.Write("<abbr").WriteAttributes(obj).Write(" title=\"").WriteEscape(ref abbr.Text).Write("\">");
+        }
+        renderer.Write(abbr.Label);
+        if (renderer.EnableHtmlForInline)
+        {
+            renderer.Write("</abbr>");
         }
     }
 }

src/Markdig/Extensions/AutoIdentifiers/AutoIdentifierExtension.cs

@@ -2,8 +2,6 @@
 // This file is licensed under the BSD-Clause 2 license.
 // See the license.txt file in the project root for more information.
 
-using System.Collections.Generic;
-using System.IO;
 using Markdig.Helpers;
 using Markdig.Parsers;
 using Markdig.Renderers;
@@ -11,206 +9,210 @@ using Markdig.Renderers.Html;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.AutoIdentifiers
+namespace Markdig.Extensions.AutoIdentifiers;
+
+/// <summary>
+/// The auto-identifier extension
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class AutoIdentifierExtension : IMarkdownExtension
 {
+    private const string AutoIdentifierKey = "AutoIdentifier";
+
+    private static readonly StripRendererCache _rendererCache = new();
+
+    private readonly AutoIdentifierOptions _options;
+
     /// <summary>
-    /// The auto-identifier extension
+    /// Initializes a new instance of the <see cref="AutoIdentifierExtension"/> class.
     /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class AutoIdentifierExtension : IMarkdownExtension
+    /// <param name="options">The options.</param>
+    public AutoIdentifierExtension(AutoIdentifierOptions options)
     {
-        private const string AutoIdentifierKey = "AutoIdentifier";
-        private readonly AutoIdentifierOptions options;
-        private readonly StripRendererCache rendererCache = new StripRendererCache();
+        _options = options;
+    }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="AutoIdentifierExtension"/> class.
-        /// </summary>
-        /// <param name="options">The options.</param>
-        public AutoIdentifierExtension(AutoIdentifierOptions options)
+    public void Setup(MarkdownPipelineBuilder pipeline)
+    {
+        var headingBlockParser = pipeline.BlockParsers.Find<HeadingBlockParser>();
+        if (headingBlockParser != null)
         {
-            this.options = options;
+            // Install a hook on the HeadingBlockParser when a HeadingBlock is actually processed
+            headingBlockParser.Closed -= HeadingBlockParser_Closed;
+            headingBlockParser.Closed += HeadingBlockParser_Closed;
+        }
+        var paragraphBlockParser = pipeline.BlockParsers.FindExact<ParagraphBlockParser>();
+        if (paragraphBlockParser != null)
+        {
+            // Install a hook on the ParagraphBlockParser when a HeadingBlock is actually processed as a Setex heading
+            paragraphBlockParser.Closed -= HeadingBlockParser_Closed;
+            paragraphBlockParser.Closed += HeadingBlockParser_Closed;
+        }
+    }
+
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+    }
+
+    /// <summary>
+    /// Process on a new <see cref="HeadingBlock"/>
+    /// </summary>
+    /// <param name="processor">The processor.</param>
+    /// <param name="block">The heading block.</param>
+    private void HeadingBlockParser_Closed(BlockProcessor processor, Block block)
+    {
+        // We may have a ParagraphBlock here as we have a hook on the ParagraphBlockParser
+        if (!(block is HeadingBlock headingBlock))
+        {
+            return;
         }
 
-        public void Setup(MarkdownPipelineBuilder pipeline)
+        // If the AutoLink options is set, we register a LinkReferenceDefinition at the document level
+        if ((_options & AutoIdentifierOptions.AutoLink) != 0)
         {
-            var headingBlockParser = pipeline.BlockParsers.Find<HeadingBlockParser>();
-            if (headingBlockParser != null)
+            var headingLine = headingBlock.Lines.Lines[0];
+
+            var text = headingLine.ToString();
+
+            var linkRef = new HeadingLinkReferenceDefinition(headingBlock)
             {
-                // Install a hook on the HeadingBlockParser when a HeadingBlock is actually processed
-                headingBlockParser.Closed -= HeadingBlockParser_Closed;
-                headingBlockParser.Closed += HeadingBlockParser_Closed;
-            }
-            var paragraphBlockParser = pipeline.BlockParsers.FindExact<ParagraphBlockParser>();
-            if (paragraphBlockParser != null)
-            {
-                // Install a hook on the ParagraphBlockParser when a HeadingBlock is actually processed as a Setex heading
-                paragraphBlockParser.Closed -= HeadingBlockParser_Closed;
-                paragraphBlockParser.Closed += HeadingBlockParser_Closed;
-            }
-        }
-
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
-        {
-        }
-
-        /// <summary>
-        /// Process on a new <see cref="HeadingBlock"/>
-        /// </summary>
-        /// <param name="processor">The processor.</param>
-        /// <param name="block">The heading block.</param>
-        private void HeadingBlockParser_Closed(BlockProcessor processor, Block block)
-        {
-            // We may have a ParagraphBlock here as we have a hook on the ParagraphBlockParser
-            if (!(block is HeadingBlock headingBlock))
-            {
-                return;
-            }
-
-            // If the AutoLink options is set, we register a LinkReferenceDefinition at the document level
-            if ((options & AutoIdentifierOptions.AutoLink) != 0)
-            {
-                var headingLine = headingBlock.Lines.Lines[0];
-
-                var text = headingLine.ToString();
-
-                var linkRef = new HeadingLinkReferenceDefinition(headingBlock)
-                {
-                    CreateLinkInline = CreateLinkInlineForHeading
-                };
-
-                var doc = processor.Document;
-                var dictionary = doc.GetData(this) as Dictionary<string, HeadingLinkReferenceDefinition>;
-                if (dictionary is null)
-                {
-                    dictionary = new Dictionary<string, HeadingLinkReferenceDefinition>();
-                    doc.SetData(this, dictionary);
-                    doc.ProcessInlinesBegin += DocumentOnProcessInlinesBegin;
-                }
-                dictionary[text] = linkRef;
-            }
-
-            // Then we register after inline have been processed to actually generate the proper #id
-            headingBlock.ProcessInlinesEnd += HeadingBlock_ProcessInlinesEnd;
-        }
-
-        private void DocumentOnProcessInlinesBegin(InlineProcessor processor, Inline? inline)
-        {
-            var doc = processor.Document;
-            doc.ProcessInlinesBegin -= DocumentOnProcessInlinesBegin;
-            var dictionary = (Dictionary<string, HeadingLinkReferenceDefinition>)doc.GetData(this)!;
-            foreach (var keyPair in dictionary)
-            {
-                // Here we make sure that auto-identifiers will not override an existing link definition
-                // defined in the document
-                // If it is the case, we skip the auto identifier for the Heading
-                if (!doc.TryGetLinkReferenceDefinition(keyPair.Key, out var linkDef))
-                {
-                    doc.SetLinkReferenceDefinition(keyPair.Key, keyPair.Value, true);
-                }
-            }
-            // Once we are done, we don't need to keep the intermediate dictionary around
-            doc.RemoveData(this);
-        }
-
-        /// <summary>
-        /// Callback when there is a reference to found to a heading.
-        /// Note that reference are only working if they are declared after.
-        /// </summary>
-        private Inline CreateLinkInlineForHeading(InlineProcessor inlineState, LinkReferenceDefinition linkRef, Inline? child)
-        {
-            var headingRef = (HeadingLinkReferenceDefinition) linkRef;
-            return new LinkInline()
-            {
-                // Use GetDynamicUrl to allow late binding of the Url (as a link may occur before the heading is declared and
-                // the inlines of the heading are actually processed by HeadingBlock_ProcessInlinesEnd)
-                GetDynamicUrl = () => HtmlHelper.Unescape("#" + headingRef.Heading.GetAttributes().Id),
-                Title = HtmlHelper.Unescape(linkRef.Title),
+                CreateLinkInline = CreateLinkInlineForHeading
             };
+
+            var doc = processor.Document;
+            var dictionary = doc.GetData(this) as Dictionary<string, HeadingLinkReferenceDefinition>;
+            if (dictionary is null)
+            {
+                dictionary = new Dictionary<string, HeadingLinkReferenceDefinition>();
+                doc.SetData(this, dictionary);
+                doc.ProcessInlinesBegin += DocumentOnProcessInlinesBegin;
+            }
+            dictionary[text] = linkRef;
         }
 
-        /// <summary>
-        /// Process the inlines of the heading to create a unique identifier
-        /// </summary>
-        /// <param name="processor">The processor.</param>
-        /// <param name="inline">The inline.</param>
-        private void HeadingBlock_ProcessInlinesEnd(InlineProcessor processor, Inline? inline)
+        // Then we register after inline have been processed to actually generate the proper #id
+        headingBlock.ProcessInlinesEnd += HeadingBlock_ProcessInlinesEnd;
+    }
+
+    private void DocumentOnProcessInlinesBegin(InlineProcessor processor, Inline? inline)
+    {
+        var doc = processor.Document;
+        doc.ProcessInlinesBegin -= DocumentOnProcessInlinesBegin;
+        var dictionary = (Dictionary<string, HeadingLinkReferenceDefinition>)doc.GetData(this)!;
+        foreach (var keyPair in dictionary)
         {
-            var identifiers = processor.Document.GetData(AutoIdentifierKey) as HashSet<string>;
-            if (identifiers is null)
+            // Here we make sure that auto-identifiers will not override an existing link definition
+            // defined in the document
+            // If it is the case, we skip the auto identifier for the Heading
+            if (!doc.TryGetLinkReferenceDefinition(keyPair.Key, out var linkDef))
             {
-                identifiers = new HashSet<string>();
-                processor.Document.SetData(AutoIdentifierKey, identifiers);
+                doc.SetLinkReferenceDefinition(keyPair.Key, keyPair.Value, true);
             }
+        }
+        // Once we are done, we don't need to keep the intermediate dictionary around
+        doc.RemoveData(this);
+    }
 
-            var headingBlock = (HeadingBlock) processor.Block!;
-            if (headingBlock.Inline is null)
-            {
-                return;
-            }
+    /// <summary>
+    /// Callback when there is a reference to found to a heading.
+    /// Note that reference are only working if they are declared after.
+    /// </summary>
+    private Inline CreateLinkInlineForHeading(InlineProcessor inlineState, LinkReferenceDefinition linkRef, Inline? child)
+    {
+        var headingRef = (HeadingLinkReferenceDefinition) linkRef;
+        return new LinkInline()
+        {
+            // Use GetDynamicUrl to allow late binding of the Url (as a link may occur before the heading is declared and
+            // the inlines of the heading are actually processed by HeadingBlock_ProcessInlinesEnd)
+            GetDynamicUrl = () => HtmlHelper.Unescape("#" + headingRef.Heading.GetAttributes().Id),
+            Title = HtmlHelper.Unescape(linkRef.Title),
+        };
+    }
 
