From 3be446880ae6335c71ff6b112746bc587145a8e4 Mon Sep 17 00:00:00 2001
From: Malte Rosenbjerg <rosenbjerg@users.noreply.github.com>
Date: Fri, 17 Oct 2025 14:45:11 +0200
Subject: [PATCH] Only run downloader tests on windows and linux since macos CI
 runs on arm which builds are not available for

---
 .../Enums/EnumExtensions.cs                   | 13 ++++++
 FFMpegCore.Test/DownloaderTests.cs            |  5 ++-
 .../Utilities/OsSpecificTestMethod.cs         | 42 +++++++++++++++++++
 3 files changed, 58 insertions(+), 2 deletions(-)
 create mode 100644 FFMpegCore.Extensions.Downloader/Enums/EnumExtensions.cs
 create mode 100644 FFMpegCore.Test/Utilities/OsSpecificTestMethod.cs

diff --git a/FFMpegCore.Extensions.Downloader/Enums/EnumExtensions.cs b/FFMpegCore.Extensions.Downloader/Enums/EnumExtensions.cs
new file mode 100644
index 0000000..7743820
--- /dev/null
+++ b/FFMpegCore.Extensions.Downloader/Enums/EnumExtensions.cs
@@ -0,0 +1,13 @@
+namespace FFMpegCore.Extensions.Downloader.Enums;
+
+public static class EnumExtensions
+{
+    public static TEnum[] GetFlags<TEnum>(this TEnum input) where TEnum : Enum
+    {
+        return Enum.GetValues(input.GetType())
+            .Cast<Enum>()
+            .Where(input.HasFlag)
+            .Cast<TEnum>()
+            .ToArray();
+    }
+}
diff --git a/FFMpegCore.Test/DownloaderTests.cs b/FFMpegCore.Test/DownloaderTests.cs
index 165e813..7acf30a 100644
--- a/FFMpegCore.Test/DownloaderTests.cs
+++ b/FFMpegCore.Test/DownloaderTests.cs
@@ -1,12 +1,13 @@
 using FFMpegCore.Extensions.Downloader;
 using FFMpegCore.Extensions.Downloader.Enums;
+using FFMpegCore.Test.Utilities;
 
 namespace FFMpegCore.Test;
 
 [TestClass]
 public class DownloaderTests
 {
-    [TestMethod]
+    [OsSpecificTestMethod(OsPlatforms.Windows | OsPlatforms.Linux)]
     public async Task GetSpecificVersionTest()
     {
         var binaries = await FFMpegDownloader.DownloadFFMpegSuite(FFMpegVersions.V6_1);
@@ -20,7 +21,7 @@ public class DownloaderTests
         }
     }
 
-    [TestMethod]
+    [OsSpecificTestMethod(OsPlatforms.Windows | OsPlatforms.Linux)]
     public async Task GetAllLatestSuiteTest()
     {
         var binaries = await FFMpegDownloader.DownloadFFMpegSuite();
diff --git a/FFMpegCore.Test/Utilities/OsSpecificTestMethod.cs b/FFMpegCore.Test/Utilities/OsSpecificTestMethod.cs
new file mode 100644
index 0000000..b3563a9
--- /dev/null
+++ b/FFMpegCore.Test/Utilities/OsSpecificTestMethod.cs
@@ -0,0 +1,42 @@
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using FFMpegCore.Extensions.Downloader.Enums;
+
+namespace FFMpegCore.Test.Utilities;
+
+[Flags]
+internal enum OsPlatforms : ushort
+{
+    Windows,
+    Linux,
+    MacOS
+}
+
+internal class OsSpecificTestMethod : TestMethodAttribute
+{
+    private readonly IEnumerable<OSPlatform> _supportedOsPlatforms;
+
+    public OsSpecificTestMethod(OsPlatforms supportedOsPlatforms, [CallerFilePath] string callerFilePath = "",
+        [CallerLineNumber] int callerLineNumber = -1) : base(callerFilePath, callerLineNumber)
+    {
+        _supportedOsPlatforms = supportedOsPlatforms.GetFlags()
+            .Select(flag => OSPlatform.Create(flag.ToString().ToUpperInvariant()))
+            .ToArray();
+    }
+
+    public override async Task<TestResult[]> ExecuteAsync(ITestMethod testMethod)
+    {
+        if (_supportedOsPlatforms.Any(RuntimeInformation.IsOSPlatform))
+        {
+            return await base.ExecuteAsync(testMethod);
+        }
+
+        var message = $"Test only executed on specific platforms: {string.Join(", ", _supportedOsPlatforms.Select(platform => platform.ToString()))}";
+        {
+            return
+            [
+                new TestResult { Outcome = UnitTestOutcome.Inconclusive, TestFailureException = new AssertInconclusiveException(message) }
+            ];
+        }
+    }
+}