Bump to 0.26.0

Fixes xoofx/markdig#567

.github/workflows/ci.yml

@@ -20,16 +20,16 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v1
 
-    - name: Install .NET Core
+    - name: Install .NET 5.0
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 3.0.100
+        dotnet-version: '5.0.x'
 
     - name: Build (Release)
       run: dotnet build src -c Release
-
+      
     - name: SpecFileGen
-      run: dotnet src/SpecFileGen/bin/Release/netcoreapp2.1/SpecFileGen.dll
+      run: dotnet src/SpecFileGen/bin/Release/net5.0/SpecFileGen.dll
 
     - name: Test (Release)
       run: dotnet test src -c Release
@@ -38,14 +38,14 @@ jobs:
       run: dotnet test src -c Debug
 
     - name: Coverlet
-      run: dotnet test src -c Release -f netcoreapp2.1 /p:Include=\"[${{env.PROJECT_NAME}}]*\" /p:CollectCoverage=true /p:CoverletOutputFormat=lcov
+      run: dotnet test src -c Release -f net5.0 /p:Include=\"[${{env.PROJECT_NAME}}]*\" /p:CollectCoverage=true /p:CoverletOutputFormat=lcov
 
     - name: Coveralls Upload
       uses: coverallsapp/github-action@v1.0.1
       if: github.event_name == 'push' && github.ref == 'refs/heads/master'
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
-        path-to-lcov: src/${{env.PROJECT_NAME}}.Tests/coverage.netcoreapp2.1.info
+        path-to-lcov: src/${{env.PROJECT_NAME}}.Tests/coverage.info
 
     - name: Pack
       run: dotnet pack src -c Release

changelog.md

@@ -1,5 +1,32 @@
 # Changelog
 
+## 0.26.0 (27 Aug 2021)
+- Fix rendering diff between line endings ([PR #560](https://github.com/lunet-io/markdig/pull/560))
+- Make Mathematics extension respect EnableHtml* options ([PR #570](https://github.com/lunet-io/markdig/pull/570))
+
+## 0.25.0 (10 June 2021)
+- Fix regression when parsing link reference definitions (#543)
+- Make digits in JiraKey's posible ([PR #548](https://github.com/lunet-io/markdig/pull/548))
+
+## 0.24.0 (20 Mar 2021)
+- Add support for roundtrip Markdown ([PR #481](https://github.com/lunet-io/markdig/pull/481))
+- Introduction of nullability ([PR #522](https://github.com/lunet-io/markdig/pull/522) [PR #524](https://github.com/lunet-io/markdig/pull/524) [PR #525](https://github.com/lunet-io/markdig/pull/525) [PR #526](https://github.com/lunet-io/markdig/pull/526) [PR #527](https://github.com/lunet-io/markdig/pull/527))
+- Various internal cleanup and small performance improvements ([PR #521](https://github.com/lunet-io/markdig/pull/521) [PR #524](https://github.com/lunet-io/markdig/pull/524) [PR #525](https://github.com/lunet-io/markdig/pull/525) [PR #529](https://github.com/lunet-io/markdig/pull/529) [PR #531](https://github.com/lunet-io/markdig/pull/531) [PR #532](https://github.com/lunet-io/markdig/pull/532))
+
+## 0.23.0 (16 Jan 2021)
+- Add depth limits to avoid pathological-case parsing times/StackOverflows (#500)
+- Breaking change: rename AutolineInlineParser to AutolinkInlineParser
+
+## 0.22.1 (2 Dec 2020)
+- Update logo for NuGet package
+
+## 0.22.0 (05 Oct 2020)
+- Fix Setext headings in block quotes.
+- Fix tel: treated as autolink ([PR #478](https://github.com/lunet-io/markdig/pull/478))
+- Make Inline.FirstParentOfType public ([PR #474](https://github.com/lunet-io/markdig/pull/474))
+- Fix `&` to be parsed as a punctuation while it was detected as a html entity in certain cases ([PR #471](https://github.com/lunet-io/markdig/pull/471))
+- Add ParentBlock property to ContainerInline ([PR #468](https://github.com/lunet-io/markdig/pull/468))
+
 ## 0.21.1 (17 Aug 2020)
 - Fix Markdig.Signed on GitHub Actions
 

img/markdig.svg

@@ -14,11 +14,11 @@
    viewBox="0 0 192 192"
    id="svg2"
    version="1.1"
-   inkscape:version="0.91 r13725"
+   inkscape:version="0.92.4 (5da689c313, 2019-01-14)"
    sodipodi:docname="markdig.svg"
-   inkscape:export-filename="C:\Code\lunet-io\markdig\markdig.png"
-   inkscape:export-xdpi="93.400002"
-   inkscape:export-ydpi="93.400002">
+   inkscape:export-filename="C:\code\lunet\markdig\img\markdig.png"
+   inkscape:export-xdpi="256"
+   inkscape:export-ydpi="256">
   <defs
      id="defs4" />
   <sodipodi:namedview
@@ -28,16 +28,16 @@
      borderopacity="1.0"
      inkscape:pageopacity="0.0"
      inkscape:pageshadow="2"
-     inkscape:zoom="4.4374889"
-     inkscape:cx="174.14769"
-     inkscape:cy="93.189838"
+     inkscape:zoom="6.275557"
+     inkscape:cx="81.620292"
+     inkscape:cy="119.68434"
      inkscape:document-units="px"
      inkscape:current-layer="layer1"
      showgrid="false"
-     inkscape:window-width="2560"
-     inkscape:window-height="1377"
-     inkscape:window-x="-8"
-     inkscape:window-y="-8"
+     inkscape:window-width="3840"
+     inkscape:window-height="2066"
+     inkscape:window-x="-11"
+     inkscape:window-y="-11"
      inkscape:window-maximized="1"
      units="px" />
   <metadata
@@ -48,7 +48,7 @@
         <dc:format>image/svg+xml</dc:format>
         <dc:type
            rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
+        <dc:title />
       </cc:Work>
     </rdf:RDF>
   </metadata>
@@ -59,13 +59,8 @@
      style="display:inline"
      transform="translate(0,-860.36216)">
     <path
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-       transform="translate(0,860.36216)"
-       id="path4140" />
-    <path
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+       style="fill:#006680;fill-opacity:1;stroke-width:1.09204066"
+       d="m 34.5307,873.24547 c -1.506145,1.5557 -2.414834,3.72567 -2.403331,6.22497 l 0.04173,27.41047 -19.903814,-0.0324 c -4.824408,-0.009 -8.4381391,3.7242 -8.4300642,8.70738 0.00817,4.98312 3.6330369,8.72727 8.4573232,8.73554 l 19.903821,0.0324 -0.275791,17.12991 124.244306,-0.42328 -0.0273,-17.44297 20.80798,-0.27883 c 2.4087,0.009 4.52205,-0.92824 6.02671,-2.48239 1.50614,-1.55569 2.41486,-3.72569 2.40336,-6.225 -0.009,-4.98311 -3.63306,-8.7273 -8.45733,-8.73554 l -20.50656,0.59015 0.25961,-27.09914 c -0.31244,-2.17456 -1.213,-4.36429 -3.02472,-6.23561 -1.50705,-1.55665 -3.62738,-2.49321 -6.03475,-2.50058 l -107.054134,0.14282 c -2.408688,-0.009 -4.522059,0.92823 -6.026707,2.48237 z m 27.829505,3.83665 14.459233,0.0217 14.488635,21.31347 14.429017,-21.27019 14.45922,0.0217 0.0811,57.91281 -14.4592,-0.0217 -0.0464,-33.21443 -14.428869,21.27005 -14.488819,-21.31366 0.04632,33.21458 -14.459226,-0.0218 -0.08116,-57.91275 z"
        id="path4142"
        inkscape:connector-curvature="0" />
     <rect
@@ -95,7 +90,7 @@
     <flowRoot
        xml:space="preserve"
        id="flowRoot4797"
-       style="font-style:normal;font-weight:normal;font-size:40px;line-height:125%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       style="font-style:normal;font-weight:normal;line-height:0.01%;font-family:sans-serif;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
        transform="matrix(0.1746417,0,0,0.1459084,499.69318,366.39614)"><flowRegion
          id="flowRegion4799"><rect
            id="rect4801"
@@ -103,7 +98,8 @@
            height="618.71844"
            x="959.01355"
            y="-976.15039" /></flowRegion><flowPara
-         id="flowPara4803" /></flowRoot>    <g
+         id="flowPara4803"
+         style="font-size:40px;line-height:1.25"> </flowPara></flowRoot>    <g
        id="g4833"
        transform="matrix(0.09510056,0,0,0.09061765,496.09965,368.83934)">
       <rect
@@ -114,18 +110,20 @@
          y="0"
          style="fill:#ffffff" />
     </g>
-    <path
-       inkscape:connector-curvature="0"
-       id="path4886"
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     <g
        transform="translate(234.63786,787.55486)"
        id="g4170" />
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+       sodipodi:nodetypes="cccccccccccccc"
+       inkscape:connector-curvature="0"
+       id="path826"
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+       style="fill:#ff6600;stroke-width:1.2582258" />
+    <path
+       style="fill:#c83737;stroke-width:1.2582258"
+       d="m 45.058494,943.54749 20.013843,88.87081 c -8.87e-4,1.4793 13.909884,7.9857 28.77803,7.9868 14.868153,0 27.732473,-6.0454 27.727033,-7.5199 l 17.1004,-89.73688 z m 35.561125,8.36596 h 25.853221 l 10e-6,42.86491 h 13.18189 l -26.108514,40.41734 -26.324515,-40.20925 13.397908,-0.20809 z"
+       id="path828"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cccccccccccccc" />
   </g>
 </svg>

readme.md

@@ -1,4 +1,4 @@
-# Markdig [![Build Status](https://github.com/lunet-io/markdig/workflows/ci/badge.svg?branch=master)](https://github.com/lunet-io/markdig/actions) [![Coverage Status](https://coveralls.io/repos/github/lunet-io/markdig/badge.svg?branch=master)](https://coveralls.io/github/lunet-io/markdig?branch=master) [![NuGet](https://img.shields.io/nuget/v/Markdig.svg)](https://www.nuget.org/packages/Markdig/) [![Donate](https://www.paypalobjects.com/en_US/i/btn/btn_donate_SM.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=FRGHXBTP442JL)
+# Markdig [![Build Status](https://github.com/lunet-io/markdig/workflows/ci/badge.svg?branch=master)](https://github.com/lunet-io/markdig/actions) [![Coverage Status](https://coveralls.io/repos/github/xoofx/markdig/badge.svg?branch=master)](https://coveralls.io/github/xoofx/markdig?branch=master) [![NuGet](https://img.shields.io/nuget/v/Markdig.svg)](https://www.nuget.org/packages/Markdig/) [![Donate](https://www.paypalobjects.com/en_US/i/btn/btn_donate_SM.gif)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=FRGHXBTP442JL)
 
 <img align="right" width="160px" height="160px" src="img/markdig.png">
 
@@ -19,6 +19,7 @@ You can **try Markdig online** and compare it to other implementations on [babel
   - including **GFM fenced code blocks**.  
 - **Extensible** architecture
   - Even the core Markdown/CommonMark parsing is pluggable, so it allows to disable builtin Markdown/Commonmark parsing (e.g [Disable HTML parsing](https://github.com/lunet-io/markdig/blob/7964bd0160d4c18e4155127a4c863d61ebd8944a/src/Markdig/MarkdownExtensions.cs#L306)) or change behaviour (e.g change matching `#` of a headers with `@`)   
+- [**Roundtrip support**](./src/Markdig/Roundtrip.md): Parses trivia (whitespace, newlines and other characters) to support lossless parse ⭢ render roundtrip. This enables changing markdown documents without introducing undesired trivia changes.
 - Built-in with **20+ extensions**, including:
   - 2 kind of tables:
     - [**Pipe tables**](src/Markdig.Tests/Specs/PipeTableSpecs.md) (inspired from GitHub tables and [PanDoc - Pipe Tables](http://pandoc.org/README.html#extension-pipe_tables))
@@ -59,6 +60,7 @@ If you are looking for support for an old .NET Framework 3.5 or 4.0, you can dow
 - [**WPF/XAML Markdown Renderer**: `markdig.wpf`](https://github.com/Kryptos-FR/markdig.wpf)
 - [**WPF/XAML Markdown Renderer**: `Neo.Markdig.Xaml`](https://github.com/neolithos/NeoMarkdigXaml)
 - [**Syntax highlighting**: `Markdig.SyntaxHighlighting`](https://github.com/RichardSlater/Markdig.SyntaxHighlighting)
+- [**Syntax highlighting using Prism.js**: `WebStoating.Markdig.Prism`](https://github.com/ilich/Markdig.Prism)
 - [**Embedded C# scripting**: `Markdig.Extensions.ScriptCs`](https://github.com/macaba/Markdig.Extensions.ScriptCs)
 