-            // If id is already set, don't try to modify it
-            var attributes = processor.Block!.GetAttributes();
-            if (attributes.Id != null)
-            {
-                return;
-            }
-
-            // Use internally a HtmlRenderer to strip links from a heading
-            var stripRenderer = rendererCache.Get();
-
-            stripRenderer.Render(headingBlock.Inline);
-            var headingText = stripRenderer.Writer.ToString()!;
-            rendererCache.Release(stripRenderer);
-
-            // Urilize the link
-            headingText = (options & AutoIdentifierOptions.GitHub) != 0
-                ? LinkHelper.UrilizeAsGfm(headingText)
-                : LinkHelper.Urilize(headingText, (options & AutoIdentifierOptions.AllowOnlyAscii) != 0);
-
-            // If the heading is empty, use the word "section" instead
-            var baseHeadingId = string.IsNullOrEmpty(headingText) ? "section" : headingText;
-
-            // Add a trailing -1, -2, -3...etc. in case of collision
-            var headingId = baseHeadingId;
-            if (!identifiers.Add(headingId))
-            {
-                var headingBuffer = new ValueStringBuilder(stackalloc char[ValueStringBuilder.StackallocThreshold]);
-                headingBuffer.Append(baseHeadingId);
-                headingBuffer.Append('-');
-                uint index = 0;
-                do
-                {
-                    index++;
-                    headingBuffer.Append(index);
-                    headingId = headingBuffer.AsSpan().ToString();
-                    headingBuffer.Length = baseHeadingId.Length + 1;
-                }
-                while (!identifiers.Add(headingId));
-                headingBuffer.Dispose();
-            }
-
-            attributes.Id = headingId;
+    /// <summary>
+    /// Process the inlines of the heading to create a unique identifier
+    /// </summary>
+    /// <param name="processor">The processor.</param>
+    /// <param name="inline">The inline.</param>
+    private void HeadingBlock_ProcessInlinesEnd(InlineProcessor processor, Inline? inline)
+    {
+        var identifiers = processor.Document.GetData(AutoIdentifierKey) as HashSet<string>;
+        if (identifiers is null)
+        {
+            identifiers = new HashSet<string>();
+            processor.Document.SetData(AutoIdentifierKey, identifiers);
         }
 
-        private sealed class StripRendererCache : ObjectCache<HtmlRenderer>
+        var headingBlock = (HeadingBlock) processor.Block!;
+        if (headingBlock.Inline is null)
         {
-            protected override HtmlRenderer NewInstance()
-            {
-                var headingWriter = new StringWriter();
-                var stripRenderer = new HtmlRenderer(headingWriter)
-                {
-                    // Set to false both to avoid having any HTML tags in the output
-                    EnableHtmlForInline = false,
-                    EnableHtmlEscape = false
-                };
-                return stripRenderer;
-            }
+            return;
+        }
 
-            protected override void Reset(HtmlRenderer instance)
+        // If id is already set, don't try to modify it
+        var attributes = processor.Block!.GetAttributes();
+        if (attributes.Id != null)
+        {
+            return;
+        }
+
+        // Use internally a HtmlRenderer to strip links from a heading
+        var stripRenderer = _rendererCache.Get();
+
+        stripRenderer.Render(headingBlock.Inline);
+        ReadOnlySpan<char> rawHeadingText = ((FastStringWriter)stripRenderer.Writer).AsSpan();
+
+        // Urilize the link
+        string headingText = (_options & AutoIdentifierOptions.GitHub) != 0
+            ? LinkHelper.UrilizeAsGfm(rawHeadingText)
+            : LinkHelper.Urilize(rawHeadingText, (_options & AutoIdentifierOptions.AllowOnlyAscii) != 0);
+
+        _rendererCache.Release(stripRenderer);
+
+        // If the heading is empty, use the word "section" instead
+        var baseHeadingId = string.IsNullOrEmpty(headingText) ? "section" : headingText;
+
+        // Add a trailing -1, -2, -3...etc. in case of collision
+        var headingId = baseHeadingId;
+        if (!identifiers.Add(headingId))
+        {
+            var headingBuffer = new ValueStringBuilder(stackalloc char[ValueStringBuilder.StackallocThreshold]);
+            headingBuffer.Append(baseHeadingId);
+            headingBuffer.Append('-');
+            uint index = 0;
+            do
             {
-                instance.Reset();
+                index++;
+                headingBuffer.Append(index);
+                headingId = headingBuffer.AsSpan().ToString();
+                headingBuffer.Length = baseHeadingId.Length + 1;
             }
+            while (!identifiers.Add(headingId));
+            headingBuffer.Dispose();
+        }
+
+        attributes.Id = headingId;
+    }
+
+    private sealed class StripRendererCache : ObjectCache<HtmlRenderer>
+    {
+        protected override HtmlRenderer NewInstance()
+        {
+            var headingWriter = new FastStringWriter();
+            var stripRenderer = new HtmlRenderer(headingWriter)
+            {
+                // Set to false both to avoid having any HTML tags in the output
+                EnableHtmlForInline = false,
+                EnableHtmlEscape = false
+            };
+            return stripRenderer;
+        }
+
+        protected override void Reset(HtmlRenderer instance)
+        {
+            instance.ResetInternal();
+
+            ((FastStringWriter)instance.Writer).Reset();
         }
     }
 }

src/Markdig/Extensions/AutoIdentifiers/AutoIdentifierOptions.cs

@@ -2,39 +2,36 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using System;
+namespace Markdig.Extensions.AutoIdentifiers;
 
-namespace Markdig.Extensions.AutoIdentifiers
+/// <summary>
+/// Options for the <see cref="AutoIdentifierExtension"/>.
+/// </summary>
+[Flags]
+public enum AutoIdentifierOptions
 {
     /// <summary>
-    /// Options for the <see cref="AutoIdentifierExtension"/>.
+    /// No options: does not apply any additional formatting and/or transformations.  
     /// </summary>
-    [Flags]
-    public enum AutoIdentifierOptions
-    {
-        /// <summary>
-        /// No options: does not apply any additional formatting and/or transformations.  
-        /// </summary>
-        None = 0,
+    None = 0,
 
-        /// <summary>
-        /// Default (<see cref="AutoLink"/>)
-        /// </summary>
-        Default = AutoLink | AllowOnlyAscii,
+    /// <summary>
+    /// Default (<see cref="AutoLink"/>)
+    /// </summary>
+    Default = AutoLink | AllowOnlyAscii,
 
-        /// <summary>
-        /// Allows to link to a header by using the same text as the header for the link label. Default is <c>true</c>
-        /// </summary>
-        AutoLink = 1,
+    /// <summary>
+    /// Allows to link to a header by using the same text as the header for the link label. Default is <c>true</c>
+    /// </summary>
+    AutoLink = 1,
 
-        /// <summary>
-        /// Allows only ASCII characters in the url (HTML 5 allows to have UTF8 characters). Default is <c>true</c>
-        /// </summary>
-        AllowOnlyAscii = 2,
+    /// <summary>
+    /// Allows only ASCII characters in the url (HTML 5 allows to have UTF8 characters). Default is <c>true</c>
+    /// </summary>
+    AllowOnlyAscii = 2,
 
-        /// <summary>
-        /// Renders auto identifiers like GitHub.
-        /// </summary>
-        GitHub = 4,
-    }
+    /// <summary>
+    /// Renders auto identifiers like GitHub.
+    /// </summary>
+    GitHub = 4,
 }

src/Markdig/Extensions/AutoIdentifiers/HeadingLinkReferenceDefinition.cs

@@ -4,22 +4,21 @@
 
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.AutoIdentifiers
-{
-    /// <summary>
-    /// A link reference definition to a <see cref="HeadingBlock"/> stored at the <see cref="MarkdownDocument"/> level.
-    /// </summary>
-    /// <seealso cref="LinkReferenceDefinition" />
-    public class HeadingLinkReferenceDefinition : LinkReferenceDefinition
-    {
-        public HeadingLinkReferenceDefinition(HeadingBlock headling)
-        {
-            Heading = headling;
-        }
+namespace Markdig.Extensions.AutoIdentifiers;
 
-        /// <summary>
-        /// Gets or sets the heading related to this link reference definition.
-        /// </summary>
-        public HeadingBlock Heading { get; set; }
+/// <summary>
+/// A link reference definition to a <see cref="HeadingBlock"/> stored at the <see cref="MarkdownDocument"/> level.
+/// </summary>
+/// <seealso cref="LinkReferenceDefinition" />
+public class HeadingLinkReferenceDefinition : LinkReferenceDefinition
+{
+    public HeadingLinkReferenceDefinition(HeadingBlock headling)
+    {
+        Heading = headling;
     }
+
+    /// <summary>
+    /// Gets or sets the heading related to this link reference definition.
+    /// </summary>
+    public HeadingBlock Heading { get; set; }
 }

src/Markdig/Extensions/AutoLinks/AutoLinkExtension.cs

@@ -5,32 +5,26 @@
 using Markdig.Renderers;
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.AutoLinks
+namespace Markdig.Extensions.AutoLinks;
+
+/// <summary>
+/// Extension to automatically create <see cref="LinkInline"/> when a link url http: or mailto: is found.
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class AutoLinkExtension(AutoLinkOptions? options) : IMarkdownExtension
 {
-    /// <summary>
-    /// Extension to automatically create <see cref="LinkInline"/> when a link url http: or mailto: is found.
-    /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class AutoLinkExtension : IMarkdownExtension
+    public readonly AutoLinkOptions Options = options ?? new AutoLinkOptions();
+
+    public void Setup(MarkdownPipelineBuilder pipeline)
     {
-        public readonly AutoLinkOptions Options;
-
-        public AutoLinkExtension(AutoLinkOptions? options)
-        {
-            Options = options ?? new AutoLinkOptions();
-        }
-
-        public void Setup(MarkdownPipelineBuilder pipeline)
-        {
-            if (!pipeline.InlineParsers.Contains<AutoLinkParser>())
-            {
-                // Insert the parser before any other parsers
-                pipeline.InlineParsers.Insert(0, new AutoLinkParser(Options));
-            }
-        }
-
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+        if (!pipeline.InlineParsers.Contains<AutoLinkParser>())
         {
+            // Insert the parser before any other parsers
+            pipeline.InlineParsers.Insert(0, new AutoLinkParser(Options));
         }
     }
+
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+    }
 }

