tests: add integration test for audio extractor

tests/StreamShorts.Library.Tests/Data/TestData.cs

@@ -0,0 +1,24 @@
+namespace StreamShorts.Library.Tests.Data;
+
+internal static class TestData
+{
+  private const string TestVideoFile = "video.mp4";
+  private const string ExtractedAudioFile = "extracted_audio.mp3";
+
+  public static FileStream GetTestVideo()
+  {
+    var filePath = GetTestFilePath(TestVideoFile);
+    return File.OpenRead(filePath);
+  }
+
+  public static FileStream GetExtractedAudio()
+  {
+    var filePath = GetTestFilePath(ExtractedAudioFile);
+    return File.OpenRead(filePath);
+  }
+
+  private static string GetTestFilePath(string fileName)
+  {
+    return Path.Combine(Directory.GetCurrentDirectory(), "Data", "Files", fileName);
+  }
+}

tests/StreamShorts.Library.Tests/Integration/Media/Audio/AudioExtractorTests.cs

@@ -0,0 +1,27 @@
+namespace StreamShorts.Library.Tests.Integration.Media.Audio;
+
+public class AudioExtractorTests
+{
+  private readonly AudioExtractor _sut = new();
+
+  [Fact]
+  public async Task ExtractMp3FromMp4Async_WhenCalled_ItShouldExtractAudio()
+  {
+    using var testVideo = TestData.GetTestVideo();
+    using var extractedAudio = TestData.GetExtractedAudio();
+
+    var result = await _sut.ExtractMp3FromMp4Async(testVideo);
+
+    var audioBytes = await ConvertStreamToBytesAsync(extractedAudio);
+    var resultBytes = await ConvertStreamToBytesAsync(result);
+
+    resultBytes.Should().Equal(audioBytes);
+  }
+
+  private static async Task<byte[]> ConvertStreamToBytesAsync(Stream stream)
+  {
+    using var ms = new MemoryStream();
+    await stream.CopyToAsync(ms);
+    return ms.ToArray();
+  }
+}

tests/StreamShorts.Library.Tests/StreamShorts.Library.Tests.csproj

@@ -17,4 +17,10 @@
     <ProjectReference Include="..\..\src\StreamShorts.Library\StreamShorts.Library.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="Data/Files/**">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>

tests/StreamShorts.Library.Tests/Unit/Media/Audio/AudioExtractorTests.cs

@@ -37,6 +37,7 @@ public class AudioExtractorTests
   public async Task ExtractMp3FromMp4Async_WhenVideoIsNotSeekable_ItShouldThrow()
   {
     var mockStream = new Mock<Stream>();
+    mockStream.Setup(s => s.CanRead).Returns(true);
     mockStream.Setup(s => s.CanSeek).Returns(false);
 
     var action = async () => await _sut.ExtractMp3FromMp4Async(mockStream.Object);

tests/StreamShorts.Library.Tests/Usings.cs

@@ -3,3 +3,4 @@ global using AwesomeAssertions;
 global using Moq;
 
 global using StreamShorts.Library.Media.Audio;
+global using StreamShorts.Library.Tests.Data;