Fix SupportsMcpServer test assertions to preserve original lambda parameter names

Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>

Author: Copilot

tests/ModelContextProtocol.Tests/Server/McpServerPromptTests.cs

@@ -46,18 +46,18 @@ public void Create_InvalidArgs_Throws()
     [Fact]
     public async Task SupportsMcpServer()
     {
-        McpServer server = CreateTestServer();
+        McpServer testServer = CreateTestServer();
 
-        McpServerPrompt prompt = McpServerPrompt.Create((McpServer s) =>
+        McpServerPrompt prompt = McpServerPrompt.Create((McpServer server) =>
         {
-            Assert.Same(server, s);
+            Assert.Same(testServer, server);
             return new ChatMessage(ChatRole.User, "Hello");
         });
 
-        Assert.DoesNotContain("s", prompt.ProtocolPrompt.Arguments?.Select(a => a.Name) ?? []);
+        Assert.DoesNotContain("server", prompt.ProtocolPrompt.Arguments?.Select(a => a.Name) ?? []);
 
         var result = await prompt.GetAsync(
-            new RequestContext<GetPromptRequestParams>(server, CreateTestJsonRpcRequest()),
+            new RequestContext<GetPromptRequestParams>(testServer, CreateTestJsonRpcRequest()),
             TestContext.Current.CancellationToken);
         Assert.NotNull(result);
         Assert.NotNull(result.Messages);

tests/ModelContextProtocol.Tests/Server/McpServerToolTests.cs

@@ -54,18 +54,18 @@ public void Create_InvalidArgs_Throws()
     [Fact]
     public async Task SupportsMcpServer()
     {
-        McpServer server = CreateTestServer();
+        McpServer testServer = CreateTestServer();
 
-        McpServerTool tool = McpServerTool.Create((McpServer s) =>
+        McpServerTool tool = McpServerTool.Create((McpServer server) =>
         {
-            Assert.Same(server, s);
+            Assert.Same(testServer, server);
             return "42";
         });
 
         Assert.DoesNotContain("server", JsonSerializer.Serialize(tool.ProtocolTool.InputSchema, McpJsonUtilities.DefaultOptions));
 
         var result = await tool.InvokeAsync(
-            new RequestContext<CallToolRequestParams>(server, CreateTestJsonRpcRequest()),
+            new RequestContext<CallToolRequestParams>(testServer, CreateTestJsonRpcRequest()),
             TestContext.Current.CancellationToken);
         Assert.Equal("42", (result.Content[0] as TextContentBlock)?.Text);
     }