src/Markdig/Extensions/AutoLinks/AutoLinkOptions.cs

@@ -2,25 +2,24 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-namespace Markdig.Extensions.AutoLinks
+namespace Markdig.Extensions.AutoLinks;
+
+public class AutoLinkOptions
 {
-    public class AutoLinkOptions
+    public AutoLinkOptions()
     {
-        public AutoLinkOptions()
-        {
-            ValidPreviousCharacters = "*_~(";
-        }
-
-        public string ValidPreviousCharacters { get; set; }
-
-        /// <summary>
-        /// Should the link open in a new window when clicked (false by default)
-        /// </summary>
-        public bool OpenInNewWindow { get; set; }
-
-        /// <summary>
-        /// Should a www link be prefixed with https:// instead of http:// (false by default)
-        /// </summary>
-        public bool UseHttpsForWWWLinks { get; set; }
+        ValidPreviousCharacters = "*_~(";
     }
+
+    public string ValidPreviousCharacters { get; set; }
+
+    /// <summary>
+    /// Should the link open in a new window when clicked (false by default)
+    /// </summary>
+    public bool OpenInNewWindow { get; set; }
+
+    /// <summary>
+    /// Should a www link be prefixed with https:// instead of http:// (false by default)
+    /// </summary>
+    public bool UseHttpsForWWWLinks { get; set; }
 }

src/Markdig/Extensions/AutoLinks/AutoLinkParser.cs

@@ -2,281 +2,278 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using System;
-using System.Collections.Generic;
 using Markdig.Helpers;
 using Markdig.Parsers;
 using Markdig.Renderers.Html;
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.AutoLinks
+namespace Markdig.Extensions.AutoLinks;
+
+/// <summary>
+/// The inline parser used to for autolinks.
+/// </summary>
+/// <seealso cref="InlineParser" />
+public class AutoLinkParser : InlineParser
 {
     /// <summary>
-    /// The inline parser used to for autolinks.
+    /// Initializes a new instance of the <see cref="AutoLinkParser"/> class.
     /// </summary>
-    /// <seealso cref="InlineParser" />
-    public class AutoLinkParser : InlineParser
+    public AutoLinkParser(AutoLinkOptions options)
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="AutoLinkParser"/> class.
-        /// </summary>
-        public AutoLinkParser(AutoLinkOptions options)
+        Options = options ?? throw new ArgumentNullException(nameof(options));
+
+        OpeningCharacters =
+        [
+            'h', // for http:// and https://
+            'f', // for ftp://
+            'm', // for mailto:
+            't', // for tel:
+            'w', // for www.
+        ];
+
+        _listOfCharCache = new ListOfCharCache();
+    }
+
+    public readonly AutoLinkOptions Options;
+
+    private readonly ListOfCharCache _listOfCharCache;
+
+    public override bool Match(InlineProcessor processor, ref StringSlice slice)
+    {
+        // Previous char must be a whitespace or a punctuation
+        var previousChar = slice.PeekCharExtra(-1);
+        if (!previousChar.IsWhiteSpaceOrZero() && Options.ValidPreviousCharacters.IndexOf(previousChar) == -1)
         {
-            Options = options ?? throw new ArgumentNullException(nameof(options));
-
-            OpeningCharacters = new char[]
-            {
-                'h', // for http:// and https://
-                'f', // for ftp://
-                'm', // for mailto:
-                't', // for tel:
-                'w', // for www.
-            };
-
-            _listOfCharCache = new ListOfCharCache();
+            return false;
         }
 
-        public readonly AutoLinkOptions Options;
+        var startPosition = slice.Start;
+        int domainOffset = 0;
 
-        private readonly ListOfCharCache _listOfCharCache;
-
-        public override bool Match(InlineProcessor processor, ref StringSlice slice)
+        var c = slice.CurrentChar;
+        // Precheck URL
+        switch (c)
         {
-            // Previous char must be a whitespace or a punctuation
-            var previousChar = slice.PeekCharExtra(-1);
-            if (!previousChar.IsWhiteSpaceOrZero() && Options.ValidPreviousCharacters.IndexOf(previousChar) == -1)
+            case 'h':
+                if (slice.MatchLowercase("ttp://", 1))
+                {
+                    domainOffset = 7; // http://
+                }
+                else if (slice.MatchLowercase("ttps://", 1))
+                {
+                    domainOffset = 8; // https://
+                }
+                else return false;
+                break;
+            case 'f':
+                if (!slice.MatchLowercase("tp://", 1))
+                {
+                    return false;
+                }
+                domainOffset = 6; // ftp://
+                break;
+            case 'm':
+                if (!slice.MatchLowercase("ailto:", 1))
+                {
+                    return false;
+                }
+                break;
+            case 't':
+                if (!slice.MatchLowercase("el:", 1))
+                {
+                    return false;
+                }
+                domainOffset = 4;
+                break;
+            case 'w':
+                if (!slice.MatchLowercase("ww.", 1)) // We won't match http:/www. or /www.xxx
+                {
+                    return false;
+                }
+                domainOffset = 4; // www.
+                break;
+        }
+
+        List<char> pendingEmphasis = _listOfCharCache.Get();
+        try
+        {
+            // Check that an autolink is possible in the current context
+            if (!IsAutoLinkValidInCurrentContext(processor, pendingEmphasis))
             {
                 return false;
             }
 
-            var startPosition = slice.Start;
-            int domainOffset = 0;
+            // Parse URL
+            if (!LinkHelper.TryParseUrl(ref slice, out string? link, out _, true))
+            {
+                return false;
+            }
 
-            var c = slice.CurrentChar;
-            // Precheck URL
+
+            // If we have any pending emphasis, remove any pending emphasis characters from the end of the link
+            if (pendingEmphasis.Count > 0)
+            {
+                for (int i = link.Length - 1; i >= 0; i--)
+                {
+                    if (pendingEmphasis.Contains(link[i]))
+                    {
+                        slice.Start--;
+                    }
+                    else
+                    {
+                        if (i < link.Length - 1)
+                        {
+                            link = link.Substring(0, i + 1);
+                        }
+                        break;
+                    }
+                }
+            }
+
+            // Post-check URL
             switch (c)
             {
                 case 'h':
-                    if (slice.MatchLowercase("ttp://", 1))
-                    {
-                        domainOffset = 7; // http://
-                    }
-                    else if (slice.MatchLowercase("ttps://", 1))
-                    {
-                        domainOffset = 8; // https://
-                    }
-                    else return false;
-                    break;
-                case 'f':
-                    if (!slice.MatchLowercase("tp://", 1))
+                    if (string.Equals(link, "http://", StringComparison.OrdinalIgnoreCase) ||
+                        string.Equals(link, "https://", StringComparison.OrdinalIgnoreCase))
                     {
                         return false;
                     }
-                    domainOffset = 6; // ftp://
                     break;
-                case 'm':
-                    if (!slice.MatchLowercase("ailto:", 1))
+                case 'f':
+                    if (string.Equals(link, "ftp://", StringComparison.OrdinalIgnoreCase))
                     {
                         return false;
                     }
                     break;
                 case 't':
-                    if (!slice.MatchLowercase("el:", 1))
+                    if (string.Equals(link, "tel", StringComparison.OrdinalIgnoreCase))
                     {
                         return false;
                     }
-                    domainOffset = 4;
                     break;
-                case 'w':
-                    if (!slice.MatchLowercase("ww.", 1)) // We won't match http:/www. or /www.xxx
+                case 'm':
+                    int atIndex = link.IndexOf('@');
+                    if (atIndex == -1 ||
+                        atIndex == 7) // mailto:@ - no email part
                     {
                         return false;
                     }
-                    domainOffset = 4; // www.
+                    domainOffset = atIndex + 1;
                     break;
             }
 
