Replace all Mock<McpServer> usages with McpServer.Create() + TestServerTransport

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

Author: Copilot

tests/ModelContextProtocol.Tests/Configuration/McpServerBuilderExtensionsPromptsTests.cs

@@ -5,7 +5,7 @@
 using ModelContextProtocol.Client;
 using ModelContextProtocol.Protocol;
 using ModelContextProtocol.Server;
-using Moq;
+using ModelContextProtocol.Tests.Utils;
 using System.Collections;
 using System.ComponentModel;
 using System.Text.Json;
@@ -314,7 +314,7 @@ public async Task WithPrompts_TargetInstance_UsesTarget()
         sc.AddMcpServer().WithPrompts(target);
 
         McpServerPrompt prompt = sc.BuildServiceProvider().GetServices<McpServerPrompt>().First(t => t.ProtocolPrompt.Name == "returns_string");
-        var result = await prompt.GetAsync(new RequestContext<GetPromptRequestParams>(new Mock<McpServer>().Object, new JsonRpcRequest { Method = "test", Id = new RequestId("1") })
+        var result = await prompt.GetAsync(new RequestContext<GetPromptRequestParams>(McpServer.Create(new TestServerTransport(), new McpServerOptions()), new JsonRpcRequest { Method = "test", Id = new RequestId("1") })
         {
             Params = new GetPromptRequestParams
             {

tests/ModelContextProtocol.Tests/Configuration/McpServerBuilderExtensionsResourcesTests.cs

@@ -5,7 +5,7 @@
 using ModelContextProtocol.Client;
 using ModelContextProtocol.Protocol;
 using ModelContextProtocol.Server;
-using Moq;
+using ModelContextProtocol.Tests.Utils;
 using System.Collections;
 using System.ComponentModel;
 using System.Threading.Channels;
@@ -345,7 +345,7 @@ public async Task WithResources_TargetInstance_UsesTarget()
         sc.AddMcpServer().WithResources(target);
 
         McpServerResource resource = sc.BuildServiceProvider().GetServices<McpServerResource>().First(t => t.ProtocolResource?.Name == "returns_string");
-        var result = await resource.ReadAsync(new RequestContext<ReadResourceRequestParams>(new Mock<McpServer>().Object, new JsonRpcRequest { Method = "test", Id = new RequestId("1") })
+        var result = await resource.ReadAsync(new RequestContext<ReadResourceRequestParams>(McpServer.Create(new TestServerTransport(), new McpServerOptions()), new JsonRpcRequest { Method = "test", Id = new RequestId("1") })
         {
             Params = new()
             {

tests/ModelContextProtocol.Tests/Configuration/McpServerBuilderExtensionsToolsTests.cs

@@ -5,7 +5,7 @@
 using ModelContextProtocol.Client;
 using ModelContextProtocol.Protocol;
 using ModelContextProtocol.Server;
-using Moq;
+using ModelContextProtocol.Tests.Utils;
 using System.Collections;
 using System.Collections.Concurrent;
 using System.ComponentModel;
@@ -594,7 +594,7 @@ public async Task WithTools_TargetInstance_UsesTarget()
         sc.AddMcpServer().WithTools(target, BuilderToolsJsonContext.Default.Options);
 
         McpServerTool tool = sc.BuildServiceProvider().GetServices<McpServerTool>().First(t => t.ProtocolTool.Name == "get_ctor_parameter");
-        var result = await tool.InvokeAsync(new RequestContext<CallToolRequestParams>(new Mock<McpServer>().Object, new JsonRpcRequest { Method = "test", Id = new RequestId("1") }), TestContext.Current.CancellationToken);
+        var result = await tool.InvokeAsync(new RequestContext<CallToolRequestParams>(McpServer.Create(new TestServerTransport(), new McpServerOptions()), new JsonRpcRequest { Method = "test", Id = new RequestId("1") }), TestContext.Current.CancellationToken);
 
         Assert.Equal(target.GetCtorParameter(), (result.Content[0] as TextContentBlock)?.Text);
     }