revamped and added SC stream tests

tests/SharpCompress.Test/Streams/SharpCompressStreamFactoryAsyncTest.cs

@@ -0,0 +1,56 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using SharpCompress.IO;
+using SharpCompress.Test.Mocks;
+using Xunit;
+
+namespace SharpCompress.Test.Streams;
+
+public class SharpCompressStreamFactoryAsyncTest
+{
+    [Fact]
+    public async ValueTask Create_AsyncReadWithSeekableStream_WorksCorrectly()
+    {
+        var ms = new MemoryStream(new byte[] { 1, 2, 3, 4, 5 });
+        var stream = SharpCompressStream.Create(ms);
+        var buffer = new byte[5];
+        int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false);
+        Assert.Equal(5, bytesRead);
+        Assert.Equal(new byte[] { 1, 2, 3, 4, 5 }, buffer);
+    }
+
+    [Fact]
+    public async ValueTask Create_AsyncReadWithNonSeekableStream_BufferedCorrectly()
+    {
+        var ms = new MemoryStream(new byte[] { 1, 2, 3, 4, 5 });
+        var nonSeekableMs = new ForwardOnlyStream(ms);
+        var stream = SharpCompressStream.Create(nonSeekableMs, 128);
+        var buffer = new byte[5];
+        int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length).ConfigureAwait(false);
+        Assert.Equal(5, bytesRead);
+        Assert.Equal(new byte[] { 1, 2, 3, 4, 5 }, buffer);
+    }
+
+    [Fact]
+    public async ValueTask Create_WithBufferAsync_WorksCorrectly()
+    {
+        var ms = new MemoryStream(new byte[] { 1, 2, 3, 4, 5 });
+        var nonSeekableMs = new ForwardOnlyStream(ms);
+        var stream = SharpCompressStream.Create(nonSeekableMs, 128);
+        stream.StartRecording();
+        var buffer = new byte[4];
+        await stream.ReadAsync(buffer, 0, 4).ConfigureAwait(false);
+        Assert.Equal(4, stream.Position);
+    }
+
+    [Fact]
+    public async ValueTask Create_AsyncReadSeekable_PositionUpdatesCorrectly()
+    {
+        var ms = new MemoryStream(new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 });
+        var stream = SharpCompressStream.Create(ms);
+        var buffer = new byte[4];
+        await stream.ReadAsync(buffer, 0, 4).ConfigureAwait(false);
+        Assert.Equal(4, stream.Position);
+    }
+}