 ## Documentation
@@ -94,6 +96,8 @@ var pipeline = new MarkdownPipelineBuilder().UseAdvancedExtensions().Build();
 var result = Markdown.ToHtml("This is a text with some *emphasis*", pipeline);
 ```
 
+[Try it online!](https://dotnetfiddle.net/GoZXyI)
+
 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)
 
 ## Build

src/Markdig.Benchmarks/Markdig.Benchmarks.csproj

@@ -36,12 +36,12 @@
     </Content>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.10.6" />
-    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.10.6" />
+    <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
+    <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.12.1" />
     <PackageReference Include="CommonMark.NET" Version="0.15.1" />
-    <PackageReference Include="MarkdownSharp" Version="1.13.0.0" />
-    <PackageReference Include="Microsoft.Diagnostics.Runtime" Version="0.8.31-beta" />
-    <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent" Version="1.0.41.0" />
+    <PackageReference Include="MarkdownSharp" Version="2.0.5" />
+    <PackageReference Include="Microsoft.Diagnostics.Runtime" Version="2.0.161401" />
+    <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent" Version="2.0.62" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Markdig\Markdig.csproj" />

src/Markdig.Tests/Markdig.Tests.csproj

@@ -1,19 +1,20 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-  	<TargetFrameworks>net452;netcoreapp2.1;netcoreapp3.1</TargetFrameworks>
-    <OutputType>Library</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+    <OutputType>Exe</OutputType>
     <IsPackable>false</IsPackable>
+    <StartupObject>Markdig.Tests.Program</StartupObject>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="coverlet.msbuild" Version="2.8.1">
+    <PackageReference Include="coverlet.msbuild" Version="2.9.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.0.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
     <PackageReference Include="NUnit" Version="3.12.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.13.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
   </ItemGroup>
 
   <ItemGroup>

src/Markdig.Tests/MiscTests.cs

@@ -62,6 +62,29 @@ namespace Markdig.Tests
             }
         }
 
+        [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)
+            {
+                Exception e = Assert.Throws<ArgumentException>(test);
+                Assert.True(e.Message.Contains("depth limit"));
+            }
+            else
+            {
+                test();
+            }
+        }
+
         [Test]
         public void IsIssue356Corrected()
         {

src/Markdig.Tests/NormalizeSpecs/Headings.generated.cs

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //             Headings
@@ -79,15 +78,15 @@ namespace Markdig.Tests.Specs.Normalize.Headings
             //     Heading
             //     =======
             //     
-            //     Text after two newlines
+            //     Text after two newlines 1
             //
             // Should be rendered as:
             //     # Heading
             //     
-            //     Text after two newlines
+            //     Text after two newlines 1
 
             Console.WriteLine("Example 3\nSection Headings\n");
-            TestNormalize.TestSpec("Heading\n=======\n\nText after two newlines", "# Heading\n\nText after two newlines", "");
+            TestNormalize.TestSpec("Heading\n=======\n\nText after two newlines 1", "# Heading\n\nText after two newlines 1", "");
         }
     }
 }

src/Markdig.Tests/NormalizeSpecs/Headings.md

@@ -40,9 +40,9 @@ Text after two newlines
 Heading
 =======
 
-Text after two newlines
+Text after two newlines 1
 .
 # Heading
 
-Text after two newlines
+Text after two newlines 1
 ````````````````````````````````

src/Markdig.Tests/PlainTextSpecs/SamplePlainText.generated.cs

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //              Sample

src/Markdig.Tests/Program.cs

@@ -0,0 +1,19 @@
+// 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;
+
+namespace Markdig.Tests
+{
+    class Program
+    {
+        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();
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestAutoLinkInline.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestAutoLinkInline
+    {
+        [TestCase("<http://a>")]
+        [TestCase(" <http://a>")]
+        [TestCase("<http://a> ")]
+        [TestCase(" <http://a> ")]
+        [TestCase("<example@example.com>")]
+        [TestCase(" <example@example.com>")]
+        [TestCase("<example@example.com> ")]
+        [TestCase(" <example@example.com> ")]
+        [TestCase("p http://a p")]
+        public void Test(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestBackslashEscapeInline.cs

@@ -0,0 +1,67 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestBackslashEscapeInline
+    {
+        [TestCase(@"\!")]
+        [TestCase(@"\""")]
+        [TestCase(@"\#")]
+        [TestCase(@"\$")]
+        [TestCase(@"\&")]
+        [TestCase(@"\'")]
+        [TestCase(@"\(")]
+        [TestCase(@"\)")]
+        [TestCase(@"\*")]
+        [TestCase(@"\+")]
+        [TestCase(@"\,")]
+        [TestCase(@"\-")]
+        [TestCase(@"\.")]
+        [TestCase(@"\/")]
+        [TestCase(@"\:")]
+        [TestCase(@"\;")]
+        [TestCase(@"\<")]
+        [TestCase(@"\=")]
+        [TestCase(@"\>")]
+        [TestCase(@"\?")]
+        [TestCase(@"\@")]
+        [TestCase(@"\[")]
+        [TestCase(@"\\")]
+        [TestCase(@"\]")]
+        [TestCase(@"\^")]
+        [TestCase(@"\_")]
+        [TestCase(@"\`")]
+        [TestCase(@"\{")]
+        [TestCase(@"\|")]
+        [TestCase(@"\}")]
+        [TestCase(@"\~")]
+
+        // below test breaks visual studio
+        //[TestCase(@"\!\""\#\$\%\&\'\(\)\*\+\,\-\.\/\:\;\<\=\>\?\@\[\\\]\^\_\`\{\|\}\~")]
+        public void Test(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase(@"# \#\#h1")]
+        [TestCase(@"# \#\#h1\#")]
+        public void TestHeading(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase(@"`\``")]
+        [TestCase(@"` \``")]
+        [TestCase(@"`\` `")]
+        [TestCase(@"` \` `")]
+        [TestCase(@" ` \` `")]
+        [TestCase(@"` \` ` ")]
+        [TestCase(@" ` \` ` ")]
+        public void TestCodeSpanInline(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestCodeInline.cs

@@ -0,0 +1,77 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestCodeInline
+    {
+        [TestCase("``")]
+        [TestCase(" ``")]
+        [TestCase("`` ")]
+        [TestCase(" `` ")]
+
+        [TestCase("`c`")]
+        [TestCase(" `c`")]
+        [TestCase("`c` ")]
+        [TestCase(" `c` ")]
+
+        [TestCase("` c`")]
+        [TestCase(" ` c`")]
+        [TestCase("` c` ")]
+        [TestCase(" ` c` ")]
+
+        [TestCase("`c `")]
+        [TestCase(" `c `")]
+        [TestCase("`c ` ")]
+        [TestCase(" `c ` ")]
+
+        [TestCase("`c``")] // 1, 2
+        [TestCase("``c`")] // 2, 1
+        [TestCase("``c``")] // 2, 2
+
+        [TestCase("```c``")] // 2, 3
+        [TestCase("``c```")] // 3, 2
+        [TestCase("```c```")] // 3, 3
+
+        [TestCase("```c````")] // 3, 4
+        [TestCase("````c```")] // 4, 3
+        [TestCase("````c````")] // 4, 4
+
+        [TestCase("```a``` p")]
+        [TestCase("```a`b`c```")]
+        [TestCase("```a``` p\n```a``` p")]
+
+        [TestCase("` a `")]
+        [TestCase(" ` a `")]
+        [TestCase("` a ` ")]
+        [TestCase(" ` a ` ")]
+        public void Test(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("p `a` p")]
+        [TestCase("p ``a`` p")]
+        [TestCase("p ```a``` p")]
+        [TestCase("p\n\n```a``` p")]
+        public void TestParagraph(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("`\na\n`")]
+        [TestCase("`\na\r`")]
+        [TestCase("`\na\r\n`")]
+        [TestCase("`\ra\r`")]
+        [TestCase("`\ra\n`")]
+        [TestCase("`\ra\r\n`")]
+        [TestCase("`\r\na\n`")]
+        [TestCase("`\r\na\r`")]
+        [TestCase("`\r\na\r\n`")]
+        public void Test_Newlines(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestEmphasisInline.cs

@@ -0,0 +1,132 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestEmphasisInline
+    {
+        [TestCase("_t_")]
+        [TestCase("_t_t")]
+        [TestCase("t_t_")]
+        [TestCase("_t t_")]
+        [TestCase("_t\tt_")]
+        [TestCase("*t*")]
+        [TestCase("t*t*")]
+        [TestCase("*t*t")]
+        [TestCase("*t t*")]
+        [TestCase("*t\tt*")]
+
+        [TestCase(" _t_")]
+        [TestCase(" _t_t")]
+        [TestCase(" t_t_")]
+        [TestCase(" _t t_")]
+        [TestCase(" _t\tt_")]
+        [TestCase(" *t*")]
+        [TestCase(" t*t*")]
+        [TestCase(" *t*t")]
+        [TestCase(" *t t*")]
+        [TestCase(" *t\tt*")]
+
+        [TestCase("_t_")]
+        [TestCase("_t_t ")]
+        [TestCase("t_t_ ")]
+        [TestCase("_t t_ ")]
+        [TestCase("_t\tt_ ")]
+        [TestCase("*t* ")]
+        [TestCase("t*t* ")]
+        [TestCase("*t*t ")]
+        [TestCase("*t t* ")]
+        [TestCase("*t\tt* ")]
+
+        [TestCase(" _t_")]
+        [TestCase(" _t_t ")]
+        [TestCase(" t_t_ ")]
+        [TestCase(" _t t_ ")]
+        [TestCase(" _t\tt_ ")]
+        [TestCase(" *t* ")]
+        [TestCase(" t*t* ")]
+        [TestCase(" *t*t ")]
+        [TestCase(" *t t* ")]
+        [TestCase(" *t\tt* ")]
+
+        [TestCase("_t_\t")]
+        [TestCase("_t_t\t")]
+        [TestCase("t_t_\t")]
+        [TestCase("_t t_\t")]
+        [TestCase("_t\tt_\t")]
+        [TestCase("*t*\t")]
+        [TestCase("t*t*\t")]
+        [TestCase("*t*t\t")]
+        [TestCase("*t t*\t")]
+        [TestCase("*t\tt*\t")]
+        public void Test_Emphasis(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("__t__")]
+        [TestCase("__t__t")]
+        [TestCase("t__t__")]
+        [TestCase("__t t__")]
+        [TestCase("__t\tt__")]
+        [TestCase("**t**")]
+        [TestCase("**t**t")]
+        [TestCase("t**t**")]
+        [TestCase("**t\tt**")]
+
+        [TestCase(" __t__")]
+        [TestCase(" __t__t")]
+        [TestCase(" t__t__")]
+        [TestCase(" __t t__")]
+        [TestCase(" __t\tt__")]
+        [TestCase(" **t**")]
+        [TestCase(" **t**t")]
+        [TestCase(" t**t**")]
+        [TestCase(" **t\tt**")]
+
+        [TestCase("__t__ ")]
+        [TestCase("__t__t ")]
+        [TestCase("t__t__ ")]
+        [TestCase("__t t__ ")]
+        [TestCase("__t\tt__ ")]
+        [TestCase("**t** ")]
+        [TestCase("**t**t ")]
+        [TestCase("t**t** ")]
+        [TestCase("**t\tt** ")]
+
+        [TestCase(" __t__ ")]
+        [TestCase(" __t__t ")]
+        [TestCase(" t__t__ ")]
+        [TestCase(" __t t__ ")]
+        [TestCase(" __t\tt__ ")]
+        [TestCase(" **t** ")]
+        [TestCase(" **t** t")]
+        [TestCase(" t**t** ")]
+        [TestCase(" **t\tt** ")]
+
+        [TestCase("__t__\t")]
+        [TestCase("__t__t\t")]
+        [TestCase("t__t__\t ")]
+        [TestCase("__t t__\t ")]
+        [TestCase("__t\tt__\t ")]
+        [TestCase("**t**\t ")]
+        [TestCase("**t**t\t ")]
+        [TestCase("t**t**\t ")]
+        [TestCase("**t\tt**\t ")]
+
+        [TestCase(" __t__\t ")]
+        [TestCase(" __t__t\t ")]
+        [TestCase(" t__t__\t ")]
+        [TestCase(" __t t__\t ")]
+        [TestCase(" __t\tt__\t ")]
+        [TestCase(" **t**\t ")]
+        [TestCase(" **t**\t t")]
+        [TestCase(" t**t**\t ")]
+        [TestCase(" **t\tt**\t ")]
+        public void Test_StrongEmphasis(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestHtmlEntityInline.cs