-            List<char> pendingEmphasis = _listOfCharCache.Get();
-            try
+            // Do not need to check if a telephone number is a valid domain
+            if (c != 't' && !LinkHelper.IsValidDomain(link, domainOffset))
             {
-                // Check that an autolink is possible in the current context
-                if (!IsAutoLinkValidInCurrentContext(processor, pendingEmphasis))
-                {
-                    return false;
-                }
-
-                // Parse URL
-                if (!LinkHelper.TryParseUrl(ref slice, out string? link, out _, true))
-                {
-                    return false;
-                }
-
-
-                // If we have any pending emphasis, remove any pending emphasis characters from the end of the link
-                if (pendingEmphasis.Count > 0)
-                {
-                    for (int i = link.Length - 1; i >= 0; i--)
-                    {
-                        if (pendingEmphasis.Contains(link[i]))
-                        {
-                            slice.Start--;
-                        }
-                        else
-                        {
-                            if (i < link.Length - 1)
-                            {
-                                link = link.Substring(0, i + 1);
-                            }
-                            break;
-                        }
-                    }
-                }
-
-                // Post-check URL
-                switch (c)
-                {
-                    case 'h':
-                        if (string.Equals(link, "http://", StringComparison.OrdinalIgnoreCase) ||
-                            string.Equals(link, "https://", StringComparison.OrdinalIgnoreCase))
-                        {
-                            return false;
-                        }
-                        break;
-                    case 'f':
-                        if (string.Equals(link, "ftp://", StringComparison.OrdinalIgnoreCase))
-                        {
-                            return false;
-                        }
-                        break;
-                    case 't':
-                        if (string.Equals(link, "tel", StringComparison.OrdinalIgnoreCase))
-                        {
-                            return false;
-                        }
-                        break;
-                    case 'm':
-                        int atIndex = link.IndexOf('@');
-                        if (atIndex == -1 ||
-                            atIndex == 7) // mailto:@ - no email part
-                        {
-                            return false;
-                        }
-                        domainOffset = atIndex + 1;
-                        break;
-                }
-
-                // Do not need to check if a telephone number is a valid domain
-                if (c != 't' && !LinkHelper.IsValidDomain(link, domainOffset))
-                {
-                    return false;
-                }
-
-                var inline = new LinkInline()
-                {
-                    Span =
-                    {
-                        Start = processor.GetSourcePosition(startPosition, out int line, out int column),
-                    },
-                    Line = line,
-                    Column = column,
-                    Url = c == 'w' ? ((Options.UseHttpsForWWWLinks ? "https://" : "http://") + link) : link,
-                    IsClosed = true,
-                    IsAutoLink = true,
-                };
-
-                var skipFromBeginning = c == 'm' ? 7 : 0; // For mailto: skip "mailto:" for content
-                skipFromBeginning = c == 't' ? 4 : skipFromBeginning; // See above but for tel:
-
-                inline.Span.End = inline.Span.Start + link.Length - 1;
-                inline.UrlSpan = inline.Span;
-                inline.AppendChild(new LiteralInline()
-                {
-                    Span = inline.Span,
-                    Line = line,
-                    Column = column,
-                    Content = new StringSlice(slice.Text, startPosition + skipFromBeginning, startPosition + link.Length - 1),
-                    IsClosed = true
-                });
-                processor.Inline = inline;
-
-                if (Options.OpenInNewWindow)
-                {
-                    inline.GetAttributes().AddPropertyIfNotExist("target", "_blank");
-                }
-
-                return true;
+                return false;
             }
-            finally
+
+            var inline = new LinkInline()
             {
-                _listOfCharCache.Release(pendingEmphasis);
+                Span =
+                {
+                    Start = processor.GetSourcePosition(startPosition, out int line, out int column),
+                },
+                Line = line,
+                Column = column,
+                Url = c == 'w' ? ((Options.UseHttpsForWWWLinks ? "https://" : "http://") + link) : link,
+                IsClosed = true,
+                IsAutoLink = true,
+            };
+
+            var skipFromBeginning = c == 'm' ? 7 : 0; // For mailto: skip "mailto:" for content
+            skipFromBeginning = c == 't' ? 4 : skipFromBeginning; // See above but for tel:
+
+            inline.Span.End = inline.Span.Start + link.Length - 1;
+            inline.UrlSpan = inline.Span;
+            inline.AppendChild(new LiteralInline()
+            {
+                Span = inline.Span,
+                Line = line,
+                Column = column,
+                Content = new StringSlice(slice.Text, startPosition + skipFromBeginning, startPosition + link.Length - 1),
+                IsClosed = true
+            });
+            processor.Inline = inline;
+
+            if (Options.OpenInNewWindow)
+            {
+                inline.GetAttributes().AddPropertyIfNotExist("target", "_blank");
             }
+
+            return true;
+        }
+        finally
+        {
+            _listOfCharCache.Release(pendingEmphasis);
+        }
+    }
+
+    private bool IsAutoLinkValidInCurrentContext(InlineProcessor processor, List<char> pendingEmphasis)
+    {
+        // Case where there is a pending HtmlInline <a>
+        var currentInline = processor.Inline;
+        while (currentInline != null)
+        {
+            if (currentInline is HtmlInline htmlInline)
+            {
+                // If we have a </a> we don't expect nested <a>
+                if (htmlInline.Tag.StartsWith("</a", StringComparison.OrdinalIgnoreCase))
+                {
+                    break;
+                }
+
+                // If there is a pending <a>, we can't allow a link
+                if (htmlInline.Tag.StartsWith("<a", StringComparison.OrdinalIgnoreCase))
+                {
+                    return false;
+                }
+            }
+
+            // Check previous sibling and parents in the tree
+            currentInline = currentInline.PreviousSibling ?? currentInline.Parent;
         }
 
-        private bool IsAutoLinkValidInCurrentContext(InlineProcessor processor, List<char> pendingEmphasis)
+        // Check that we don't have any pending brackets opened (where we could have a possible markdown link)
+        // NOTE: This assume that [ and ] are used for links, otherwise autolink will not work properly
+        currentInline = processor.Inline;
+        int countBrackets = 0;
+        while (currentInline != null)
         {
-            // Case where there is a pending HtmlInline <a>
-            var currentInline = processor.Inline;
-            while (currentInline != null)
+            if (currentInline is LinkDelimiterInline linkDelimiterInline && linkDelimiterInline.IsActive)
             {
-                if (currentInline is HtmlInline htmlInline)
+                if (linkDelimiterInline.Type == DelimiterType.Open)
                 {
-                    // If we have a </a> we don't expect nested <a>
-                    if (htmlInline.Tag.StartsWith("</a", StringComparison.OrdinalIgnoreCase))
-                    {
-                        break;
-                    }
-
-                    // If there is a pending <a>, we can't allow a link
-                    if (htmlInline.Tag.StartsWith("<a", StringComparison.OrdinalIgnoreCase))
-                    {
-                        return false;
-                    }
+                    countBrackets++;
+                }
+                else if (linkDelimiterInline.Type == DelimiterType.Close)
+                {
+                    countBrackets--;
                 }
-
-                // Check previous sibling and parents in the tree
-                currentInline = currentInline.PreviousSibling ?? currentInline.Parent;
             }
-
-            // Check that we don't have any pending brackets opened (where we could have a possible markdown link)
-            // NOTE: This assume that [ and ] are used for links, otherwise autolink will not work properly
-            currentInline = processor.Inline;
-            int countBrackets = 0;
-            while (currentInline != null)
+            else
             {
-                if (currentInline is LinkDelimiterInline linkDelimiterInline && linkDelimiterInline.IsActive)
+                // Record all pending characters for emphasis
+                if (currentInline is EmphasisDelimiterInline emphasisDelimiter)
                 {
-                    if (linkDelimiterInline.Type == DelimiterType.Open)
+                    if (!pendingEmphasis.Contains(emphasisDelimiter.DelimiterChar))
                     {
-                        countBrackets++;
-                    }
-                    else if (linkDelimiterInline.Type == DelimiterType.Close)
-                    {
-                        countBrackets--;
+                        pendingEmphasis.Add(emphasisDelimiter.DelimiterChar);
                     }
                 }
-                else
-                {
-                    // Record all pending characters for emphasis
-                    if (currentInline is EmphasisDelimiterInline emphasisDelimiter)
-                    {
-                        if (!pendingEmphasis.Contains(emphasisDelimiter.DelimiterChar))
-                        {
-                            pendingEmphasis.Add(emphasisDelimiter.DelimiterChar);
-                        }
-                    }
-                }
-                currentInline = currentInline.Parent;
             }
-
-            return countBrackets <= 0;
+            currentInline = currentInline.Parent;
         }
 
-        private sealed class ListOfCharCache : DefaultObjectCache<List<char>>
+        return countBrackets <= 0;
+    }
+
+    private sealed class ListOfCharCache : DefaultObjectCache<List<char>>
+    {
+        protected override void Reset(List<char> instance)
         {
-            protected override void Reset(List<char> instance)
-            {
-                instance.Clear();
-            }
+            instance.Clear();
         }
     }
 }

src/Markdig/Extensions/Bootstrap/BootstrapExtension.cs

@@ -7,57 +7,56 @@ using Markdig.Renderers.Html;
 using Markdig.Syntax;
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.Bootstrap
+namespace Markdig.Extensions.Bootstrap;
+
+/// <summary>
+/// Extension for tagging some HTML elements with bootstrap classes.
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class BootstrapExtension : IMarkdownExtension
 {
-    /// <summary>
-    /// Extension for tagging some HTML elements with bootstrap classes.
-    /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class BootstrapExtension : IMarkdownExtension
+    public void Setup(MarkdownPipelineBuilder pipeline)
     {
-        public void Setup(MarkdownPipelineBuilder pipeline)
-        {
-            // Make sure we don't have a delegate twice
-            pipeline.DocumentProcessed -= PipelineOnDocumentProcessed;
-            pipeline.DocumentProcessed += PipelineOnDocumentProcessed;
-        }
+        // Make sure we don't have a delegate twice
+        pipeline.DocumentProcessed -= PipelineOnDocumentProcessed;
+        pipeline.DocumentProcessed += PipelineOnDocumentProcessed;
+    }
 
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
-        {
-        }
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+    }
 
-        private static void PipelineOnDocumentProcessed(MarkdownDocument document)
+    private static void PipelineOnDocumentProcessed(MarkdownDocument document)
+    {
+        foreach (var node in document.Descendants())
         {
-            foreach (var node in document.Descendants())
+            if (node.IsInline)
             {
-                if (node.IsInline)
+                if (node.IsContainerInline && node is LinkInline link && link.IsImage)
                 {
-                    if (node.IsContainerInline && node is LinkInline link && link.IsImage)
-                    {
-                        link.GetAttributes().AddClass("img-fluid");
-                    }
+                    link.GetAttributes().AddClass("img-fluid");
                 }
-                else if (node.IsContainerBlock)
+            }
+            else if (node.IsContainerBlock)
+            {
+                if (node is Tables.Table)
                 {
-                    if (node is Tables.Table)
-                    {
-                        node.GetAttributes().AddClass("table");
-                    }
-                    else if (node is QuoteBlock)
-                    {
-                        node.GetAttributes().AddClass("blockquote");
-                    }
-                    else if (node is Figures.Figure)
-                    {
-                        node.GetAttributes().AddClass("figure");
-                    }
+                    node.GetAttributes().AddClass("table");
                 }
-                else
+                else if (node is QuoteBlock)
                 {
-                    if (node is Figures.FigureCaption)
-                    {
-                        node.GetAttributes().AddClass("figure-caption");
-                    }
+                    node.GetAttributes().AddClass("blockquote");
+                }
+                else if (node is Figures.Figure)
+                {
+                    node.GetAttributes().AddClass("figure");
+                }
+            }
+            else
+            {
+                if (node is Figures.FigureCaption)
+                {
+                    node.GetAttributes().AddClass("figure-caption");
                 }
             }
         }

