Add first test

Jellyfin.sln

@@ -93,6 +93,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Jellyfin.MediaEncoding.Keyf
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Jellyfin.MediaEncoding.Hls", "src\Jellyfin.MediaEncoding.Hls\Jellyfin.MediaEncoding.Hls.csproj", "{DA9FD356-4894-4830-B208-D6BCE3E65B11}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Jellyfin.MediaEncoding.Hls.Tests", "tests\Jellyfin.MediaEncoding.Hls.Tests\Jellyfin.MediaEncoding.Hls.Tests.csproj", "{FE47334C-EFDE-4519-BD50-F24430FF360B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -251,6 +253,10 @@ Global
 		{DA9FD356-4894-4830-B208-D6BCE3E65B11}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{DA9FD356-4894-4830-B208-D6BCE3E65B11}.Release|Any CPU.ActiveCfg = Debug|Any CPU
 		{DA9FD356-4894-4830-B208-D6BCE3E65B11}.Release|Any CPU.Build.0 = Debug|Any CPU
+		{FE47334C-EFDE-4519-BD50-F24430FF360B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{FE47334C-EFDE-4519-BD50-F24430FF360B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{FE47334C-EFDE-4519-BD50-F24430FF360B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{FE47334C-EFDE-4519-BD50-F24430FF360B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -273,6 +279,7 @@ Global
 		{332A5C7A-F907-47CA-910E-BE6F7371B9E0} = {FBBB5129-006E-4AD7-BAD5-8B7CA1D10ED6}
 		{06535CA1-4097-4360-85EB-5FB875D53239} = {C9F0AB5D-F4D7-40C8-A353-3305C86D6D4C}
 		{DA9FD356-4894-4830-B208-D6BCE3E65B11} = {C9F0AB5D-F4D7-40C8-A353-3305C86D6D4C}
+		{FE47334C-EFDE-4519-BD50-F24430FF360B} = {FBBB5129-006E-4AD7-BAD5-8B7CA1D10ED6}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {3448830C-EBDC-426C-85CD-7BBB9651A7FE}

src/Jellyfin.MediaEncoding.Hls/Jellyfin.MediaEncoding.Hls.csproj

@@ -2,14 +2,9 @@
 
   <PropertyGroup>
     <TargetFramework>net5.0</TargetFramework>
-    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Compile Include="../../SharedVersion.cs" />
-  </ItemGroup>
-
   <!-- Code Analyzers-->
   <ItemGroup Condition=" '$(Configuration)' == 'Debug' ">
     <PackageReference Include="SerilogAnalyzer" Version="0.15.0" PrivateAssets="All" />
@@ -22,9 +17,15 @@
     <ProjectReference Include="../../MediaBrowser.Controller/MediaBrowser.Controller.csproj" />
     <ProjectReference Include="../Jellyfin.MediaEncoding.Keyframes/Jellyfin.MediaEncoding.Keyframes.csproj" />
   </ItemGroup>
-  
+
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="5.0.0" />
   </ItemGroup>
 
+  <ItemGroup>
+    <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
+      <_Parameter1>Jellyfin.MediaEncoding.Hls.Tests</_Parameter1>
+    </AssemblyAttribute>
+  </ItemGroup>
+
 </Project>

src/Jellyfin.MediaEncoding.Hls/Playlist/DynamicHlsPlaylistGenerator.cs

@@ -176,12 +176,18 @@ namespace Jellyfin.MediaEncoding.Hls.Playlist
 
         internal static bool IsExtractionAllowedForFile(ReadOnlySpan<char> filePath, string[] allowedExtensions)
         {
+            var extension = Path.GetExtension(filePath);
+            if (extension.IsEmpty)
+            {
+                return false;
+            }
+
             // Remove the leading dot
-            var extension = Path.GetExtension(filePath)[1..];
+            var extensionWithoutDot = extension[1..];
             for (var i = 0; i < allowedExtensions.Length; i++)
             {
                 var allowedExtension = allowedExtensions[i];
-                if (extension.Equals(allowedExtension, StringComparison.OrdinalIgnoreCase))
+                if (extensionWithoutDot.Equals(allowedExtension, StringComparison.OrdinalIgnoreCase))
                 {
                     return true;
                 }

tests/Jellyfin.MediaEncoding.Hls.Tests/Jellyfin.MediaEncoding.Hls.Tests.csproj

@@ -0,0 +1,32 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+    <IsPackable>false</IsPackable>
+    <CodeAnalysisRuleSet>../jellyfin-tests.ruleset</CodeAnalysisRuleSet>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
+    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="coverlet.collector" Version="3.0.2">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <!-- Code Analyzers -->
+  <ItemGroup Condition=" '$(Configuration)' == 'Debug' ">
+    <PackageReference Include="SerilogAnalyzer" Version="0.15.0" PrivateAssets="All" />
+    <PackageReference Include="StyleCop.Analyzers" Version="1.1.118" PrivateAssets="All" />
+    <PackageReference Include="SmartAnalyzers.MultithreadingAnalyzer" Version="1.1.31" PrivateAssets="All" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Jellyfin.MediaEncoding.Hls\Jellyfin.MediaEncoding.Hls.csproj" />
+  </ItemGroup>
+
+</Project>

tests/Jellyfin.MediaEncoding.Hls.Tests/Playlist/DynamicHlsPlaylistGeneratorTests.cs

@@ -0,0 +1,25 @@
+using Jellyfin.MediaEncoding.Hls.Playlist;
+using Xunit;
+
+namespace Jellyfin.MediaEncoding.Hls.Tests.Playlist
+{
+    public class DynamicHlsPlaylistGeneratorTests
+    {
+        [Theory]
+        [InlineData("testfile.mkv", new string[0], false)]
+        [InlineData("testfile.flv", new[] { "mp4", "mkv", "ts" }, false)]
+        [InlineData("testfile.flv", new[] { "mp4", "mkv", "ts", "flv" }, true)]
+        [InlineData("/some/arbitrarily/long/path/testfile.mkv", new[] { "mkv" }, true)]
+        public void IsExtractionAllowedForFile_Valid_Success(string filePath, string[] allowedExtensions, bool isAllowed)
+        {
+            Assert.Equal(isAllowed, DynamicHlsPlaylistGenerator.IsExtractionAllowedForFile(filePath, allowedExtensions));
+        }
+
+        [Theory]
+        [InlineData("testfile", new[] { "mp4" })]
+        public void IsExtractionAllowedForFile_Invalid_ReturnsFalse(string filePath, string[] allowedExtensions)
+        {
+            Assert.False(DynamicHlsPlaylistGenerator.IsExtractionAllowedForFile(filePath, allowedExtensions));
+        }
+    }
+}