@@ -0,0 +1,53 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <seealso cref="https://spec.commonmark.org/0.29/#entity-and-numeric-character-references"/>
+    [TestFixture]
+    public class TestHtmlEntityInline
+    {
+        [TestCase("&gt;")]
+        [TestCase("&lt;")]
+        [TestCase("&nbsp;")]
+        [TestCase("&heartsuit;")]
+        [TestCase("&#42;")]
+        [TestCase("&#0;")]
+        [TestCase("&#1234;")]
+        [TestCase("&#xcab;")]
+
+        [TestCase(" &gt;")]
+        [TestCase(" &lt;")]
+        [TestCase(" &nbsp;")]
+        [TestCase(" &heartsuit;")]
+        [TestCase(" &#42;")]
+        [TestCase(" &#0;")]
+        [TestCase(" &#1234;")]
+        [TestCase(" &#xcab;")]
+
+        [TestCase("&gt; ")]
+        [TestCase("&lt; ")]
+        [TestCase("&nbsp; ")]
+        [TestCase("&heartsuit; ")]
+        [TestCase("&#42; ")]
+        [TestCase("&#0; ")]
+        [TestCase("&#1234; ")]
+        [TestCase("&#xcab; ")]
+
+        [TestCase(" &gt; ")]
+        [TestCase(" &lt; ")]
+        [TestCase(" &nbsp; ")]
+        [TestCase(" &heartsuit; ")]
+        [TestCase(" &#42; ")]
+        [TestCase(" &#0; ")]
+        [TestCase(" &#1234; ")]
+        [TestCase(" &#xcab; ")]
+        public void Test(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestHtmlInline.cs

@@ -0,0 +1,27 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestHtmlInline
+    {
+        [TestCase("<em>f</em>")]
+        [TestCase("<em> f</em>")]
+        [TestCase("<em>f </em>")]
+        [TestCase("<em> f </em>")]
+        [TestCase("<b>p</b>")]
+        [TestCase("<b></b>")]
+        [TestCase("<b> </b>")]
+        [TestCase("<b>  </b>")]
+        [TestCase("<b>   </b>")]
+        [TestCase("<b>\t</b>")]
+        [TestCase("<b> \t</b>")]
+        [TestCase("<b>\t </b>")]
+        [TestCase("<b> \t </b>")]
+        public void Test(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestImageInline.cs

@@ -0,0 +1,25 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestImageInline
+    {
+        [TestCase("![](a)")]
+        [TestCase(" ![](a)")]
+        [TestCase("![](a) ")]
+        [TestCase(" ![](a) ")]
+        [TestCase("   ![description](http://example.com)")]
+        public void Test(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("paragraph   ![description](http://example.com)")]
+        public void TestParagraph(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestLineBreakInline.cs

@@ -0,0 +1,18 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestLineBreakInline
+    {
+        [TestCase("p\n")]
+        [TestCase("p\r\n")]
+        [TestCase("p\r")]
+        [TestCase("[]() ![]()  ``  ` `  `  `  ![]()   ![]()")]
+        public void Test(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestLinkInline.cs

@@ -0,0 +1,229 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestLinkInline
+    {
+        [TestCase("[a]")] // TODO: this is not a link but a paragraph
+        [TestCase("[a]()")]
+
+        [TestCase("[](b)")]
+        [TestCase(" [](b)")]
+        [TestCase("[](b) ")]
+        [TestCase(" [](b) ")]
+
+        [TestCase("[a](b)")]
+        [TestCase(" [a](b)")]
+        [TestCase("[a](b) ")]
+        [TestCase(" [a](b) ")]
+
+        [TestCase("[ a](b)")]
+        [TestCase(" [ a](b)")]
+        [TestCase("[ a](b) ")]
+        [TestCase(" [ a](b) ")]
+
+        [TestCase("[a ](b)")]
+        [TestCase(" [a ](b)")]
+        [TestCase("[a ](b) ")]
+        [TestCase(" [a ](b) ")]
+
+        [TestCase("[ a ](b)")]
+        [TestCase(" [ a ](b)")]
+        [TestCase("[ a ](b) ")]
+        [TestCase(" [ a ](b) ")]
+
+        // below cases are required for a full roundtrip but not have low prio for impl
+        [TestCase("[]( b)")]
+        [TestCase(" []( b)")]
+        [TestCase("[]( b) ")]
+        [TestCase(" []( b) ")]
+
+        [TestCase("[a]( b)")]
+        [TestCase(" [a]( b)")]
+        [TestCase("[a]( b) ")]
+        [TestCase(" [a]( b) ")]
+
+        [TestCase("[ a]( b)")]
+        [TestCase(" [ a]( b)")]
+        [TestCase("[ a]( b) ")]
+        [TestCase(" [ a]( b) ")]
+
+        [TestCase("[a ]( b)")]
+        [TestCase(" [a ]( b)")]
+        [TestCase("[a ]( b) ")]
+        [TestCase(" [a ]( b) ")]
+
+        [TestCase("[ a ]( b)")]
+        [TestCase(" [ a ]( b)")]
+        [TestCase("[ a ]( b) ")]
+        [TestCase(" [ a ]( b) ")]
+
+        [TestCase("[](b )")]
+        [TestCase(" [](b )")]
+        [TestCase("[](b ) ")]
+        [TestCase(" [](b ) ")]
+
+        [TestCase("[a](b )")]
+        [TestCase(" [a](b )")]
+        [TestCase("[a](b ) ")]
+        [TestCase(" [a](b ) ")]
+
+        [TestCase("[ a](b )")]
+        [TestCase(" [ a](b )")]
+        [TestCase("[ a](b ) ")]
+        [TestCase(" [ a](b ) ")]
+
+        [TestCase("[a ](b )")]
+        [TestCase(" [a ](b )")]
+        [TestCase("[a ](b ) ")]
+        [TestCase(" [a ](b ) ")]
+
+        [TestCase("[ a ](b )")]
+        [TestCase(" [ a ](b )")]
+        [TestCase("[ a ](b ) ")]
+        [TestCase(" [ a ](b ) ")]
+
+        [TestCase("[]( b )")]
+        [TestCase(" []( b )")]
+        [TestCase("[]( b ) ")]
+        [TestCase(" []( b ) ")]
+
+        [TestCase("[a]( b )")]
+        [TestCase(" [a]( b )")]
+        [TestCase("[a]( b ) ")]
+        [TestCase(" [a]( b ) ")]
+
+        [TestCase("[ a]( b )")]
+        [TestCase(" [ a]( b )")]
+        [TestCase("[ a]( b ) ")]
+        [TestCase(" [ a]( b ) ")]
+
+        [TestCase("[a ]( b )")]
+        [TestCase(" [a ]( b )")]
+        [TestCase("[a ]( b ) ")]
+        [TestCase(" [a ]( b ) ")]
+
+        [TestCase("[ a ]( b )")]
+        [TestCase(" [ a ]( b )")]
+        [TestCase("[ a ]( b ) ")]
+        [TestCase(" [ a ]( b ) ")]
+        public void Test(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("[a](b \"t\") ")]
+        [TestCase("[a](b \" t\") ")]
+        [TestCase("[a](b \"t \") ")]
+        [TestCase("[a](b \" t \") ")]
+
+        [TestCase("[a](b  \"t\") ")]
+        [TestCase("[a](b  \" t\") ")]
+        [TestCase("[a](b  \"t \") ")]
+        [TestCase("[a](b  \" t \") ")]
+
+        [TestCase("[a](b \"t\" ) ")]
+        [TestCase("[a](b \" t\" ) ")]
+        [TestCase("[a](b \"t \" ) ")]
+        [TestCase("[a](b \" t \" ) ")]
+
+        [TestCase("[a](b  \"t\" ) ")]
+        [TestCase("[a](b  \" t\" ) ")]
+        [TestCase("[a](b  \"t \" ) ")]
+        [TestCase("[a](b  \" t \" ) ")]
+
+        [TestCase("[a](b 't') ")]
+        [TestCase("[a](b ' t') ")]
+        [TestCase("[a](b 't ') ")]
+        [TestCase("[a](b ' t ') ")]
+
+        [TestCase("[a](b  't') ")]
+        [TestCase("[a](b  ' t') ")]
+        [TestCase("[a](b  't ') ")]
+        [TestCase("[a](b  ' t ') ")]
+
+        [TestCase("[a](b 't' ) ")]
+        [TestCase("[a](b ' t' ) ")]
+        [TestCase("[a](b 't ' ) ")]
+        [TestCase("[a](b ' t ' ) ")]
+
+        [TestCase("[a](b  't' ) ")]
+        [TestCase("[a](b  ' t' ) ")]
+        [TestCase("[a](b  't ' ) ")]
+        [TestCase("[a](b  ' t ' ) ")]
+
+        [TestCase("[a](b (t)) ")]
+        [TestCase("[a](b ( t)) ")]
+        [TestCase("[a](b (t )) ")]
+        [TestCase("[a](b ( t )) ")]
+
+        [TestCase("[a](b  (t)) ")]
+        [TestCase("[a](b  ( t)) ")]
+        [TestCase("[a](b  (t )) ")]
+        [TestCase("[a](b  ( t )) ")]
+
+        [TestCase("[a](b (t) ) ")]
+        [TestCase("[a](b ( t) ) ")]
+        [TestCase("[a](b (t ) ) ")]
+        [TestCase("[a](b ( t ) ) ")]
+
+        [TestCase("[a](b  (t) ) ")]
+        [TestCase("[a](b  ( t) ) ")]
+        [TestCase("[a](b  (t ) ) ")]
+        [TestCase("[a](b  ( t ) ) ")]
+        public void Test_Title(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("[a](<>)")]
+        [TestCase("[a]( <>)")]
+        [TestCase("[a](<> )")]
+        [TestCase("[a]( <> )")]
+
+        [TestCase("[a](< >)")]
+        [TestCase("[a]( < >)")]
+        [TestCase("[a](< > )")]
+        [TestCase("[a]( < > )")]
+
+        [TestCase("[a](<b>)")]
+        [TestCase("[a](<b >)")]
+        [TestCase("[a](< b>)")]
+        [TestCase("[a](< b >)")]
+
+        [TestCase("[a](<b b>)")]
+        [TestCase("[a](<b b >)")]
+        [TestCase("[a](< b b >)")]
+        public void Test_PointyBrackets(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("[*a*][a]")]
+        [TestCase("[a][b]")]
+        [TestCase("[a][]")]
+        [TestCase("[a]")]
+        public void Test_Inlines(string value)
+        {
+            RoundTrip(value);
+        }
+
+        // | [ a ]( b " t " ) |
+        [TestCase(" [ a ]( b \" t \" ) ")]
+        [TestCase("\v[\va\v](\vb\v\"\vt\v\"\v)\v")]
+        [TestCase("\f[\fa\f](\fb\f\"\ft\f\"\f)\f")]
+        [TestCase("\t[\ta\t](\tb\t\"\tt\t\"\t)\t")]
+        public void Test_UncommonWhitespace(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("[x]: https://example.com\r\n")]
+        public void Test_LinkReferenceDefinitionWithCarriageReturnLineFeed(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/Inlines/TestNullCharacterInline.cs