src/Markdig/Extensions/Citations/CitationExtension.cs

@@ -8,42 +8,41 @@ using Markdig.Renderers;
 using Markdig.Renderers.Html.Inlines;
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.Citations
+namespace Markdig.Extensions.Citations;
+
+/// <summary>
+/// Extension for cite ""...""
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class CitationExtension : IMarkdownExtension
 {
-    /// <summary>
-    /// Extension for cite ""...""
-    /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class CitationExtension : IMarkdownExtension
+    public void Setup(MarkdownPipelineBuilder pipeline)
     {
-        public void Setup(MarkdownPipelineBuilder pipeline)
+        var parser = pipeline.InlineParsers.FindExact<EmphasisInlineParser>();
+        if (parser != null && !parser.HasEmphasisChar('"'))
         {
-            var parser = pipeline.InlineParsers.FindExact<EmphasisInlineParser>();
-            if (parser != null && !parser.HasEmphasisChar('"'))
-            {
-                parser.EmphasisDescriptors.Add(new EmphasisDescriptor('"', 2, 2, false));
-            }
-        }
-
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
-        {
-            if (renderer is HtmlRenderer htmlRenderer)
-            {
-                // Extend the rendering here.
-                var emphasisRenderer = renderer.ObjectRenderers.FindExact<EmphasisInlineRenderer>();
-                if (emphasisRenderer != null)
-                {
-                    // TODO: Use an ordered list instead as we don't know if this specific GetTag has been already added
-                    var previousTag = emphasisRenderer.GetTag;
-                    emphasisRenderer.GetTag = inline => GetTag(inline) ?? previousTag(inline);
-                }
-            }
-        }
-
-        private static string? GetTag(EmphasisInline emphasisInline)
-        {
-            Debug.Assert(emphasisInline.DelimiterCount <= 2);
-            return emphasisInline.DelimiterCount == 2 && emphasisInline.DelimiterChar == '"' ? "cite" : null;
+            parser.EmphasisDescriptors.Add(new EmphasisDescriptor('"', 2, 2, false));
         }
     }
+
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+        if (renderer is HtmlRenderer htmlRenderer)
+        {
+            // Extend the rendering here.
+            var emphasisRenderer = renderer.ObjectRenderers.FindExact<EmphasisInlineRenderer>();
+            if (emphasisRenderer != null)
+            {
+                // TODO: Use an ordered list instead as we don't know if this specific GetTag has been already added
+                var previousTag = emphasisRenderer.GetTag;
+                emphasisRenderer.GetTag = inline => GetTag(inline) ?? previousTag(inline);
+            }
+        }
+    }
+
+    private static string? GetTag(EmphasisInline emphasisInline)
+    {
+        Debug.Assert(emphasisInline.DelimiterCount <= 2);
+        return emphasisInline.DelimiterCount == 2 && emphasisInline.DelimiterChar == '"' ? "cite" : null;
+    }
 }

src/Markdig/Extensions/CustomContainers/CustomContainer.cs

@@ -6,57 +6,56 @@ using Markdig.Helpers;
 using Markdig.Parsers;
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.CustomContainers
+namespace Markdig.Extensions.CustomContainers;
+
+/// <summary>
+/// A block custom container.
+/// </summary>
+/// <seealso cref="ContainerBlock" />
+/// <seealso cref="IFencedBlock" />
+public class CustomContainer : ContainerBlock, IFencedBlock
 {
     /// <summary>
-    /// A block custom container.
+    /// Initializes a new instance of the <see cref="CustomContainer"/> class.
     /// </summary>
-    /// <seealso cref="ContainerBlock" />
-    /// <seealso cref="IFencedBlock" />
-    public class CustomContainer : ContainerBlock, IFencedBlock
+    /// <param name="parser">The parser used to create this block.</param>
+    public CustomContainer(BlockParser parser) : base(parser)
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="CustomContainer"/> class.
-        /// </summary>
-        /// <param name="parser">The parser used to create this block.</param>
-        public CustomContainer(BlockParser parser) : base(parser)
-        {
-        }
-
-        /// <inheritdoc />
-        public char FencedChar { get; set; }
-
-        /// <inheritdoc />
-        public int OpeningFencedCharCount { get; set; }
-
-        /// <inheritdoc />
-        public StringSlice TriviaAfterFencedChar { get; set; }
-
-        /// <inheritdoc />
-        public string? Info { get; set; }
-
-        /// <inheritdoc />
-        public StringSlice UnescapedInfo { get; set; }
-
-        /// <inheritdoc />
-        public StringSlice TriviaAfterInfo { get; set; }
-
-        /// <inheritdoc />
-        public string? Arguments { get; set; }
-
-        /// <inheritdoc />
-        public StringSlice UnescapedArguments { get; set; }
-
-        /// <inheritdoc />
-        public StringSlice TriviaAfterArguments { get; set; }
-
-        /// <inheritdoc />
-        public NewLine InfoNewLine { get; set; }
-
-        /// <inheritdoc />
-        public StringSlice TriviaBeforeClosingFence { get; set; }
-
-        /// <inheritdoc />
-        public int ClosingFencedCharCount { get; set; }
     }
+
+    /// <inheritdoc />
+    public char FencedChar { get; set; }
+
+    /// <inheritdoc />
+    public int OpeningFencedCharCount { get; set; }
+
+    /// <inheritdoc />
+    public StringSlice TriviaAfterFencedChar { get; set; }
+
+    /// <inheritdoc />
+    public string? Info { get; set; }
+
+    /// <inheritdoc />
+    public StringSlice UnescapedInfo { get; set; }
+
+    /// <inheritdoc />
+    public StringSlice TriviaAfterInfo { get; set; }
+
+    /// <inheritdoc />
+    public string? Arguments { get; set; }
+
+    /// <inheritdoc />
+    public StringSlice UnescapedArguments { get; set; }
+
+    /// <inheritdoc />
+    public StringSlice TriviaAfterArguments { get; set; }
+
+    /// <inheritdoc />
+    public NewLine InfoNewLine { get; set; }
+
+    /// <inheritdoc />
+    public StringSlice TriviaBeforeClosingFence { get; set; }
+
+    /// <inheritdoc />
+    public int ClosingFencedCharCount { get; set; }
 }

src/Markdig/Extensions/CustomContainers/CustomContainerExtension.cs

@@ -5,54 +5,53 @@
 using Markdig.Parsers.Inlines;
 using Markdig.Renderers;
 
-namespace Markdig.Extensions.CustomContainers
-{
-    /// <summary>
-    /// Extension to allow custom containers.
-    /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class CustomContainerExtension : IMarkdownExtension
-    {
-        public void Setup(MarkdownPipelineBuilder pipeline)
-        {
-            if (!pipeline.BlockParsers.Contains<CustomContainerParser>())
-            {
-                // Insert the parser before any other parsers
-                pipeline.BlockParsers.Insert(0, new CustomContainerParser());
-            }
+namespace Markdig.Extensions.CustomContainers;
 
-            // Plug the inline parser for CustomContainerInline
-            var inlineParser = pipeline.InlineParsers.Find<EmphasisInlineParser>();
-            if (inlineParser != null && !inlineParser.HasEmphasisChar(':'))
-            {
-                inlineParser.EmphasisDescriptors.Add(new EmphasisDescriptor(':', 2, 2, true));
-                inlineParser.TryCreateEmphasisInlineList.Add((emphasisChar, delimiterCount) =>
-                {
-                    if (delimiterCount == 2 && emphasisChar == ':')
-                    {
-                        return new CustomContainerInline();
-                    }
-                    return null;
-                });
-            }
+/// <summary>
+/// Extension to allow custom containers.
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class CustomContainerExtension : IMarkdownExtension
+{
+    public void Setup(MarkdownPipelineBuilder pipeline)
+    {
+        if (!pipeline.BlockParsers.Contains<CustomContainerParser>())
+        {
+            // Insert the parser before any other parsers
+            pipeline.BlockParsers.Insert(0, new CustomContainerParser());
         }
 
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+        // Plug the inline parser for CustomContainerInline
+        var inlineParser = pipeline.InlineParsers.Find<EmphasisInlineParser>();
+        if (inlineParser != null && !inlineParser.HasEmphasisChar(':'))
         {
-            if (renderer is HtmlRenderer htmlRenderer)
+            inlineParser.EmphasisDescriptors.Add(new EmphasisDescriptor(':', 2, 2, true));
+            inlineParser.TryCreateEmphasisInlineList.Add((emphasisChar, delimiterCount) =>
             {
-                if (!htmlRenderer.ObjectRenderers.Contains<HtmlCustomContainerRenderer>())
+                if (delimiterCount == 2 && emphasisChar == ':')
                 {
-                    // Must be inserted before CodeBlockRenderer
-                    htmlRenderer.ObjectRenderers.Insert(0, new HtmlCustomContainerRenderer());
+                    return new CustomContainerInline();
                 }
-                if (!htmlRenderer.ObjectRenderers.Contains<HtmlCustomContainerInlineRenderer>())
-                {
-                    // Must be inserted before EmphasisRenderer
-                    htmlRenderer.ObjectRenderers.Insert(0, new HtmlCustomContainerInlineRenderer());
-                }
-            }
-
+                return null;
+            });
         }
     }
+
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+        if (renderer is HtmlRenderer htmlRenderer)
+        {
+            if (!htmlRenderer.ObjectRenderers.Contains<HtmlCustomContainerRenderer>())
+            {
+                // Must be inserted before CodeBlockRenderer
+                htmlRenderer.ObjectRenderers.Insert(0, new HtmlCustomContainerRenderer());
+            }
+            if (!htmlRenderer.ObjectRenderers.Contains<HtmlCustomContainerInlineRenderer>())
+            {
+                // Must be inserted before EmphasisRenderer
+                htmlRenderer.ObjectRenderers.Insert(0, new HtmlCustomContainerInlineRenderer());
+            }
+        }
+
+    }
 }

src/Markdig/Extensions/CustomContainers/CustomContainerInline.cs

@@ -4,14 +4,13 @@
 
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.CustomContainers
+namespace Markdig.Extensions.CustomContainers;
+
+/// <summary>
+/// An inline custom container
+/// </summary>
+/// <seealso cref="ContainerInline" />
+/// <seealso cref="EmphasisInline" />
+public class CustomContainerInline : EmphasisInline
 {
-    /// <summary>
-    /// An inline custom container
-    /// </summary>
-    /// <seealso cref="ContainerInline" />
-    /// <seealso cref="EmphasisInline" />
-    public class CustomContainerInline : EmphasisInline
-    {
-    }
 }

src/Markdig/Extensions/CustomContainers/CustomContainerParser.cs

@@ -4,28 +4,27 @@
 
 using Markdig.Parsers;
 
-namespace Markdig.Extensions.CustomContainers
+namespace Markdig.Extensions.CustomContainers;
+
+/// <summary>
+/// The block parser for a <see cref="CustomContainer"/>.
+/// </summary>
+/// <seealso cref="FencedBlockParserBase{CustomContainer}" />
+public class CustomContainerParser : FencedBlockParserBase<CustomContainer>
 {
     /// <summary>
-    /// The block parser for a <see cref="CustomContainer"/>.
+    /// Initializes a new instance of the <see cref="CustomContainerParser"/> class.
     /// </summary>
-    /// <seealso cref="FencedBlockParserBase{CustomContainer}" />
-    public class CustomContainerParser : FencedBlockParserBase<CustomContainer>
+    public CustomContainerParser()
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="CustomContainerParser"/> class.
-        /// </summary>
-        public CustomContainerParser()
-        {
-            OpeningCharacters = new [] {':'};
+        OpeningCharacters = [':'];
 
