csharp-sdk/tests/ModelContextProtocol.Tests/StdioServerIntegrationTests.cs
Copilot a83d6198a5
Centralize test timeout constants to fix CI flakiness (#1224)
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: ericstj <8918108+ericstj@users.noreply.github.com>
Co-authored-by: Eric StJohn <ericstj@microsoft.com>
2026-01-30 13:47:11 -08:00

65 lines
2.7 KiB
C#

using ModelContextProtocol.Client;
using ModelContextProtocol.Protocol;
using ModelContextProtocol.Server;
using ModelContextProtocol.Tests.Utils;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace ModelContextProtocol.Tests;
public class StdioServerIntegrationTests(ITestOutputHelper testOutputHelper) : LoggedTest(testOutputHelper)
{
public static bool CanSendSigInt { get; } = (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) && !PlatformDetection.IsMonoRuntime;
private const int SIGINT = 2;
[Fact(Skip = "Platform not supported by this test.", SkipUnless = nameof(CanSendSigInt))]
public async Task SigInt_DisposesTestServerWithHosting_Gracefully()
{
using var process = new Process
{
StartInfo = new ProcessStartInfo
{
FileName = "dotnet",
Arguments = "TestServerWithHosting.dll",
RedirectStandardInput = true,
RedirectStandardOutput = true,
UseShellExecute = false,
CreateNoWindow = true,
}
};
process.Start();
await using var streamServerTransport = new StreamServerTransport(
process.StandardOutput.BaseStream,
process.StandardInput.BaseStream,
serverName: "TestServerWithHosting");
await using var client = await McpClient.CreateAsync(
new TestClientTransport(streamServerTransport),
loggerFactory: LoggerFactory,
cancellationToken: TestContext.Current.CancellationToken);
// I considered writing a similar test for Windows using Ctrl-C, then saw that dotnet watch doesn't even send a Ctrl-C
// signal because it's such a pain without support for CREATE_NEW_PROCESS_GROUP in System.Diagnostics.Process.
// https://github.com/dotnet/sdk/blob/43b1c12e3362098a23ca1018503eb56516840b6a/src/BuiltInTools/dotnet-watch/Internal/ProcessRunner.cs#L277-L303
// https://github.com/dotnet/runtime/issues/109432, https://github.com/dotnet/runtime/issues/44944
Assert.Equal(0, kill(process.Id, SIGINT));
await process.WaitForExitAsync(TestConstants.DefaultTimeout);
Assert.True(process.HasExited);
Assert.Equal(0, process.ExitCode);
}
[DllImport("libc", SetLastError = true)]
private static extern int kill(int pid, int sig);
private sealed class TestClientTransport(ITransport sessionTransport) : IClientTransport
{
public string Name => nameof(TestClientTransport);
public Task<ITransport> ConnectAsync(CancellationToken cancellationToken = default)
=> Task.FromResult(sessionTransport);
}
}