@@ -0,0 +1,37 @@
+using Markdig.Renderers.Roundtrip;
+using Markdig.Syntax;
+using NUnit.Framework;
+using System.IO;
+
+namespace Markdig.Tests.RoundtripSpecs.Inlines
+{
+    [TestFixture]
+    public class TestNullCharacterInline
+    {
+        [TestCase("\0", "\uFFFD")]
+        [TestCase("\0p", "\uFFFDp")]
+        [TestCase("p\0", "p\uFFFD")]
+        [TestCase("p\0p", "p\uFFFDp")]
+        [TestCase("p\0\0p", "p\uFFFD\uFFFDp")] // I promise you, this was not intentional
+        public void Test(string value, string expected)
+        {
+            RoundTrip(value, expected);
+        }
+
+        // this method is copied intentionally to ensure all other tests
+        // do not unintentionally use the expected parameter
+        private static void RoundTrip(string markdown, string expected)
+        {
+            var pipelineBuilder = new MarkdownPipelineBuilder();
+            pipelineBuilder.EnableTrackTrivia();
+            MarkdownPipeline pipeline = pipelineBuilder.Build();
+            MarkdownDocument markdownDocument = Markdown.Parse(markdown, pipeline);
+            var sw = new StringWriter();
+            var rr = new RoundtripRenderer(sw);
+
+            rr.Write(markdownDocument);
+
+            Assert.AreEqual(expected, sw.ToString());
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestAtxHeading.cs

@@ -0,0 +1,55 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            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("\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("# h\n\n ")]
+        [TestCase("# h\n\n  ")]
+        [TestCase("# h\n\n   ")]
+        public void TestNewline(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestExample.cs

@@ -0,0 +1,58 @@
+using Markdig.Helpers;
+using Markdig.Renderers.Roundtrip;
+using Markdig.Syntax;
+using Markdig.Syntax.Inlines;
+using NUnit.Framework;
+using System.IO;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [TestFixture]
+    public class TestExample
+    {
+        [Test]
+        public void Test()
+        {
+            var markdown = $@"
+# Test document
+This document contains an unordered list. It uses tabs to indent. This test demonstrates
+a method of making the input markdown uniform without altering any other markdown in the
+resulting output file.
+
+- item1
+
+>look, ma:
+> my space is not normalized!
+";
+            MarkdownDocument markdownDocument = Markdown.Parse(markdown, trackTrivia: true);
+            var listBlock = markdownDocument[2] as ListBlock;
+            var listItem = listBlock[0] as ListItemBlock;
+            var paragraph = listItem[0] as ParagraphBlock;
+            var containerInline = new ContainerInline();
+            containerInline.AppendChild(new LiteralInline(" my own text!"));
+            containerInline.AppendChild(new LineBreakInline { NewLine = NewLine.CarriageReturnLineFeed });
+            paragraph.Inline = containerInline;
+
+            var sw = new StringWriter();
+            var rr = new RoundtripRenderer(sw);
+            rr.Write(markdownDocument);
+            var outputMarkdown = sw.ToString();
+            var expected = $@"
+# Test document
+This document contains an unordered list. It uses tabs to indent. This test demonstrates
+a method of making the input markdown uniform without altering any other markdown in the
+resulting output file.
+
+- my own text!
+
+>look, ma:
+> my space is not normalized!
+";
+
+            expected = expected.Replace("\r\n", "\n").Replace("\r", "\n");
+            outputMarkdown = outputMarkdown.Replace("\r\n", "\n").Replace("\r", "\n");
+
+            Assert.AreEqual(expected, outputMarkdown);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestFencedCodeBlock.cs

@@ -0,0 +1,107 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("~~~ aa ``` ~~~\nfoo\n~~~")]
+        [TestCase("~~~ aa ``` ~~~\nfoo\n~~~ ")]
+        public void TestTilde(string value)
+        {
+            RoundTrip(value);
+        }
+
+        [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```\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("```\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```\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);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestHtmlBlock.cs

@@ -0,0 +1,20 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestIndentedCodeBlock.cs

@@ -0,0 +1,86 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            RoundTrip(value);
+        }
+
+        [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);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestLinkReferenceDefinition.cs

@@ -0,0 +1,214 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            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);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestNoBlocksFoundBlock.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestOrderedList.cs

@@ -0,0 +1,191 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            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\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\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\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\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\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\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);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestParagraph.cs

@@ -0,0 +1,247 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            RoundTrip(value);
+        }
+
+
+        [TestCase("\n")]
+        [TestCase("\r\n")]
+        [TestCase("\r")]
+
+        [TestCase("p\n")]
+        [TestCase("p\r")]
+        [TestCase("p\r\n")]
+
+        [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\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("\np\n")]
+        [TestCase("\np\r")]
+        [TestCase("\np\r\n")]
+
+        [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\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("\rp\n")]
+        [TestCase("\rp\r")]
+        [TestCase("\rp\r\n")]
+
+        [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\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("\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\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\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(" \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(" \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 ")]
+        public void Test_WhitespaceWithNewline(string value)
+        {
+            RoundTrip(value);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestQuoteBlock.cs

@@ -0,0 +1,286 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            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);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestSetextHeading.cs

@@ -0,0 +1,53 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            RoundTrip(value);
+        }
+
+        [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===\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\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

@@ -0,0 +1,53 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            RoundTrip(value);
+        }
+
+        [TestCase("\n---")]
+        [TestCase("\r---")]
+        [TestCase("\r\n---")]
+
+        [TestCase("\n---\n")]
+        [TestCase("\r---\n")]
+        [TestCase("\r\n---\n")]
+
+        [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);
+        }
+    }
+}

src/Markdig.Tests/RoundtripSpecs/TestUnorderedList.cs

@@ -0,0 +1,183 @@
+using NUnit.Framework;
+using static Markdig.Tests.TestRoundtrip;
+
+namespace Markdig.Tests.RoundtripSpecs
+{
+    [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)
+        {
+            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\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("- ```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\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\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("\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\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("\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\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("\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\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("\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\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);
+        }
+    }
+}

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

@@ -1,4 +1,3 @@
-// Generated: 2019-05-15 02:46:55
 
 // --------------------------------
 //           Abbreviations

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //         Auto Identifiers

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

@@ -1,4 +1,3 @@
-// Generated: 2020-07-21 22:02:10
 
 // --------------------------------
 //            Auto Links
@@ -61,15 +60,17 @@ namespace Markdig.Tests.Specs.AutoLinks
             //     This is not a ftp:/test.com
             //     And not a mailto:emailtoto.com
             //     And not a plain www. or a www.x 
+            //     And not a tel:
             //
             // Should be rendered as:
             //     <p>This is not a http:/www.google.com URL and https:/www.google.com
             //     This is not a ftp:/test.com
             //     And not a mailto:emailtoto.com
-            //     And not a plain www. or a www.x</p>
+            //     And not a plain www. or a www.x
+            //     And not a tel:</p>
 
             Console.WriteLine("Example 2\nSection Extensions / AutoLinks\n");
-            TestParser.TestSpec("This is not a http:/www.google.com URL and https:/www.google.com\nThis is not a ftp:/test.com\nAnd not a mailto:emailtoto.com\nAnd not a plain www. or a www.x ", "<p>This is not a http:/www.google.com URL and https:/www.google.com\nThis is not a ftp:/test.com\nAnd not a mailto:emailtoto.com\nAnd not a plain www. or a www.x</p>", "autolinks|advanced");
+            TestParser.TestSpec("This is not a http:/www.google.com URL and https:/www.google.com\nThis is not a ftp:/test.com\nAnd not a mailto:emailtoto.com\nAnd not a plain www. or a www.x \nAnd not a tel:", "<p>This is not a http:/www.google.com URL and https:/www.google.com\nThis is not a ftp:/test.com\nAnd not a mailto:emailtoto.com\nAnd not a plain www. or a www.x\nAnd not a tel:</p>", "autolinks|advanced");
         }
 
         // Previous character must be a punctuation or a valid space (tab, space, new line):

src/Markdig.Tests/Specs/AutoLinks.md

@@ -33,11 +33,13 @@ This is not a http:/www.google.com URL and https:/www.google.com
 This is not a ftp:/test.com
 And not a mailto:emailtoto.com
 And not a plain www. or a www.x 
+And not a tel:
 .
 <p>This is not a http:/www.google.com URL and https:/www.google.com
 This is not a ftp:/test.com
 And not a mailto:emailtoto.com
-And not a plain www. or a www.x</p>
+And not a plain www. or a www.x
+And not a tel:</p>
 ````````````````````````````````
 
 Previous character must be a punctuation or a valid space (tab, space, new line):

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-15 05:23:49
 
 // --------------------------------
 //             Bootstrap

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-12 15:26:42
 
 // --------------------------------
 //        CommonMark v. 0.29
@@ -14925,6 +14924,29 @@ namespace Markdig.Tests.Specs.CommonMarkV_0_29
             Console.WriteLine("Example 649\nSection Inlines / Textual content\n");
             TestParser.TestSpec("Multiple     spaces", "<p>Multiple     spaces</p>", "");
         }
+
+        // Within a blockquote a setext heading takes precedence
+        // over a thematic break:
+        [Test]
+        public void InlinesTextualContent_Example650()
+        {
+            // Example 650
+            // Section: Inlines / Textual content
+            //
+            // The following Markdown:
+            //     > Foo
+            //     > ---
+            //     > bar
+            //
+            // Should be rendered as:
+            //     <blockquote>
+            //     <h2>Foo</h2>
+            //     <p>bar</p>
+            //     </blockquote>
+
+            Console.WriteLine("Example 650\nSection Inlines / Textual content\n");
+            TestParser.TestSpec("> Foo\n> ---\n> bar", "<blockquote>\n<h2>Foo</h2>\n<p>bar</p>\n</blockquote>", "");
+        }
         // <!-- END TESTS -->
         // 
         // # Appendix: A parsing strategy

src/Markdig.Tests/Specs/CommonMark.md

@@ -9368,6 +9368,20 @@ Multiple     spaces
 <p>Multiple     spaces</p>
 ````````````````````````````````
 
+Within a blockquote a setext heading takes precedence
+over a thematic break:
+
+```````````````````````````````` example
+> Foo
+> ---
+> bar
+.
+<blockquote>
+<h2>Foo</h2>
+<p>bar</p>
+</blockquote>
+````````````````````````````````
+
 
 <!-- END TESTS -->
 

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //         Custom Containers

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-15 05:06:35
 
 // --------------------------------
 //         Definition Lists

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //             Diagrams

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

@@ -1,4 +1,3 @@
-// Generated: 2020-01-13 21:08:58
 
 // --------------------------------
 //               Emoji

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //          Emphasis Extra

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //    Figures, Footers and Cites

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-15 05:33:49
 
 // --------------------------------
 //             Footnotes

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

@@ -1,4 +1,3 @@
-// Generated: 2019-08-01 13:57:17
 
 // --------------------------------
 //        Generic Attributes

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-15 05:25:26
 
 // --------------------------------
 //           Globalization

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

@@ -1,4 +1,3 @@
-// Generated: 2020-04-20 07:21:20
 
 // --------------------------------
 //            Grid Tables

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //          Hardline Breaks

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-15 05:30:00
 
 // --------------------------------
 //            Jira Links
@@ -24,7 +23,7 @@ namespace Markdig.Tests.Specs.JiraLinks
         // 
         // The rules for detecting a link are:
         // 
-        // - The project key must be composed of one or more capitalized ASCII letter `[A-Z]+`
+        // - The project key must be composed of one or more capitalized ASCII letters or digits `[A-Z,0-9]+`
         // - A single hyphen `-` must separate the project key and issue number.
         // - The issue number is composed of 1 or more digits `[0, 9]+`
         // - The reference must be preceded by either `(` or whitespace or EOF.
@@ -54,13 +53,13 @@ namespace Markdig.Tests.Specs.JiraLinks
             // Section: Jira Links
             //
             // The following Markdown:
-            //     This is a KIRA-1 issue
+            //     This is a ABC4-123 issue
             //
             // Should be rendered as:
-            //     <p>This is a <a href="http://your.company.abc/browse/KIRA-1" target="blank">KIRA-1</a> issue</p>
+            //     <p>This is a <a href="http://your.company.abc/browse/ABC4-123" target="blank">ABC4-123</a> issue</p>
 