-            // We don't need a prefix
-            InfoPrefix = null;
-        }
+        // We don't need a prefix
+        InfoPrefix = null;
+    }
 
-        protected override CustomContainer CreateFencedBlock(BlockProcessor processor)
-        {
-            return new CustomContainer(this);
-        }
+    protected override CustomContainer CreateFencedBlock(BlockProcessor processor)
+    {
+        return new CustomContainer(this);
     }
 }

src/Markdig/Extensions/CustomContainers/HtmlCustomContainerInlineRenderer.cs

@@ -5,19 +5,18 @@
 using Markdig.Renderers;
 using Markdig.Renderers.Html;
 
-namespace Markdig.Extensions.CustomContainers
+namespace Markdig.Extensions.CustomContainers;
+
+/// <summary>
+/// A HTML renderer for a <see cref="CustomContainerInline"/>.
+/// </summary>
+/// <seealso cref="HtmlObjectRenderer{CustomContainerInline}" />
+public class HtmlCustomContainerInlineRenderer : HtmlObjectRenderer<CustomContainerInline>
 {
-    /// <summary>
-    /// A HTML renderer for a <see cref="CustomContainerInline"/>.
-    /// </summary>
-    /// <seealso cref="HtmlObjectRenderer{CustomContainerInline}" />
-    public class HtmlCustomContainerInlineRenderer : HtmlObjectRenderer<CustomContainerInline>
+    protected override void Write(HtmlRenderer renderer, CustomContainerInline obj)
     {
-        protected override void Write(HtmlRenderer renderer, CustomContainerInline obj)
-        {
-            renderer.Write("<span").WriteAttributes(obj).Write('>');
-            renderer.WriteChildren(obj);
-            renderer.Write("</span>");
-        }
+        renderer.Write("<span").WriteAttributes(obj).Write('>');
+        renderer.WriteChildren(obj);
+        renderer.Write("</span>");
     }
 }

src/Markdig/Extensions/CustomContainers/HtmlCustomContainerRenderer.cs

@@ -5,27 +5,26 @@
 using Markdig.Renderers;
 using Markdig.Renderers.Html;
 
-namespace Markdig.Extensions.CustomContainers
+namespace Markdig.Extensions.CustomContainers;
+
+/// <summary>
+/// A HTML renderer for a <see cref="CustomContainer"/>.
+/// </summary>
+/// <seealso cref="HtmlObjectRenderer{CustomContainer}" />
+public class HtmlCustomContainerRenderer : HtmlObjectRenderer<CustomContainer>
 {
-    /// <summary>
-    /// A HTML renderer for a <see cref="CustomContainer"/>.
-    /// </summary>
-    /// <seealso cref="HtmlObjectRenderer{CustomContainer}" />
-    public class HtmlCustomContainerRenderer : HtmlObjectRenderer<CustomContainer>
+    protected override void Write(HtmlRenderer renderer, CustomContainer obj)
     {
-        protected override void Write(HtmlRenderer renderer, CustomContainer obj)
+        renderer.EnsureLine();
+        if (renderer.EnableHtmlForBlock)
         {
-            renderer.EnsureLine();
-            if (renderer.EnableHtmlForBlock)
-            {
-                renderer.Write("<div").WriteAttributes(obj).Write('>');
-            }
-            // We don't escape a CustomContainer
-            renderer.WriteChildren(obj);
-            if (renderer.EnableHtmlForBlock)
-            {
-                renderer.WriteLine("</div>");
-            }
+            renderer.Write("<div").WriteAttributes(obj).Write('>');
+        }
+        // We don't escape a CustomContainer
+        renderer.WriteChildren(obj);
+        if (renderer.EnableHtmlForBlock)
+        {
+            renderer.WriteLine("</div>");
         }
     }
 }

src/Markdig/Extensions/DefinitionLists/DefinitionItem.cs

@@ -5,26 +5,25 @@
 using Markdig.Parsers;
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.DefinitionLists
+namespace Markdig.Extensions.DefinitionLists;
+
+/// <summary>
+/// A definition item contains zero to multiple <see cref="DefinitionTerm"/> 
+/// and definitions (any <see cref="Block"/>)
+/// </summary>
+/// <seealso cref="ContainerBlock" />
+public class DefinitionItem : ContainerBlock
 {
     /// <summary>
-    /// A definition item contains zero to multiple <see cref="DefinitionTerm"/> 
-    /// and definitions (any <see cref="Block"/>)
+    /// Initializes a new instance of the <see cref="DefinitionItem"/> class.
     /// </summary>
-    /// <seealso cref="ContainerBlock" />
-    public class DefinitionItem : ContainerBlock
+    /// <param name="parser">The parser used to create this block.</param>
+    public DefinitionItem(BlockParser parser) : base(parser)
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="DefinitionItem"/> class.
-        /// </summary>
-        /// <param name="parser">The parser used to create this block.</param>
-        public DefinitionItem(BlockParser parser) : base(parser)
-        {
-        }
-
-        /// <summary>
-        /// Gets or sets the opening character for this definition item (either `:` or `~`)
-        /// </summary>
-        public char OpeningCharacter { get; set; }
     }
+
+    /// <summary>
+    /// Gets or sets the opening character for this definition item (either `:` or `~`)
+    /// </summary>
+    public char OpeningCharacter { get; set; }
 }

src/Markdig/Extensions/DefinitionLists/DefinitionList.cs

@@ -5,20 +5,19 @@
 using Markdig.Parsers;
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.DefinitionLists
+namespace Markdig.Extensions.DefinitionLists;
+
+/// <summary>
+/// A definition list contains <see cref="DefinitionItem"/> children.
+/// </summary>
+/// <seealso cref="ContainerBlock" />
+public class DefinitionList : ContainerBlock
 {
     /// <summary>
-    /// A definition list contains <see cref="DefinitionItem"/> children.
+    /// Initializes a new instance of the <see cref="DefinitionList"/> class.
     /// </summary>
-    /// <seealso cref="ContainerBlock" />
-    public class DefinitionList : ContainerBlock
+    /// <param name="parser">The parser used to create this block.</param>
+    public DefinitionList(BlockParser parser) : base(parser)
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="DefinitionList"/> class.
-        /// </summary>
-        /// <param name="parser">The parser used to create this block.</param>
-        public DefinitionList(BlockParser parser) : base(parser)
-        {
-        }
     }
 }

src/Markdig/Extensions/DefinitionLists/DefinitionListExtension.cs

@@ -4,31 +4,30 @@
 
 using Markdig.Renderers;
 
-namespace Markdig.Extensions.DefinitionLists
-{
-    /// <summary>
-    /// Extension to allow definition lists
-    /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class DefinitionListExtension : IMarkdownExtension
-    {
-        public void Setup(MarkdownPipelineBuilder pipeline)
-        {
-            if (!pipeline.BlockParsers.Contains<DefinitionListParser>())
-            {
-                // Insert the parser before any other parsers
-                pipeline.BlockParsers.Insert(0, new DefinitionListParser());
-            }
-        }
+namespace Markdig.Extensions.DefinitionLists;
 
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+/// <summary>
+/// Extension to allow definition lists
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class DefinitionListExtension : IMarkdownExtension
+{
+    public void Setup(MarkdownPipelineBuilder pipeline)
+    {
+        if (!pipeline.BlockParsers.Contains<DefinitionListParser>())
         {
-            if (renderer is HtmlRenderer htmlRenderer)
+            // Insert the parser before any other parsers
+            pipeline.BlockParsers.Insert(0, new DefinitionListParser());
+        }
+    }
+
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+        if (renderer is HtmlRenderer htmlRenderer)
+        {
+            if (!htmlRenderer.ObjectRenderers.Contains<HtmlDefinitionListRenderer>())
             {
-                if (!htmlRenderer.ObjectRenderers.Contains<HtmlDefinitionListRenderer>())
-                {
-                    htmlRenderer.ObjectRenderers.Insert(0, new HtmlDefinitionListRenderer());
-                }
+                htmlRenderer.ObjectRenderers.Insert(0, new HtmlDefinitionListRenderer());
             }
         }
     }

src/Markdig/Extensions/DefinitionLists/DefinitionListParser.cs

@@ -2,36 +2,134 @@
 // This file is licensed under the BSD-Clause 2 license. 
 // See the license.txt file in the project root for more information.
 
-using System;
 using Markdig.Parsers;
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.DefinitionLists
+namespace Markdig.Extensions.DefinitionLists;
+
+/// <summary>
+/// The block parser for a <see cref="DefinitionList"/>.
+/// </summary>
+/// <seealso cref="BlockParser" />
+public class DefinitionListParser : BlockParser
 {
     /// <summary>
-    /// The block parser for a <see cref="DefinitionList"/>.
+    /// Initializes a new instance of the <see cref="DefinitionListParser"/> class.
     /// </summary>
-    /// <seealso cref="BlockParser" />
-    public class DefinitionListParser : BlockParser
+    public DefinitionListParser()
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="DefinitionListParser"/> class.
-        /// </summary>
-        public DefinitionListParser()
+        OpeningCharacters = [':', '~'];
+    }
+
+    public override BlockState TryOpen(BlockProcessor processor)
+    {
+        var paragraphBlock = processor.LastBlock as ParagraphBlock;
+        if (processor.IsCodeIndent || paragraphBlock is null || paragraphBlock.LastLine - processor.LineIndex > 1)
         {
-            OpeningCharacters = new [] {':', '~'};
+            return BlockState.None;
         }
 
-        public override BlockState TryOpen(BlockProcessor processor)
+        var startPosition = processor.Start;
+
+        var column = processor.ColumnBeforeIndent;
+        processor.NextChar();
+        processor.ParseIndent();
+        var delta = processor.Column - column;
+
+        // We expect to have a least
+        if (delta < 4)
         {
-            var paragraphBlock = processor.LastBlock as ParagraphBlock;
-            if (processor.IsCodeIndent || paragraphBlock is null || paragraphBlock.LastLine - processor.LineIndex > 1)
+            // Return back to original position
+            processor.GoToColumn(column);
+            return BlockState.None;
+        }
+
+        if (delta > 4)
+        {
+            processor.GoToColumn(column + 4);
+        }
+
+        var previousParent = paragraphBlock.Parent!;
+        var currentDefinitionList = GetCurrentDefinitionList(paragraphBlock, previousParent);
+
+        processor.Discard(paragraphBlock);
+
+        // If the paragraph block was not part of the opened blocks, we need to remove it manually from its parent container
+        if (paragraphBlock.Parent != null)
+        {
+            paragraphBlock.Parent.Remove(paragraphBlock);
+        }
+
+        if (currentDefinitionList is null)
+        {
+            currentDefinitionList = new DefinitionList(this)
             {
-                return BlockState.None;
-            }
+                Span = new SourceSpan(paragraphBlock.Span.Start, processor.Line.End),
+                Column = paragraphBlock.Column,
+                Line = paragraphBlock.Line,
+            };
+            previousParent.Add(currentDefinitionList);
+        }
 
