Run integration test SSE server in process (#56)

* Run integration test SSE server in process

* Handle expected OCE disposing fixture

Author: halter73

tests/ModelContextProtocol.TestSseServer/Program.cs

@@ -6,7 +6,9 @@
 using System.Text;
 using System.Text.Json;
 
-internal class Program
+namespace ModelContextProtocol.TestSseServer;
+
+public class Program
 {
     private static ILoggerFactory CreateLoggerFactory()
     {
@@ -25,7 +27,9 @@ private static ILoggerFactory CreateLoggerFactory()
         });
     }
 
-    private static async Task Main(string[] args)
+    public static Task Main(string[] args) => MainAsync(args);
+
+    public static async Task MainAsync(string[] args, CancellationToken cancellationToken = default)
     {
         Console.WriteLine("Starting server...");
 
@@ -386,12 +390,19 @@ static CreateMessageRequestParams CreateRequestSamplingParams(string context, st
 
         Console.WriteLine("Server initialized.");
 
-        await server.StartAsync();
+        await server.StartAsync(cancellationToken);
 
         Console.WriteLine("Server started.");
 
-        // Run until process is stopped by the client (parent process)
-        await Task.Delay(Timeout.Infinite);
+        try
+        {
+            // Run until process is stopped by the client (parent process) or test
+            await Task.Delay(Timeout.Infinite, cancellationToken);
+        }
+        finally
+        {
+            await server.DisposeAsync();
+        }
     }
 
     const string MCP_TINY_IMAGE =

tests/ModelContextProtocol.Tests/ModelContextProtocol.Tests.csproj

@@ -38,12 +38,6 @@
     <Content Condition="$([MSBuild]::IsOSPlatform('Linux'))" Include="..\ModelContextProtocol.TestServer\bin\$(Configuration)\net8.0\TestServer.dll">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
-    <Content Condition="$([MSBuild]::IsOSPlatform('Windows'))" Include="..\ModelContextProtocol.TestSseServer\bin\$(Configuration)\net8.0\TestSseServer.exe">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Condition="$([MSBuild]::IsOSPlatform('Linux'))" Include="..\ModelContextProtocol.TestSseServer\bin\$(Configuration)\net8.0\TestSseServer.dll">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
   </ItemGroup>
 
 </Project>

tests/ModelContextProtocol.Tests/SseServerIntegrationTestFixture.cs

@@ -1,15 +1,14 @@
-using ModelContextProtocol.Client;
+using Microsoft.Extensions.Logging;
+using ModelContextProtocol.Client;
 using ModelContextProtocol.Configuration;
 using ModelContextProtocol.Protocol.Transport;
-using Microsoft.Extensions.Logging;
-using System.Diagnostics;
-using System.Diagnostics.CodeAnalysis;
 
 namespace ModelContextProtocol.Tests;
 
-public class SseServerIntegrationTestFixture : IDisposable
+public class SseServerIntegrationTestFixture : IAsyncDisposable
 {
-    private Process _process;
+    private readonly CancellationTokenSource _stopCts = new();
+    private readonly Task _serverTask;
 
     public ILoggerFactory LoggerFactory { get; }
     public McpClientOptions DefaultOptions { get; }
@@ -35,40 +34,20 @@ public SseServerIntegrationTestFixture()
             Location = "http://localhost:3001/sse"
         };
 
-        Start();
+        _serverTask = TestSseServer.Program.MainAsync([], _stopCts.Token);
     }
 
-    [MemberNotNull(nameof(_process))]
-    public void Start()
-    {
-        // Start the server (which is at TestSseServer.exe on windows and "dotnet TestSseServer.dll" on linux)
-        var processStartInfo = new ProcessStartInfo
-        {
-            FileName = OperatingSystem.IsWindows() ? "TestSseServer.exe" : "dotnet",
-            Arguments = "TestSseServer.dll",
-            RedirectStandardInput = true,
-            RedirectStandardOutput = true,
-            RedirectStandardError = true,
-            UseShellExecute = false,
-        };
-
-        _process = Process.Start(processStartInfo)
-            ?? throw new InvalidOperationException($"Could not start process for {processStartInfo.FileName} with '{processStartInfo.Arguments}'.");
-
-        // Wait 1 second
-        Thread.Sleep(1000);
-    }
-
-    public void Dispose()
+    public async ValueTask DisposeAsync()
     {
+        LoggerFactory.Dispose();
+        _stopCts.Cancel();
         try
         {
-            LoggerFactory?.Dispose();
+            await _serverTask.ConfigureAwait(false);
         }
-        finally
+        catch (OperationCanceledException)
         {
-            // Kill the server process
-            _process.Kill();
         }
+        _stopCts.Dispose();
     }
 }