             Console.WriteLine("Example 2\nSection Jira Links\n");
-            TestParser.TestSpec("This is a KIRA-1 issue", "<p>This is a <a href=\"http://your.company.abc/browse/KIRA-1\" target=\"blank\">KIRA-1</a> issue</p>", "jiralinks");
+            TestParser.TestSpec("This is a ABC4-123 issue", "<p>This is a <a href=\"http://your.company.abc/browse/ABC4-123\" target=\"blank\">ABC4-123</a> issue</p>", "jiralinks");
         }
 
         [Test]
@@ -70,16 +69,15 @@ namespace Markdig.Tests.Specs.JiraLinks
             // Section: Jira Links
             //
             // The following Markdown:
-            //     This is a Z-1 issue
+            //     This is a ABC45-123 issue
             //
             // Should be rendered as:
-            //     <p>This is a <a href="http://your.company.abc/browse/Z-1" target="blank">Z-1</a> issue</p>
+            //     <p>This is a <a href="http://your.company.abc/browse/ABC45-123" target="blank">ABC45-123</a> issue</p>
 
             Console.WriteLine("Example 3\nSection Jira Links\n");
-            TestParser.TestSpec("This is a Z-1 issue", "<p>This is a <a href=\"http://your.company.abc/browse/Z-1\" target=\"blank\">Z-1</a> issue</p>", "jiralinks");
+            TestParser.TestSpec("This is a ABC45-123 issue", "<p>This is a <a href=\"http://your.company.abc/browse/ABC45-123\" target=\"blank\">ABC45-123</a> issue</p>", "jiralinks");
         }
 
-        // These are also valid links with `(` and `)`:
         [Test]
         public void JiraLinks_Example004()
         {
@@ -87,13 +85,13 @@ namespace Markdig.Tests.Specs.JiraLinks
             // Section: Jira Links
             //
             // The following Markdown:
-            //     This is a (ABCD-123) issue
+            //     This is a KIRA-1 issue
             //
             // Should be rendered as:
-            //     <p>This is a (<a href="http://your.company.abc/browse/ABCD-123" target="blank">ABCD-123</a>) issue</p>
+            //     <p>This is a <a href="http://your.company.abc/browse/KIRA-1" target="blank">KIRA-1</a> issue</p>
 
             Console.WriteLine("Example 4\nSection Jira Links\n");
-            TestParser.TestSpec("This is a (ABCD-123) issue", "<p>This is a (<a href=\"http://your.company.abc/browse/ABCD-123\" target=\"blank\">ABCD-123</a>) issue</p>", "jiralinks");
+            TestParser.TestSpec("This is a KIRA-1 issue", "<p>This is a <a href=\"http://your.company.abc/browse/KIRA-1\" target=\"blank\">KIRA-1</a> issue</p>", "jiralinks");
         }
 
         [Test]
@@ -103,15 +101,16 @@ namespace Markdig.Tests.Specs.JiraLinks
             // Section: Jira Links
             //
             // The following Markdown:
-            //     This is a (KIRA-1) issue
+            //     This is a Z-1 issue
             //
             // Should be rendered as:
-            //     <p>This is a (<a href="http://your.company.abc/browse/KIRA-1" target="blank">KIRA-1</a>) issue</p>
+            //     <p>This is a <a href="http://your.company.abc/browse/Z-1" target="blank">Z-1</a> issue</p>
 
             Console.WriteLine("Example 5\nSection Jira Links\n");
-            TestParser.TestSpec("This is a (KIRA-1) issue", "<p>This is a (<a href=\"http://your.company.abc/browse/KIRA-1\" target=\"blank\">KIRA-1</a>) issue</p>", "jiralinks");
+            TestParser.TestSpec("This is a Z-1 issue", "<p>This is a <a href=\"http://your.company.abc/browse/Z-1\" target=\"blank\">Z-1</a> issue</p>", "jiralinks");
         }
 
+        // These are also valid links with `(` and `)`:
         [Test]
         public void JiraLinks_Example006()
         {
@@ -119,16 +118,15 @@ namespace Markdig.Tests.Specs.JiraLinks
             // Section: Jira Links
             //
             // The following Markdown:
-            //     This is a (Z-1) issue
+            //     This is a (ABCD-123) issue
             //
             // Should be rendered as:
-            //     <p>This is a (<a href="http://your.company.abc/browse/Z-1" target="blank">Z-1</a>) issue</p>
+            //     <p>This is a (<a href="http://your.company.abc/browse/ABCD-123" target="blank">ABCD-123</a>) issue</p>
 
             Console.WriteLine("Example 6\nSection Jira Links\n");
-            TestParser.TestSpec("This is a (Z-1) issue", "<p>This is a (<a href=\"http://your.company.abc/browse/Z-1\" target=\"blank\">Z-1</a>) issue</p>", "jiralinks");
+            TestParser.TestSpec("This is a (ABCD-123) issue", "<p>This is a (<a href=\"http://your.company.abc/browse/ABCD-123\" target=\"blank\">ABCD-123</a>) issue</p>", "jiralinks");
         }
 
-        // These are not valid links:
         [Test]
         public void JiraLinks_Example007()
         {
@@ -136,13 +134,13 @@ namespace Markdig.Tests.Specs.JiraLinks
             // Section: Jira Links
             //
             // The following Markdown:
-            //     This is not aJIRA-123 issue
+            //     This is a (ABC4-123) issue
             //
             // Should be rendered as:
-            //     <p>This is not aJIRA-123 issue</p>
+            //     <p>This is a (<a href="http://your.company.abc/browse/ABC4-123" target="blank">ABC4-123</a>) issue</p>
 
             Console.WriteLine("Example 7\nSection Jira Links\n");
-            TestParser.TestSpec("This is not aJIRA-123 issue", "<p>This is not aJIRA-123 issue</p>", "jiralinks");
+            TestParser.TestSpec("This is a (ABC4-123) issue", "<p>This is a (<a href=\"http://your.company.abc/browse/ABC4-123\" target=\"blank\">ABC4-123</a>) issue</p>", "jiralinks");
         }
 
         [Test]
@@ -152,13 +150,13 @@ namespace Markdig.Tests.Specs.JiraLinks
             // Section: Jira Links
             //
             // The following Markdown:
-            //     This is not JIRA-123a issue
+            //     This is a (KIRA-1) issue
             //
             // Should be rendered as:
-            //     <p>This is not JIRA-123a issue</p>
+            //     <p>This is a (<a href="http://your.company.abc/browse/KIRA-1" target="blank">KIRA-1</a>) issue</p>
 
             Console.WriteLine("Example 8\nSection Jira Links\n");
-            TestParser.TestSpec("This is not JIRA-123a issue", "<p>This is not JIRA-123a issue</p>", "jiralinks");
+            TestParser.TestSpec("This is a (KIRA-1) issue", "<p>This is a (<a href=\"http://your.company.abc/browse/KIRA-1\" target=\"blank\">KIRA-1</a>) issue</p>", "jiralinks");
         }
 
         [Test]
@@ -168,13 +166,94 @@ namespace Markdig.Tests.Specs.JiraLinks
             // Section: Jira Links
             //
             // The following Markdown:
+            //     This is a (Z-1) issue
+            //
+            // Should be rendered as:
+            //     <p>This is a (<a href="http://your.company.abc/browse/Z-1" target="blank">Z-1</a>) issue</p>
+
+            Console.WriteLine("Example 9\nSection Jira Links\n");
+            TestParser.TestSpec("This is a (Z-1) issue", "<p>This is a (<a href=\"http://your.company.abc/browse/Z-1\" target=\"blank\">Z-1</a>) issue</p>", "jiralinks");
+        }
+
+        // These are not valid links:
+        [Test]
+        public void JiraLinks_Example010()
+        {
+            // Example 10
+            // Section: Jira Links
+            //
+            // The following Markdown:
+            //     This is not aJIRA-123 issue
+            //
+            // Should be rendered as:
+            //     <p>This is not aJIRA-123 issue</p>
+
+            Console.WriteLine("Example 10\nSection Jira Links\n");
+            TestParser.TestSpec("This is not aJIRA-123 issue", "<p>This is not aJIRA-123 issue</p>", "jiralinks");
+        }
+
+        [Test]
+        public void JiraLinks_Example011()
+        {
+            // Example 11
+            // Section: Jira Links
+            //
+            // The following Markdown:
+            //     This is not 4JIRA-123 issue
+            //
+            // Should be rendered as:
+            //     <p>This is not 4JIRA-123 issue</p>
+
+            Console.WriteLine("Example 11\nSection Jira Links\n");
+            TestParser.TestSpec("This is not 4JIRA-123 issue", "<p>This is not 4JIRA-123 issue</p>", "jiralinks");
+        }
+
+        [Test]
+        public void JiraLinks_Example012()
+        {
+            // Example 12
+            // Section: Jira Links
+            //
+            // The following Markdown:
+            //     This is not JIRA-123a issue
+            //
+            // Should be rendered as:
+            //     <p>This is not JIRA-123a issue</p>
+
+            Console.WriteLine("Example 12\nSection Jira Links\n");
+            TestParser.TestSpec("This is not JIRA-123a issue", "<p>This is not JIRA-123a issue</p>", "jiralinks");
+        }
+
+        [Test]
+        public void JiraLinks_Example013()
+        {
+            // Example 13
+            // Section: Jira Links
+            //
+            // The following Markdown:
             //     This is not JIRA- issue
             //
             // Should be rendered as:
             //     <p>This is not JIRA- issue</p>
 
-            Console.WriteLine("Example 9\nSection Jira Links\n");
+            Console.WriteLine("Example 13\nSection Jira Links\n");
             TestParser.TestSpec("This is not JIRA- issue", "<p>This is not JIRA- issue</p>", "jiralinks");
         }
+
+        [Test]
+        public void JiraLinks_Example014()
+        {
+            // Example 14
+            // Section: Jira Links
+            //
+            // The following Markdown:
+            //     This is not JIR4- issue
+            //
+            // Should be rendered as:
+            //     <p>This is not JIR4- issue</p>
+
+            Console.WriteLine("Example 14\nSection Jira Links\n");
+            TestParser.TestSpec("This is not JIR4- issue", "<p>This is not JIR4- issue</p>", "jiralinks");
+        }
     }
 }

src/Markdig.Tests/Specs/JiraLinks.md

@@ -10,7 +10,7 @@ var pipeline = new MarkdownPipelineBuilder()
 
 The rules for detecting a link are:
 