+        var definitionItem = new DefinitionItem(this)
+        {
+            Line = processor.LineIndex,
+            Column = column,
+            Span = new SourceSpan(startPosition, processor.Line.End),
+            OpeningCharacter = processor.CurrentChar,
+        };
+
+        for (int i = 0; i < paragraphBlock.Lines.Count; i++)
+        {
+            var line = paragraphBlock.Lines.Lines[i];
+            var term = new DefinitionTerm(this)
+            {
+                Column =  paragraphBlock.Column,
+                Line = line.Line,
+                Span = new SourceSpan(paragraphBlock.Span.Start, paragraphBlock.Span.End),
+                IsOpen = false
+            };
+            term.AppendLine(ref line.Slice, line.Column, line.Line, line.Position, processor.TrackTrivia);
+            definitionItem.Add(term);
+        }
+        currentDefinitionList.Add(definitionItem);
+        processor.Open(definitionItem);
+
+        // Update the end position
+        currentDefinitionList.UpdateSpanEnd(processor.Line.End);
+
+        return BlockState.Continue;
+    }
+
+    private static DefinitionList? GetCurrentDefinitionList(ParagraphBlock paragraphBlock, ContainerBlock previousParent)
+    {
+        var index = previousParent.IndexOf(paragraphBlock) - 1;
+        if (index < 0) return null;
+        var lastBlock = previousParent[index];
+        if (lastBlock is BlankLineBlock)
+        {
+            lastBlock = previousParent[index - 1];
+            previousParent.RemoveAt(index);
+        }
+        return lastBlock as DefinitionList;
+    }
+
+    public override BlockState TryContinue(BlockProcessor processor, Block block)
+    {
+        var definitionItem = (DefinitionItem)block;
+        if (processor.IsCodeIndent)
+        {
+            processor.GoToCodeIndent();
+            return BlockState.Continue;
+        }
+
+        var list = (DefinitionList)definitionItem.Parent!;
+        var lastBlankLine = definitionItem.LastChild as BlankLineBlock;
+
+        // Check if we have another definition list
+        if (Array.IndexOf(OpeningCharacters!, processor.CurrentChar) >= 0)
+        {
             var startPosition = processor.Start;
-
             var column = processor.ColumnBeforeIndent;
             processor.NextChar();
             processor.ParseIndent();
@@ -40,8 +138,13 @@ namespace Markdig.Extensions.DefinitionLists
             // We expect to have a least
             if (delta < 4)
             {
-                // Return back to original position
-                processor.GoToColumn(column);
+                // Remove the blankline before breaking this definition item
+                if (lastBlankLine != null)
+                {
+                    definitionItem.RemoveAt(definitionItem.Count - 1);
+                }
+
+                list.Span.End = list.LastChild!.Span.End;
                 return BlockState.None;
             }
 
@@ -50,148 +153,43 @@ namespace Markdig.Extensions.DefinitionLists
                 processor.GoToColumn(column + 4);
             }
 
-            var previousParent = paragraphBlock.Parent!;
-            var currentDefinitionList = GetCurrentDefinitionList(paragraphBlock, previousParent);
-
-            processor.Discard(paragraphBlock);
-
-            // If the paragraph block was not part of the opened blocks, we need to remove it manually from its parent container
-            if (paragraphBlock.Parent != null)
+            processor.Close(definitionItem);
+            var nextDefinitionItem = new DefinitionItem(this)
             {
-                paragraphBlock.Parent.Remove(paragraphBlock);
-            }
-
-            if (currentDefinitionList is null)
-            {
-                currentDefinitionList = new DefinitionList(this)
-                {
-                    Span = new SourceSpan(paragraphBlock.Span.Start, processor.Line.End),
-                    Column = paragraphBlock.Column,
-                    Line = paragraphBlock.Line,
-                };
-                previousParent.Add(currentDefinitionList);
-            }
-
-            var definitionItem = new DefinitionItem(this)
-            {
-                Line = processor.LineIndex,
-                Column = column,
                 Span = new SourceSpan(startPosition, processor.Line.End),
+                Line = processor.LineIndex,
+                Column = processor.Column,
                 OpeningCharacter = processor.CurrentChar,
             };
-
-            for (int i = 0; i < paragraphBlock.Lines.Count; i++)
-            {
-                var line = paragraphBlock.Lines.Lines[i];
-                var term = new DefinitionTerm(this)
-                {
-                    Column =  paragraphBlock.Column,
-                    Line = line.Line,
-                    Span = new SourceSpan(paragraphBlock.Span.Start, paragraphBlock.Span.End),
-                    IsOpen = false
-                };
-                term.AppendLine(ref line.Slice, line.Column, line.Line, line.Position, processor.TrackTrivia);
-                definitionItem.Add(term);
-            }
-            currentDefinitionList.Add(definitionItem);
-            processor.Open(definitionItem);
-
-            // Update the end position
-            currentDefinitionList.UpdateSpanEnd(processor.Line.End);
+            list.Add(nextDefinitionItem);
+            processor.Open(nextDefinitionItem);
 
             return BlockState.Continue;
         }
 
-        private static DefinitionList? GetCurrentDefinitionList(ParagraphBlock paragraphBlock, ContainerBlock previousParent)
+        var isBreakable = definitionItem.LastChild?.IsBreakable ?? true;
+        if (processor.IsBlankLine)
         {
-            var index = previousParent.IndexOf(paragraphBlock) - 1;
-            if (index < 0) return null;
-            var lastBlock = previousParent[index];
-            if (lastBlock is BlankLineBlock)
+            if (lastBlankLine is null && isBreakable)
             {
-                lastBlock = previousParent[index - 1];
-                previousParent.RemoveAt(index);
+                definitionItem.Add(new BlankLineBlock());
             }
-            return lastBlock as DefinitionList;
+            return isBreakable ? BlockState.ContinueDiscard : BlockState.Continue;
         }
 
-        public override BlockState TryContinue(BlockProcessor processor, Block block)
+        var paragraphBlock = definitionItem.LastChild as ParagraphBlock;
+        if (lastBlankLine is null && paragraphBlock != null)
         {
-            var definitionItem = (DefinitionItem)block;
-            if (processor.IsCodeIndent)
-            {
-                processor.GoToCodeIndent();
-                return BlockState.Continue;
-            }
-
-            var list = (DefinitionList)definitionItem.Parent!;
-            var lastBlankLine = definitionItem.LastChild as BlankLineBlock;
-
-            // Check if we have another definition list
-            if (Array.IndexOf(OpeningCharacters!, processor.CurrentChar) >= 0)
-            {
-                var startPosition = processor.Start;
-                var column = processor.ColumnBeforeIndent;
-                processor.NextChar();
-                processor.ParseIndent();
-                var delta = processor.Column - column;
-
-                // We expect to have a least
-                if (delta < 4)
-                {
-                    // Remove the blankline before breaking this definition item
-                    if (lastBlankLine != null)
-                    {
-                        definitionItem.RemoveAt(definitionItem.Count - 1);
-                    }
-
-                    list.Span.End = list.LastChild!.Span.End;
-                    return BlockState.None;
-                }
-
-                if (delta > 4)
-                {
-                    processor.GoToColumn(column + 4);
-                }
-
-                processor.Close(definitionItem);
-                var nextDefinitionItem = new DefinitionItem(this)
-                {
-                    Span = new SourceSpan(startPosition, processor.Line.End),
-                    Line = processor.LineIndex,
-                    Column = processor.Column,
-                    OpeningCharacter = processor.CurrentChar,
-                };
-                list.Add(nextDefinitionItem);
-                processor.Open(nextDefinitionItem);
-
-                return BlockState.Continue;
-            }
-
-            var isBreakable = definitionItem.LastChild?.IsBreakable ?? true;
-            if (processor.IsBlankLine)
-            {
-                if (lastBlankLine is null && isBreakable)
-                {
-                    definitionItem.Add(new BlankLineBlock());
-                }
-                return isBreakable ? BlockState.ContinueDiscard : BlockState.Continue;
-            }
-
-            var paragraphBlock = definitionItem.LastChild as ParagraphBlock;
-            if (lastBlankLine is null && paragraphBlock != null)
-            {
-                return BlockState.Continue;
-            }
-
-            // Remove the blankline before breaking this definition item
-            if (lastBlankLine != null)
-            {
-                definitionItem.RemoveAt(definitionItem.Count - 1);
-            }
-
-            list.Span.End = list.LastChild!.Span.End;
-            return BlockState.Break;
+            return BlockState.Continue;
         }
+
+        // Remove the blankline before breaking this definition item
+        if (lastBlankLine != null)
+        {
+            definitionItem.RemoveAt(definitionItem.Count - 1);
+        }
+
+        list.Span.End = list.LastChild!.Span.End;
+        return BlockState.Break;
     }
 }

src/Markdig/Extensions/DefinitionLists/DefinitionTerm.cs

@@ -5,21 +5,20 @@
 using Markdig.Parsers;
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.DefinitionLists
+namespace Markdig.Extensions.DefinitionLists;
+
+/// <summary>
+/// A definition term contains a single line with the term to define.
+/// </summary>
+/// <seealso cref="LeafBlock" />
+public class DefinitionTerm : LeafBlock
 {
     /// <summary>
-    /// A definition term contains a single line with the term to define.
+    /// Initializes a new instance of the <see cref="DefinitionTerm"/> class.
     /// </summary>
-    /// <seealso cref="LeafBlock" />
-    public class DefinitionTerm : LeafBlock
+    /// <param name="parser">The parser used to create this block.</param>
+    public DefinitionTerm(BlockParser parser) : base(parser)
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="DefinitionTerm"/> class.
-        /// </summary>
-        /// <param name="parser">The parser used to create this block.</param>
-        public DefinitionTerm(BlockParser parser) : base(parser)
-        {
-            ProcessInlines = true;
-        }
+        ProcessInlines = true;
     }
 }

src/Markdig/Extensions/DefinitionLists/HtmlDefinitionListRenderer.cs

@@ -6,80 +6,79 @@ using Markdig.Renderers;
 using Markdig.Renderers.Html;
 using Markdig.Syntax;
 
