Merge pull request #110 from Cysharp/feature/ThrowUDSNotSupportedOnWindows

Throw PlatformNotSupportedException when trying to use UDS on Windows

Author: mayuki

src/YetAnotherHttpHandler/NativeHttpHandlerCore.cs

@@ -187,6 +187,10 @@ private unsafe void Initialize(YahaNativeContext* ctx, NativeClientSettings sett
             if (settings.UnixDomainSocketPath is { } unixDomainSocketPath)
             {
                 if (YahaEventSource.Log.IsEnabled()) YahaEventSource.Log.Info($"Option '{nameof(settings.UnixDomainSocketPath)}' = {unixDomainSocketPath}");
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+                {
+                    throw new PlatformNotSupportedException("Unix domain socket is not supported on Windows.");
+                }
                 var strBytes = Encoding.UTF8.GetBytes(unixDomainSocketPath);
                 fixed (byte* buffer = strBytes)
                 {

test/YetAnotherHttpHandler.Test/UdsTest.cs

@@ -40,4 +40,25 @@ protected override Task<TestWebAppServer> LaunchServerAsyncCore<T>(Action<WebApp
             configure?.Invoke(builder);
         });
     }
+}
+
+[OSSkipCondition(OperatingSystems.MacOSX | OperatingSystems.Linux)]
+public class UdsNotSupportedTest
+{
+    [ConditionalFact]
+    public async Task Throw()
+    {
+        // Arrange
+        var handler = new YetAnotherHttpHandler()
+        {
+            UnixDomainSocketPath = "/path/to/socket",
+        };
+        var httpClient = new HttpClient(handler);
+
+        // Act & Assert
+        await Assert.ThrowsAsync<PlatformNotSupportedException>(async () =>
+        {
+            await httpClient.GetAsync("http://localhost/");
+        });
+    }
 }