-- The project key must be composed of one or more capitalized ASCII letter `[A-Z]+`
+- The project key must be composed of one or more capitalized ASCII letters or digits `[A-Z,0-9]+`
 - A single hyphen `-` must separate the project key and issue number.
 - The issue number is composed of 1 or more digits `[0, 9]+`
 - The reference must be preceded by either `(` or whitespace or EOF.
@@ -24,6 +24,18 @@ This is a ABCD-123 issue
 <p>This is a <a href="http://your.company.abc/browse/ABCD-123" target="blank">ABCD-123</a> issue</p>
 ````````````````````````````````
 
+```````````````````````````````` example
+This is a ABC4-123 issue
+.
+<p>This is a <a href="http://your.company.abc/browse/ABC4-123" target="blank">ABC4-123</a> issue</p>
+````````````````````````````````
+
+```````````````````````````````` example
+This is a ABC45-123 issue
+.
+<p>This is a <a href="http://your.company.abc/browse/ABC45-123" target="blank">ABC45-123</a> issue</p>
+````````````````````````````````
+
 ```````````````````````````````` example
 This is a KIRA-1 issue
 .
@@ -44,6 +56,12 @@ This is a (ABCD-123) issue
 <p>This is a (<a href="http://your.company.abc/browse/ABCD-123" target="blank">ABCD-123</a>) issue</p>
 ````````````````````````````````
 
+```````````````````````````````` example
+This is a (ABC4-123) issue
+.
+<p>This is a (<a href="http://your.company.abc/browse/ABC4-123" target="blank">ABC4-123</a>) issue</p>
+````````````````````````````````
+
 ```````````````````````````````` example
 This is a (KIRA-1) issue
 .
@@ -64,6 +82,12 @@ This is not aJIRA-123 issue
 <p>This is not aJIRA-123 issue</p>
 ````````````````````````````````
 
+```````````````````````````````` example
+This is not 4JIRA-123 issue
+.
+<p>This is not 4JIRA-123 issue</p>
+````````````````````````````````
+
 ```````````````````````````````` example
 This is not JIRA-123a issue
 .
@@ -75,3 +99,9 @@ This is not JIRA- issue
 .
 <p>This is not JIRA- issue</p>
 ````````````````````````````````
+
+```````````````````````````````` example
+This is not JIR4- issue
+.
+<p>This is not JIR4- issue</p>
+````````````````````````````````

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //            List Extras

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //               Math

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

@@ -1,4 +1,3 @@
-// Generated: 2020-05-12 19:59:34
 
 // --------------------------------
 //               Media

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //              No Html

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

@@ -1,4 +1,3 @@
-// Generated: 2020-07-30 15:47:38
 
 // --------------------------------
 //          GFM Pipe Tables

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

@@ -1,4 +1,3 @@
-// Generated: 2020-07-30 15:32:13
 
 // --------------------------------
 //            Pipe Tables

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

@@ -1,4 +1,3 @@
-// Generated: 2019-08-01 12:33:23
 
 // --------------------------------
 //           Smarty Pants

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //            Task Lists

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

@@ -1,4 +1,3 @@
-// Generated: 2019-04-05 16:06:14
 
 // --------------------------------
 //               Yaml

src/Markdig.Tests/TestContainerBlocks.cs

@@ -47,12 +47,14 @@ namespace Markdig.Tests
             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);
@@ -60,11 +62,31 @@ namespace Markdig.Tests
             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
+        }
     }
 }

src/Markdig.Tests/TestContainerInlines.cs

@@ -0,0 +1,41 @@
+using System;
+using Markdig.Syntax;
+using Markdig.Syntax.Inlines;
+using NUnit.Framework;
+
+namespace Markdig.Tests
+{
+    public class TestContainerInlines
+    {
+        private class MockLeafBlock : LeafBlock
+        {
+            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);
+        }
+    }
+}

src/Markdig.Tests/TestDescendantsOrder.cs

@@ -10,10 +10,9 @@ namespace Markdig.Tests
     [TestFixture]
     public class TestDescendantsOrder
     {
-        [Test]
-        public void TestSchemas()
+        public static void TestSchemas(MarkdownDocument[] specsSyntaxTrees)
         {
-            foreach (var syntaxTree in TestParser.SpecsSyntaxTrees)
+            foreach (var syntaxTree in specsSyntaxTrees)
             {
                 AssertIEnumerablesAreEqual(
                     Descendants_Legacy(syntaxTree),

src/Markdig.Tests/TestEmphasisExtended.cs

@@ -124,6 +124,7 @@ namespace Markdig.Tests
         [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>")]

src/Markdig.Tests/TestHtmlAttributes.cs

@@ -1,4 +1,4 @@
-// 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.
 

src/Markdig.Tests/TestHtmlHelper.cs

@@ -14,7 +14,7 @@ namespace Markdig.Tests
         {
             var inputTag = "<a>";
             var text = new StringSlice(inputTag);
-            Assert.True(HtmlHelper.TryParseHtmlTag(text, out string outputTag));
+            Assert.True(HtmlHelper.TryParseHtmlTag(ref text, out string outputTag));
             Assert.AreEqual(inputTag, outputTag);
         }
 
@@ -23,7 +23,7 @@ namespace Markdig.Tests
         {
             var inputTag = "<a href='http://google.com'>";
             var text = new StringSlice(inputTag);
-            Assert.True(HtmlHelper.TryParseHtmlTag(text, out string outputTag));
+            Assert.True(HtmlHelper.TryParseHtmlTag(ref text, out string outputTag));
             Assert.AreEqual(inputTag, outputTag);
         }
     }

src/Markdig.Tests/TestLinkHelper.cs

@@ -15,7 +15,7 @@ namespace Markdig.Tests
         public void TestUrlSimple()
         {
             var text = new StringSlice("toto tutu");
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link));
+            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
             Assert.AreEqual("toto", link);
             Assert.AreEqual(' ', text.CurrentChar);
         }
@@ -24,7 +24,7 @@ namespace Markdig.Tests
         public void TestUrlUrl()
         {
             var text = new StringSlice("http://google.com)");
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link));
+            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
             Assert.AreEqual("http://google.com", link);
             Assert.AreEqual(')', text.CurrentChar);
         }
@@ -35,7 +35,7 @@ namespace Markdig.Tests
         public void TestUrlTrailingFullStop(string uri)
         {
             var text = new StringSlice(uri);
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, true));
+            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _, true));
             Assert.AreEqual("http://google.com", link);
             Assert.AreEqual('.', text.CurrentChar);
         }
@@ -44,7 +44,7 @@ namespace Markdig.Tests
         public void TestUrlNestedParenthesis()
         {
             var text = new StringSlice("(toto)tutu(tata) nooo");
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link));
+            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
             Assert.AreEqual("(toto)tutu(tata)", link);
             Assert.AreEqual(' ', text.CurrentChar);
         }
@@ -53,7 +53,7 @@ namespace Markdig.Tests
         public void TestUrlAlternate()
         {
             var text = new StringSlice("<toto_tata_tutu> nooo");
-            Assert.True(LinkHelper.TryParseUrl(ref text, out string link));
+            Assert.True(LinkHelper.TryParseUrl(ref text, out string link, out _));
             Assert.AreEqual("toto_tata_tutu", link);
             Assert.AreEqual(' ', text.CurrentChar);
         }
@@ -62,14 +62,14 @@ namespace Markdig.Tests
         public void TestUrlAlternateInvalid()
         {
             var text = new StringSlice("<toto_tata_tutu");
-            Assert.False(LinkHelper.TryParseUrl(ref text, out string link));
+            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));
+            Assert.True(LinkHelper.TryParseTitle(ref text, out string title, out _));
             Assert.AreEqual(@"tata\tutu'", title);
         }
 
@@ -77,7 +77,7 @@ namespace Markdig.Tests
         public void TestTitleSimpleAlternate()
         {
             var text = new StringSlice(@"""tata\tutu\"""" ");
-            Assert.True(LinkHelper.TryParseTitle(ref text, out string title));
+            Assert.True(LinkHelper.TryParseTitle(ref text, out string title, out _));
             Assert.AreEqual(@"tata\tutu""", title);
             Assert.AreEqual(' ', text.CurrentChar);
         }

src/Markdig.Tests/TestMarkdigCoreApi.cs

@@ -11,11 +11,14 @@ namespace Markdig.Tests
         [Test]
         public void TestToHtml()
         {
-            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);
+            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);
 
-            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]
@@ -24,49 +27,66 @@ namespace Markdig.Tests
             var pipeline = new MarkdownPipelineBuilder()
                 .Build();
 
-            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);
+            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);
+                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();
 
-            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 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);
+            }
         }
 
         [Test]
         public void TestToHtmlWithWriter()
         {
-            StringWriter writer = new StringWriter();
+            var writer = new StringWriter();
 
-            _ = 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);
+            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();
 
-            _ = Markdown.ToHtml("This is a text with a https://link.tld/", writer, pipeline);
-            html = writer.ToString();
-            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 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 TestConvert()
         {
-            StringWriter writer = new StringWriter();
-            HtmlRenderer renderer = new HtmlRenderer(writer);
+            var writer = new StringWriter();
+            var renderer = new HtmlRenderer(writer);
 
-            _ = 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);
+            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);
@@ -74,9 +94,13 @@ namespace Markdig.Tests
                 .UseAdvancedExtensions()
                 .Build();
 
-            _ = Markdown.Convert("This is a text with a https://link.tld/", renderer, pipeline);
-            html = writer.ToString();
-            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.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]
@@ -88,62 +112,77 @@ namespace Markdig.Tests
                 .UsePreciseSourceLocation()
                 .Build();
 
-            MarkdownDocument document = Markdown.Parse(markdown, pipeline);
+            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.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);
+                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()
         {
-            string normalized = Markdown.Normalize("Heading\n=======");
-            Assert.AreEqual("# Heading", normalized);
+            for (int i = 0; i < 5; i++)
+            {
+                string normalized = Markdown.Normalize("Heading\n=======");
+                Assert.AreEqual("# Heading", normalized);
+            }
         }
 
         [Test]
         public void TestNormalizeWithWriter()
         {
-            StringWriter writer = new StringWriter();
+            for (int i = 0; i < 5; i++)
+            {
+                var writer = new StringWriter();
 
-            _ = Markdown.Normalize("Heading\n=======", writer);
-            string normalized = writer.ToString();
-            Assert.AreEqual("# Heading", normalized);
+                _ = Markdown.Normalize("Heading\n=======", writer);
+                string normalized = writer.ToString();
+                Assert.AreEqual("# Heading", normalized);
+            }
         }
 
         [Test]
         public void TestToPlainText()
         {
-            string plainText = Markdown.ToPlainText("*Hello*, [world](http://example.com)!");
-            Assert.AreEqual("Hello, world!\n", plainText);
+            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()
         {
-            StringWriter writer = new StringWriter();
+            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/TestNewLine.cs

@@ -0,0 +1,17 @@
+using NUnit.Framework;
+
+namespace Markdig.Tests
+{
+    [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")]
+        public void Test(string value, string expectedHtml)
+        {
+            Assert.AreEqual(expectedHtml, Markdown.ToHtml(value));
+            Assert.AreEqual(expectedHtml, Markdown.ToHtml(value.Replace("\n", "\r\n")));
+        }
+    }
+}

src/Markdig.Tests/TestNormalize.cs

@@ -21,7 +21,8 @@ namespace Markdig.Tests
             AssertSyntax("````csharp\npublic void HelloWorld()\n{\n}\n````", new FencedCodeBlock(null)
             {
                 FencedChar = '`',
-                FencedCharCount = 4,
+                OpeningFencedCharCount = 4,
+                ClosingFencedCharCount = 4,
                 Info = "csharp",
                 Lines = new StringLineGroup(4)
                 {

src/Markdig.Tests/TestParser.cs

@@ -22,7 +22,27 @@ namespace Markdig.Tests
             if (IsContinuousIntegration)