-namespace Markdig.Extensions.DefinitionLists
+namespace Markdig.Extensions.DefinitionLists;
+
+/// <summary>
+/// A HTML renderer for <see cref="DefinitionList"/>, <see cref="DefinitionItem"/> and <see cref="DefinitionTerm"/>.
+/// </summary>
+/// <seealso cref="HtmlObjectRenderer{DefinitionList}" />
+public class HtmlDefinitionListRenderer : HtmlObjectRenderer<DefinitionList>
 {
-    /// <summary>
-    /// A HTML renderer for <see cref="DefinitionList"/>, <see cref="DefinitionItem"/> and <see cref="DefinitionTerm"/>.
-    /// </summary>
-    /// <seealso cref="HtmlObjectRenderer{DefinitionList}" />
-    public class HtmlDefinitionListRenderer : HtmlObjectRenderer<DefinitionList>
+    protected override void Write(HtmlRenderer renderer, DefinitionList list)
     {
-        protected override void Write(HtmlRenderer renderer, DefinitionList list)
+        renderer.EnsureLine();
+        renderer.Write("<dl").WriteAttributes(list).WriteLine('>');
+        foreach (var item in list)
         {
-            renderer.EnsureLine();
-            renderer.Write("<dl").WriteAttributes(list).WriteLine('>');
-            foreach (var item in list)
+            bool hasOpendd = false;
+            var definitionItem = (DefinitionItem) item;
+            int countdd = 0;
+            bool lastWasSimpleParagraph = false;
+            for (int i = 0; i < definitionItem.Count; i++)
             {
-                bool hasOpendd = false;
-                var definitionItem = (DefinitionItem) item;
-                int countdd = 0;
-                bool lastWasSimpleParagraph = false;
-                for (int i = 0; i < definitionItem.Count; i++)
+                var definitionTermOrContent = definitionItem[i];
+                var definitionTerm = definitionTermOrContent as DefinitionTerm;
+                if (definitionTerm != null)
                 {
-                    var definitionTermOrContent = definitionItem[i];
-                    var definitionTerm = definitionTermOrContent as DefinitionTerm;
-                    if (definitionTerm != null)
+                    if (hasOpendd)
                     {
-                        if (hasOpendd)
+                        if (!lastWasSimpleParagraph)
                         {
-                            if (!lastWasSimpleParagraph)
-                            {
-                                renderer.EnsureLine();
-                            }
-                            renderer.WriteLine("</dd>");
-                            lastWasSimpleParagraph = false;
-                            hasOpendd = false;
-                            countdd = 0;
+                            renderer.EnsureLine();
                         }
-                        renderer.Write("<dt").WriteAttributes(definitionTerm).Write('>');
-                        renderer.WriteLeafInline(definitionTerm);
-                        renderer.WriteLine("</dt>");
-                    }
-                    else
-                    {
-                        if (!hasOpendd)
-                        {
-                            renderer.Write("<dd").WriteAttributes(definitionItem).Write('>');
-                            countdd = 0;
-                            hasOpendd = true;
-                        }
-
-                        var nextTerm = i + 1 < definitionItem.Count ? definitionItem[i + 1] : null;
-                        bool isSimpleParagraph = (nextTerm is null || nextTerm is DefinitionItem) && countdd == 0 &&
-                                                 definitionTermOrContent is ParagraphBlock;
-
-                        var saveImplicitParagraph = renderer.ImplicitParagraph;
-                        if (isSimpleParagraph)
-                        {
-                            renderer.ImplicitParagraph = true;
-                            lastWasSimpleParagraph = true;
-                        }
-                        renderer.Write(definitionTermOrContent);
-                        renderer.ImplicitParagraph = saveImplicitParagraph;
-                        countdd++;
+                        renderer.WriteLine("</dd>");
+                        lastWasSimpleParagraph = false;
+                        hasOpendd = false;
+                        countdd = 0;
                     }
+                    renderer.Write("<dt").WriteAttributes(definitionTerm).Write('>');
+                    renderer.WriteLeafInline(definitionTerm);
+                    renderer.WriteLine("</dt>");
                 }
-                if (hasOpendd)
+                else
                 {
-                    if (!lastWasSimpleParagraph)
+                    if (!hasOpendd)
                     {
-                        renderer.EnsureLine();
+                        renderer.Write("<dd").WriteAttributes(definitionItem).Write('>');
+                        countdd = 0;
+                        hasOpendd = true;
                     }
-                    renderer.WriteLine("</dd>");
+
+                    var nextTerm = i + 1 < definitionItem.Count ? definitionItem[i + 1] : null;
+                    bool isSimpleParagraph = (nextTerm is null || nextTerm is DefinitionItem) && countdd == 0 &&
+                                             definitionTermOrContent is ParagraphBlock;
+
+                    var saveImplicitParagraph = renderer.ImplicitParagraph;
+                    if (isSimpleParagraph)
+                    {
+                        renderer.ImplicitParagraph = true;
+                        lastWasSimpleParagraph = true;
+                    }
+                    renderer.Write(definitionTermOrContent);
+                    renderer.ImplicitParagraph = saveImplicitParagraph;
+                    countdd++;
                 }
             }
-            renderer.EnsureLine();
-            renderer.WriteLine("</dl>");
+            if (hasOpendd)
+            {
+                if (!lastWasSimpleParagraph)
+                {
+                    renderer.EnsureLine();
+                }
+                renderer.WriteLine("</dd>");
+            }
         }
+        renderer.EnsureLine();
+        renderer.WriteLine("</dl>");
     }
 }

src/Markdig/Extensions/Diagrams/DiagramExtension.cs

@@ -5,27 +5,26 @@
 using Markdig.Renderers;
 using Markdig.Renderers.Html;
 
-namespace Markdig.Extensions.Diagrams
-{
-    /// <summary>
-    /// Extension to allow diagrams.
-    /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class DiagramExtension : IMarkdownExtension
-    {
-        public void Setup(MarkdownPipelineBuilder pipeline)
-        {
-        }
+namespace Markdig.Extensions.Diagrams;
 
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+/// <summary>
+/// Extension to allow diagrams.
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class DiagramExtension : IMarkdownExtension
+{
+    public void Setup(MarkdownPipelineBuilder pipeline)
+    {
+    }
+
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+        if (renderer is HtmlRenderer htmlRenderer)
         {
-            if (renderer is HtmlRenderer htmlRenderer)
-            {
-                var codeRenderer = htmlRenderer.ObjectRenderers.FindExact<CodeBlockRenderer>()!;
-                // TODO: Add other well known diagram languages
-                codeRenderer.BlocksAsDiv.Add("mermaid");
-                codeRenderer.BlocksAsDiv.Add("nomnoml");
-            }
+            var codeRenderer = htmlRenderer.ObjectRenderers.FindExact<CodeBlockRenderer>()!;
+            // TODO: Add other well known diagram languages
+            codeRenderer.BlocksAsDiv.Add("mermaid");
+            codeRenderer.BlocksAsDiv.Add("nomnoml");
         }
     }
 }

src/Markdig/Extensions/Emoji/EmojiExtension.cs

@@ -4,32 +4,31 @@
 
 using Markdig.Renderers;
 
-namespace Markdig.Extensions.Emoji
+namespace Markdig.Extensions.Emoji;
+
+/// <summary>
+/// Extension to allow emoji shortcodes and smileys replacement.
+/// </summary>
+/// <seealso cref="IMarkdownExtension" />
+public class EmojiExtension : IMarkdownExtension
 {
-    /// <summary>
-    /// Extension to allow emoji shortcodes and smileys replacement.
-    /// </summary>
-    /// <seealso cref="IMarkdownExtension" />
-    public class EmojiExtension : IMarkdownExtension
+    public EmojiExtension(EmojiMapping emojiMapping)
     {
-        public EmojiExtension(EmojiMapping emojiMapping)
-        {
-            EmojiMapping = emojiMapping;
-        }
+        EmojiMapping = emojiMapping;
+    }
 
-        public EmojiMapping EmojiMapping { get; }
+    public EmojiMapping EmojiMapping { get; }
 
-        public void Setup(MarkdownPipelineBuilder pipeline)
-        {
-            if (!pipeline.InlineParsers.Contains<EmojiParser>())
-            {
-                // Insert the parser before any other parsers
-                pipeline.InlineParsers.Insert(0, new EmojiParser(EmojiMapping));
-            }
-        }
-
-        public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    public void Setup(MarkdownPipelineBuilder pipeline)
+    {
+        if (!pipeline.InlineParsers.Contains<EmojiParser>())
         {
+            // Insert the parser before any other parsers
+            pipeline.InlineParsers.Insert(0, new EmojiParser(EmojiMapping));
         }
     }
+
+    public void Setup(MarkdownPipeline pipeline, IMarkdownRenderer renderer)
+    {
+    }
 }

src/Markdig/Extensions/Emoji/EmojiInline.cs

@@ -5,35 +5,34 @@
 using Markdig.Helpers;
 using Markdig.Syntax.Inlines;
 
-namespace Markdig.Extensions.Emoji
+namespace Markdig.Extensions.Emoji;
+
+/// <summary>
+/// An emoji inline.
+/// </summary>
+/// <seealso cref="Inline" />
+public class EmojiInline : LiteralInline
 {
+    // Inherit from LiteralInline so that rendering is already handled by default
+
     /// <summary>
-    /// An emoji inline.
+    /// Initializes a new instance of the <see cref="EmojiInline"/> class.
     /// </summary>
-    /// <seealso cref="Inline" />
-    public class EmojiInline : LiteralInline
+    public EmojiInline()
     {
-        // Inherit from LiteralInline so that rendering is already handled by default
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="EmojiInline"/> class.
-        /// </summary>
-        public EmojiInline()
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="EmojiInline"/> class.
-        /// </summary>
-        /// <param name="content">The content.</param>
-        public EmojiInline(string content)
-        {
-            Content = new StringSlice(content);
-        }
-
-        /// <summary>
-        /// Gets or sets the original match string (either an emoji shortcode or a text smiley)
-        /// </summary>
-        public string? Match { get; set; }
     }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="EmojiInline"/> class.
+    /// </summary>
+    /// <param name="content">The content.</param>
+    public EmojiInline(string content)
+    {
+        Content = new StringSlice(content);
+    }
+
+    /// <summary>
+    /// Gets or sets the original match string (either an emoji shortcode or a text smiley)
+    /// </summary>
+    public string? Match { get; set; }
 }