mcp-csharp-test

The mcp-csharp-test skill provides a comprehensive framework for validating C# MCP servers throughout the development lifecycle. It enables developers to verify individual tool methods in isolation and perform robust integration testing of the full MCP protocol. By leveraging standard .NET testing ecosystems, this skill ensures that MCP-based agents and tools behave reliably in production environments.

• Perform granular unit testing of tool logic using frameworks like xUnit, NUnit, or MSTest, with support for Moq and FluentAssertions to handle dependency injection and edge cases.

• Execute full-stack integration tests using the MCP client SDK to validate tool discovery, listing, and invocation via standard transports including stdio and HTTP.

• Utilize advanced testing patterns like in-memory communication using the SDK's ClientServerTestBase or WebApplicationFactory for HTTP-based MCP server validation.

• Implement standardized evaluations to measure LLM performance when interacting with your tools, ensuring deterministic, read-only, and multi-step reasoning capabilities.

• Define clear CI/CD test pipelines by automating server startup and protocol handshake validation, preventing regressions in your MCP server implementations.

• Use this skill for unit testing tool methods, integration testing with in-memory MCP clients, end-to-end testing, mocking dependencies, and creating formal evaluations for tool quality.

• Ensure server projects are built successfully before initiating integration tests to avoid protocol timeouts or transport failures.

• Follow best practices for evaluation design: questions must be read-only, non-destructive, and require multi-step reasoning across your toolset for optimal verification.

• Do not use this tool for load or performance testing, debugging live server crashes, or testing non-.NET MCP server implementations.

• Integrate with mcp-csharp-debug for interactive inspection of live server traffic or mcp-csharp-create for initializing new server projects prior to writing tests.