                 return;
 
-            foreach (var specFilePath in SpecsFilePaths)
+            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");
 
@@ -43,6 +63,8 @@ namespace Markdig.Tests
                     $"{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);
         }
 
         public static void TestSpec(string inputText, string expectedOutputText, string extensions = null, bool plainText = false)
@@ -141,21 +163,7 @@ namespace Markdig.Tests
 
         public static readonly bool IsContinuousIntegration = Environment.GetEnvironmentVariable("CI") != null;
 
-        public static readonly string TestsDirectory =
-            Path.GetFullPath(Path.Combine(Path.GetDirectoryName(typeof(TestParser).Assembly.Location), "../../.."));
-
-        /// <summary>
-        /// Contains absolute paths to specification markdown files (order is the same as in <see cref="SpecsMarkdown"/>)
-        /// </summary>
-        public static readonly string[] SpecsFilePaths;
-        /// <summary>
-        /// Contains the markdown source for specification files (order is the same as in <see cref="SpecsFilePaths"/>)
-        /// </summary>
-        public static readonly string[] SpecsMarkdown;
-        /// <summary>
-        /// Contains the markdown syntax tree for specification files (order is the same as in <see cref="SpecsFilePaths"/>)
-        /// </summary>
-        public static readonly MarkdownDocument[] SpecsSyntaxTrees;
+        public static readonly string TestsDirectory = Path.GetFullPath(Path.Combine(Path.GetDirectoryName(typeof(TestParser).Assembly.Location), "../../.."));
 
         static TestParser()
         {
@@ -165,26 +173,6 @@ namespace Markdig.Tests
             {
                 TestsDirectory = TestsDirectory.Substring(0, index) + "\\src\\Markdig.Tests";
             }
-
-            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();
-
-            SpecsMarkdown = new string[SpecsFilePaths.Length];
-            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);
-            }
         }
     }
 }

src/Markdig.Tests/TestPipeTable.cs

@@ -0,0 +1,26 @@
+using Markdig.Extensions.Tables;
+using Markdig.Syntax;
+using NUnit.Framework;
+using System.Linq;
+
+namespace Markdig.Tests
+{
+    [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|---|---|\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());
+
+            Table[] tables = document.Descendants().OfType<Table>().ToArray();
+
+            Assert.AreEqual(tableCount, tables.Length);
+        }
+    }
+}

src/Markdig.Tests/TestPlainText.cs

@@ -21,6 +21,7 @@ namespace Markdig.Tests
         [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);

src/Markdig.Tests/TestPlayParser.cs

@@ -12,6 +12,16 @@ namespace Markdig.Tests
     [TestFixture]
     public class TestPlayParser
     {
+        [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 TestLink()
         {

src/Markdig.Tests/TestReferralLinks.cs

@@ -37,20 +37,6 @@ namespace Markdig.Tests
             Assert.That(html, Contains.Substring($"rel=\"{expected}\""));
         }
 
-
-        [Test]
-        public void TestLinksWithNullRel()
-        {
-            var markdown = "[world](http://example.com)";
-
-            var pipeline = new MarkdownPipelineBuilder()
-                .UseReferralLinks(null)
-                .Build();
-            var html = Markdown.ToHtml(markdown, pipeline);
-
-            Assert.That(html, !Contains.Substring("rel="));
-        }
-
         [Test]
         [TestCase(new[] { "noopener" }, "noopener")]
         [TestCase(new[] { "nofollow" }, "nofollow")]

src/Markdig.Tests/TestRoundtrip.cs

@@ -0,0 +1,30 @@
+using Markdig.Renderers.Roundtrip;
+using Markdig.Syntax;
+using NUnit.Framework;
+using System.IO;
+
+namespace Markdig.Tests
+{
+    internal static class TestRoundtrip
+    {
+        internal static void TestSpec(string markdownText, string expected, string extensions)
+        {
+            RoundTrip(markdownText);
+        }
+
+        internal static void RoundTrip(string markdown)
+        {
+            var pipelineBuilder = new MarkdownPipelineBuilder();
+            pipelineBuilder.EnableTrackTrivia();
+            MarkdownPipeline pipeline = pipelineBuilder.Build();
+            MarkdownDocument markdownDocument = Markdown.Parse(markdown, pipeline);
+            var sw = new StringWriter();
+            var nr = new RoundtripRenderer(sw);
+
+            nr.Write(markdownDocument);
+
+            var result = sw.ToString();
+            Assert.AreEqual(markdown, result);
+        }
+    }
+}

src/Markdig.Tests/TestStringSliceList.cs

@@ -16,8 +16,8 @@ namespace Markdig.Tests
         {
             var text = new StringLineGroup(4)
             {
-                new StringSlice("ABC"),
-                new StringSlice("E"),
+                new StringSlice("ABC", NewLine.LineFeed),
+                new StringSlice("E", NewLine.LineFeed),
                 new StringSlice("F")
             };
 
@@ -35,8 +35,8 @@ namespace Markdig.Tests
         {
             var text = new StringLineGroup(4)
             {
-                new StringSlice("XABC") { Start = 1},
-                new StringSlice("YYE") { Start = 2},
+                new StringSlice("XABC", NewLine.LineFeed) { Start = 1},
+                new StringSlice("YYE", NewLine.LineFeed) { Start = 2},
                 new StringSlice("ZZZF") { Start = 3 }
             };
 
@@ -61,7 +61,7 @@ namespace Markdig.Tests
         {
             var text = new StringLineGroup(4)
             {
-                new StringSlice("ABCD"),
+                new StringSlice("ABCD", NewLine.LineFeed),
                 new StringSlice("EF"),
             }.ToCharIterator();
 
@@ -99,7 +99,7 @@ namespace Markdig.Tests
         [Test]
         public void TestStringLineGroupWithModifiedStart()
         {
-            var line1 = new StringSlice("  ABC");
+            var line1 = new StringSlice("  ABC", NewLine.LineFeed);
             line1.NextChar();
             line1.NextChar();
 
@@ -115,7 +115,7 @@ namespace Markdig.Tests
         [Test]
         public void TestStringLineGroupWithTrim()
         {
-            var line1 = new StringSlice("  ABC  ");
+            var line1 = new StringSlice("  ABC  ", NewLine.LineFeed);
             line1.NextChar();
             line1.NextChar();
 
@@ -133,8 +133,8 @@ namespace Markdig.Tests
         {
             var iterator = new StringLineGroup(4)
             {
-                new StringSlice("ABC"),
-                new StringSlice("E"),
+                new StringSlice("ABC", NewLine.LineFeed),
+                new StringSlice("E", NewLine.LineFeed),
                 new StringSlice("F")
             }.ToCharIterator();
 
@@ -153,5 +153,33 @@ namespace Markdig.Tests
 
             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();
+            }
+        }
     }
 }

src/Markdig.WebApp/Markdig.WebApp.csproj

@@ -1,42 +1,22 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <PreserveCompilationContext>true</PreserveCompilationContext>
     <AssemblyName>Markdig.WebApp</AssemblyName>
     <OutputType>Exe</OutputType>
     <PackageId>Markdig.WebApp</PackageId>
-    <RuntimeFrameworkVersion>2.0.0</RuntimeFrameworkVersion>
     <ApplicationInsightsResourceId>/subscriptions/b6745039-70e7-4641-994b-5457cb220e2a/resourcegroups/Default-ApplicationInsights-EastUS/providers/microsoft.insights/components/Markdig.WebApp</ApplicationInsightsResourceId>
     <ApplicationInsightsAnnotationResourceId>/subscriptions/b6745039-70e7-4641-994b-5457cb220e2a/resourcegroups/Default-ApplicationInsights-EastUS/providers/microsoft.insights/components/Markdig.WebApp</ApplicationInsightsAnnotationResourceId>
     <IsPackable>false</IsPackable>
+    <UserSecretsId>683145f2-53a7-4938-bd96-35e60ac55d95</UserSecretsId>
   </PropertyGroup>
 
   <ItemGroup>
-    <None Update="Views">
-      <CopyToPublishDirectory>PreserveNewest</CopyToPublishDirectory>
-    </None>
+    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.16.0" />
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\Markdig\Markdig.csproj" />
   </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.12.0" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.2.0" />
-    <PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="2.2.1" />
-    <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel" Version="2.2.0" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="3.1.1" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="3.1.1" />
-    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.1.1" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="3.1.1" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.1.1" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="3.1.1" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <WCFMetadata Include="Connected Services" />
-  </ItemGroup>
-
 </Project>

src/Markdig.WebApp/Program.cs

@@ -1,6 +1,7 @@
 using System.IO;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.Hosting;
 
 namespace Markdig.WebApp
 {
@@ -8,14 +9,14 @@ namespace Markdig.WebApp
     {
         public static void Main(string[] args)
         {
-            var host = new WebHostBuilder()
-                .UseKestrel()
-                .UseContentRoot(Directory.GetCurrentDirectory())
-                .UseIISIntegration()
-                .UseStartup<Startup>()
-                .Build();
-
-            host.Run();
+            CreateHostBuilder(args).Build().Run();
         }
+
+        public static IHostBuilder CreateHostBuilder(string[] args) =>
+            Host.CreateDefaultBuilder(args)
+                .ConfigureWebHostDefaults(webBuilder =>
+                {
+                    webBuilder.UseStartup<Startup>();
+                });
     }
 }

src/Markdig.WebApp/Properties/PublishProfiles/markdig - Web Deploy-publish.ps1

@@ -1,111 +0,0 @@
-# Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
-# Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
-
-[cmdletbinding(SupportsShouldProcess=$true)]
-param($publishProperties=@{}, $packOutput, $pubProfilePath, $nugetUrl)
-
-# to learn more about this file visit https://go.microsoft.com/fwlink/?LinkId=524327
-$publishModuleVersion = '1.1.0'
-
-function Get-PublishModulePath{
-    [cmdletbinding()]
-    param()
-    process{
-        $keysToCheck = @('hklm:\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\{0}',
-                         'hklm:\SOFTWARE\Microsoft\VisualStudio\{0}',
-                         'hklm:\SOFTWARE\Wow6432Node\Microsoft\VWDExpress\{0}',
-                         'hklm:\SOFTWARE\Microsoft\VWDExpress\{0}'
-                         )
-        $versions = @('14.0', '15.0')
-
-        [string]$publishModulePath=$null
-        :outer foreach($keyToCheck in $keysToCheck){
-            foreach($version in $versions){
-                if(Test-Path ($keyToCheck -f $version) ){
-                    $vsInstallPath = (Get-itemproperty ($keyToCheck -f $version) -Name InstallDir -ErrorAction SilentlyContinue | select -ExpandProperty InstallDir -ErrorAction SilentlyContinue)
-                    
-                    if($vsInstallPath){
-                        $installedPublishModulePath = "{0}Extensions\Microsoft\Web Tools\Publish\Scripts\{1}\" -f $vsInstallPath, $publishModuleVersion
-                        if(!(Test-Path $installedPublishModulePath)){
-                            $vsInstallPath = $vsInstallPath + 'VWDExpress'
-                            $installedPublishModulePath = "{0}Extensions\Microsoft\Web Tools\Publish\Scripts\{1}\" -f  $vsInstallPath, $publishModuleVersion
-                        }
-                        if(Test-Path $installedPublishModulePath){
-                            $publishModulePath = $installedPublishModulePath
-                            break outer;
-                        }
-                    }
-                }
-            }
-        }
-
-        $publishModulePath
-    }
-}
-
-$publishModulePath = Get-PublishModulePath
-
-$defaultPublishSettings = New-Object psobject -Property @{
-    LocalInstallDir = $publishModulePath
-}
-
-function Enable-PackageDownloader{
-    [cmdletbinding()]
-    param(
-        $toolsDir = "$env:LOCALAPPDATA\Microsoft\Web Tools\Publish\package-downloader-$publishModuleVersion\",
-        $pkgDownloaderDownloadUrl = 'https://go.microsoft.com/fwlink/?LinkId=524325') # package-downloader.psm1
-    process{
-        if(get-module package-downloader){
-            remove-module package-downloader | Out-Null
-        }
-
-        if(!(get-module package-downloader)){
-            if(!(Test-Path $toolsDir)){ New-Item -Path $toolsDir -ItemType Directory -WhatIf:$false }
-
-            $expectedPath = (Join-Path ($toolsDir) 'package-downloader.psm1')
-            if(!(Test-Path $expectedPath)){
-                'Downloading [{0}] to [{1}]' -f $pkgDownloaderDownloadUrl,$expectedPath | Write-Verbose
-                (New-Object System.Net.WebClient).DownloadFile($pkgDownloaderDownloadUrl, $expectedPath)
-            }
-        
-            if(!$expectedPath){throw ('Unable to download package-downloader.psm1')}
-
-            'importing module [{0}]' -f $expectedPath | Write-Output
-            Import-Module $expectedPath -DisableNameChecking -Force
-        }
-    }
-}
-
-function Enable-PublishModule{
-    [cmdletbinding()]
-    param()
-    process{
-        if(get-module publish-module){
-            remove-module publish-module | Out-Null
-        }
-
-        if(!(get-module publish-module)){
