Tweak stdio test

Author: eiriktsarpalis

ModelContextProtocol.slnx

@@ -56,6 +56,7 @@
     <File Path="global.json" />
     <File Path="LICENSE" />
     <File Path="logo.png" />
+    <File Path="Makefile" />
     <File Path="nuget.config" />
     <File Path="README.MD" />
   </Folder>

tests/ModelContextProtocol.Tests/Transport/StdioClientTransportTests.cs

@@ -16,14 +16,11 @@ public async Task CreateAsync_ValidProcessInvalidServer_Throws()
         string id = Guid.NewGuid().ToString("N");
 
         StdioClientTransport transport = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ?
-            new(new() { Command = "cmd", Arguments = ["/c", id] }, LoggerFactory) :
-            new(new() { Command = "ls", Arguments = [id] }, LoggerFactory);
+            new(new() { Command = "cmd", Arguments = ["/c", $"timeout /t 2 /nobreak >nul & echo {id} >&2 & exit /b 1"] }, LoggerFactory) :
+            new(new() { Command = "sh", Arguments = ["-c", $"sleep 2s; echo {id} >&2; exit 1"] }, LoggerFactory);
 
         IOException e = await Assert.ThrowsAsync<IOException>(() => McpClient.CreateAsync(transport, loggerFactory: LoggerFactory, cancellationToken: TestContext.Current.CancellationToken));
-        if (!RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
-        {
-            Assert.Contains(id, e.ToString());
-        }
+        Assert.Contains(id, e.ToString());
     }
 
     [Fact(Skip = "Platform not supported by this test.", SkipUnless = nameof(IsStdErrCallbackSupported))]
@@ -44,8 +41,8 @@ public async Task CreateAsync_ValidProcessInvalidServer_StdErrCallbackInvoked()
         };
 
         StdioClientTransport transport = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ?
-            new(new() { Command = "cmd", Arguments = ["/c", id], StandardErrorLines = stdErrCallback }, LoggerFactory) :
-            new(new() { Command = "ls", Arguments = [id], StandardErrorLines = stdErrCallback }, LoggerFactory);
+            new(new() { Command = "cmd", Arguments = ["/c", $"timeout /t 2 /nobreak >nul & echo {id} >&2 & exit /b 1"], StandardErrorLines = stdErrCallback }, LoggerFactory) :
+            new(new() { Command = "sh", Arguments = ["-c", $"sleep 2s; echo {id} >&2; exit 1"], StandardErrorLines = stdErrCallback }, LoggerFactory);
 
         await Assert.ThrowsAsync<IOException>(() => McpClient.CreateAsync(transport, loggerFactory: LoggerFactory, cancellationToken: TestContext.Current.CancellationToken));