-            $localpublishmodulepath = Join-Path $defaultPublishSettings.LocalInstallDir 'publish-module.psm1'
-            if(Test-Path $localpublishmodulepath){
-                'importing module [publish-module="{0}"] from local install dir' -f $localpublishmodulepath | Write-Verbose
-                Import-Module $localpublishmodulepath -DisableNameChecking -Force
-                $true
-            }
-        }
-    }
-}
-
-try{
-
-    if (!(Enable-PublishModule)){
-        Enable-PackageDownloader
-        Enable-NuGetModule -name 'publish-module' -version $publishModuleVersion -nugetUrl $nugetUrl
-    }
-
-    'Calling Publish-AspNet' | Write-Verbose
-    # call Publish-AspNet to perform the publish operation
-    Publish-AspNet -publishProperties $publishProperties -packOutput $packOutput -pubProfilePath $pubProfilePath
-}
-catch{
-    "An error occurred during publish.`n{0}" -f $_.Exception.Message | Write-Error
-}

src/Markdig.WebApp/Properties/launchSettings.json

@@ -1,28 +1,9 @@
 {
-  "iisSettings": {
-    "windowsAuthentication": false,
-    "anonymousAuthentication": true,
-    "iisExpress": {
-      "applicationUrl": "http://localhost:65396/",
-      "sslPort": 0
-    }
-  },
   "profiles": {
-    "IIS Express": {
-      "commandName": "IISExpress",
-      "launchBrowser": true,
-      "launchUrl": "api/values",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    },
     "Markdig.WebApp": {
       "commandName": "Project",
       "launchBrowser": true,
-      "launchUrl": "http://localhost:5000/api/to_html?text=yes",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
+      "launchUrl": "api/to_html?text=test"
     }
   }
 }

src/Markdig.WebApp/Startup.cs

@@ -30,19 +30,30 @@ namespace Markdig.WebApp
         // 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);
-
-            services.AddMvc();
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline
         public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
         {
-            //loggerFactory.AddConsole(Configuration.GetSection("Logging"));
-            //loggerFactory.AddDebug();
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
 
-            app.UseMvc();
+            app.UseHttpsRedirection();
+
+            app.UseRouting();
+
+            app.UseAuthorization();
+
+            app.UseEndpoints(endpoints =>
+            {
+                endpoints.MapControllers();
+            });
         }
     }
 }

src/Markdig.WebApp/appsettings.json

@@ -8,6 +8,7 @@
     }
   },
   "ApplicationInsights": {
-    "InstrumentationKey": "5d12f113-76b2-41fe-a35a-db454b104bf9"
+    "InstrumentationKey": "5d12f113-76b2-41fe-a35a-db454b104bf9",
+    "ConnectionString": "InstrumentationKey=c00ad051-d881-4dc3-b8c1-8718f1b1c0c6;IngestionEndpoint=https://westus2-0.in.applicationinsights.azure.com/"
   }
 }

src/Markdig.WebApp/web.config

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-
-  <!--
-    Configure your application settings in appsettings.json. Learn more at http://go.microsoft.com/fwlink/?LinkId=786380
-  -->
-
-  <system.webServer>
-    <handlers>
-      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/>
-    </handlers>
-    <aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false"/>
-  </system.webServer>
-</configuration>

src/Markdig/Extensions/Abbreviations/Abbreviation.cs

@@ -1,4 +1,4 @@
-// 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.
 
@@ -27,7 +27,7 @@ namespace Markdig.Extensions.Abbreviations
         /// <summary>
         /// Gets or sets the label.
         /// </summary>
-        public string Label { get; set; }
+        public string? Label { get; set; }
 
         /// <summary>
         /// The text associated to this label.

src/Markdig/Extensions/Abbreviations/AbbreviationHelper.cs

@@ -22,12 +22,12 @@ namespace Markdig.Extensions.Abbreviations
 
         public static void AddAbbreviation(this MarkdownDocument document, string label, Abbreviation abbr)
         {
-            if (document == null) ThrowHelper.ArgumentNullException(nameof(document));
-            if (label == null) ThrowHelper.ArgumentNullException_label();
-            if (abbr == null) ThrowHelper.ArgumentNullException(nameof(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 == null)
+            if (map is null)
             {
                 map = new Dictionary<string, Abbreviation>();
                 document.SetData(DocumentKey, map);
@@ -35,7 +35,7 @@ namespace Markdig.Extensions.Abbreviations
             map[label] = abbr;
         }
 
-        public static Dictionary<string, Abbreviation> GetAbbreviations(this MarkdownDocument document)
+        public static Dictionary<string, Abbreviation>? GetAbbreviations(this MarkdownDocument document)
         {
             return document.GetData(DocumentKey) as Dictionary<string, Abbreviation>;
         }

src/Markdig/Extensions/Abbreviations/AbbreviationInline.cs

@@ -1,4 +1,4 @@
-// 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.
 
@@ -14,13 +14,6 @@ namespace Markdig.Extensions.Abbreviations
     [DebuggerDisplay("{Abbreviation}")]
     public class AbbreviationInline : LeafInline
     {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="AbbreviationInline"/> class.
-        /// </summary>
-        public AbbreviationInline()
-        {
-        }
-
         /// <summary>
         /// Initializes a new instance of the <see cref="AbbreviationInline"/> class.
         /// </summary>

src/Markdig/Extensions/Abbreviations/AbbreviationParser.cs

@@ -41,7 +41,7 @@ namespace Markdig.Extensions.Abbreviations
                 return BlockState.None;
             }
 
-            if (!LinkHelper.TryParseLabel(ref slice, out string label, out SourceSpan labelSpan))
+            if (!LinkHelper.TryParseLabel(ref slice, out string? label, out SourceSpan labelSpan))
             {
                 return BlockState.None;
             }
@@ -51,7 +51,7 @@ namespace Markdig.Extensions.Abbreviations
             {
                 return BlockState.None;
             }
-            slice.NextChar();
+            slice.SkipChar();
 
             slice.Trim();
 
@@ -73,13 +73,13 @@ namespace Markdig.Extensions.Abbreviations
             return BlockState.BreakDiscard;
         }
 
-        private void DocumentOnProcessInlinesBegin(InlineProcessor inlineProcessor, Inline inline)
+        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 == null)
+            if (abbreviations is null)
             {
                 return;
             }
@@ -89,10 +89,10 @@ namespace Markdig.Extensions.Abbreviations
 
             inlineProcessor.LiteralInlineParser.PostMatch += (InlineProcessor processor, ref StringSlice slice) =>
             {
-                var literal = (LiteralInline)processor.Inline;
+                var literal = (LiteralInline)processor.Inline!;
                 var originalLiteral = literal;
 
-                ContainerInline container = null;
+                ContainerInline? container = null;
 
                 // This is slow, but we don't have much the choice
                 var content = literal.Content;
@@ -127,7 +127,7 @@ namespace Markdig.Extensions.Abbreviations
                         var indexAfterMatch = i + match.Length;
 
                         // If we don't have a container, create a new one
-                        if (container == null)
+                        if (container is null)
                         {
                             container = literal.Parent ??
                                 new ContainerInline
@@ -150,7 +150,7 @@ namespace Markdig.Extensions.Abbreviations
                         abbrInline.Span.End = abbrInline.Span.Start + match.Length - 1;
 
                         // Append the previous literal
-                        if (i > content.Start && literal.Parent == null)
+                        if (i > content.Start && literal.Parent is null)
                         {
                             container.AppendChild(literal);
                         }

src/Markdig/Extensions/AutoIdentifiers/AutoIdentifierExtension.cs

@@ -74,15 +74,14 @@ namespace Markdig.Extensions.AutoIdentifiers
 
                 var text = headingLine.ToString();
 
-                var linkRef = new HeadingLinkReferenceDefinition()
+                var linkRef = new HeadingLinkReferenceDefinition(headingBlock)
                 {
-                    Heading = headingBlock,
                     CreateLinkInline = CreateLinkInlineForHeading
                 };
 
                 var doc = processor.Document;
                 var dictionary = doc.GetData(this) as Dictionary<string, HeadingLinkReferenceDefinition>;
-                if (dictionary == null)
+                if (dictionary is null)
                 {
                     dictionary = new Dictionary<string, HeadingLinkReferenceDefinition>();
                     doc.SetData(this, dictionary);
@@ -95,11 +94,11 @@ namespace Markdig.Extensions.AutoIdentifiers
             headingBlock.ProcessInlinesEnd += HeadingBlock_ProcessInlinesEnd;
         }
 
-        private void DocumentOnProcessInlinesBegin(InlineProcessor processor, Inline inline)
+        private void DocumentOnProcessInlinesBegin(InlineProcessor processor, Inline? inline)
         {
             var doc = processor.Document;
             doc.ProcessInlinesBegin -= DocumentOnProcessInlinesBegin;
-            var dictionary = (Dictionary<string, HeadingLinkReferenceDefinition>)doc.GetData(this);
+            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
@@ -107,7 +106,7 @@ namespace Markdig.Extensions.AutoIdentifiers
                 // 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);
+                    doc.SetLinkReferenceDefinition(keyPair.Key, keyPair.Value, true);
                 }
             }
             // Once we are done, we don't need to keep the intermediate dictionary around
@@ -118,7 +117,7 @@ namespace Markdig.Extensions.AutoIdentifiers
         /// 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)
+        private Inline CreateLinkInlineForHeading(InlineProcessor inlineState, LinkReferenceDefinition linkRef, Inline? child)
         {
             var headingRef = (HeadingLinkReferenceDefinition) linkRef;
             return new LinkInline()
@@ -135,23 +134,23 @@ namespace Markdig.Extensions.AutoIdentifiers
         /// </summary>
         /// <param name="processor">The processor.</param>
         /// <param name="inline">The inline.</param>
-        private void HeadingBlock_ProcessInlinesEnd(InlineProcessor processor, Inline inline)
+        private void HeadingBlock_ProcessInlinesEnd(InlineProcessor processor, Inline? inline)
         {
             var identifiers = processor.Document.GetData(AutoIdentifierKey) as HashSet<string>;
-            if (identifiers == null)
+            if (identifiers is null)
             {
                 identifiers = new HashSet<string>();
                 processor.Document.SetData(AutoIdentifierKey, identifiers);
             }
 
-            var headingBlock = (HeadingBlock) processor.Block;
-            if (headingBlock.Inline == null)
+            var headingBlock = (HeadingBlock) processor.Block!;
+            if (headingBlock.Inline is null)
             {
                 return;
             }
 
             // If id is already set, don't try to modify it
-            var attributes = processor.Block.GetAttributes();
+            var attributes = processor.Block!.GetAttributes();
             if (attributes.Id != null)
             {
                 return;
@@ -161,7 +160,7 @@ namespace Markdig.Extensions.AutoIdentifiers
             var stripRenderer = rendererCache.Get();
 
             stripRenderer.Render(headingBlock.Inline);
-            var headingText = stripRenderer.Writer.ToString();
+            var headingText = stripRenderer.Writer.ToString()!;
             rendererCache.Release(stripRenderer);
 
             // Urilize the link

src/Markdig/Extensions/AutoIdentifiers/HeadingLinkReferenceDefinition.cs

@@ -12,6 +12,11 @@ namespace Markdig.Extensions.AutoIdentifiers
     /// <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>

src/Markdig/Extensions/AutoLinks/AutoLinkExtension.cs

@@ -17,7 +17,7 @@ namespace Markdig.Extensions.AutoLinks
     {
         public readonly AutoLinkOptions Options;
 
-        public AutoLinkExtension(AutoLinkOptions options)
+        public AutoLinkExtension(AutoLinkOptions? options)
         {
             Options = options ?? new AutoLinkOptions();
         }

src/Markdig/Extensions/AutoLinks/AutoLinkParser.cs

@@ -105,7 +105,8 @@ namespace Markdig.Extensions.AutoLinks
                         break;
                 }
 
-                if (!LinkHelper.TryParseUrl(ref slice, out string link, true))
+                // Parse URL
+                if (!LinkHelper.TryParseUrl(ref slice, out string? link, out _, true))
                 {
                     return false;
                 }
@@ -147,6 +148,12 @@ namespace Markdig.Extensions.AutoLinks
                             return false;
                         }
                         break;
+                    case 't':
+                        if (string.Equals(link, "tel", StringComparison.OrdinalIgnoreCase))
+                        {
+                            return false;
+                        }
+                        break;
                     case 'm':
                         int atIndex = link.IndexOf('@');
                         if (atIndex == -1 ||