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MCP Tool Unit Test Framework: Claude Code, Cursor Prompt

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MCP Tool Unit Test Framework: Claude Code, Cursor Prompt

Create a Jest-based unit test framework for MCP tools that mocks dependencies and validates input schemas

Write the Jest unit test framework for the MCP tools in [YOUR_PROJECT].

Write a shared test helper createMockTool(toolName, mockDependencies) that:
1. Imports the tool handler directly (bypassing the MCP server)
2. Inje
TLDR

Jest-based MCP tool unit test framework for Claude Code. Tests tool input schema validation, mocked dependency behavior, error handling, and structured response shapes without a running server.

How to use

  1. 1

    Start by replacing [YOUR_PROJECT] with the actual name of your project to ensure the generated unit tests are contextually relevant to your MCP tools.

  2. 2

    Add specific examples for the "Happy path" scenario to enhance test coverage and ensure your unit tests validate multiple successful input cases.

  3. 3

    Follow up by thoroughly testing the "Dependency failure" scenario to confirm that your tool handles errors appropriately, which is crucial for robust MCP tool functionality.

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Frequently asked questions

What is the MCP Tool Unit Test Framework: Claude Code, Cursor Prompt prompt used for?

Jest-based MCP tool unit test framework for Claude Code. Tests tool input schema validation, mocked dependency behavior, error handling, and structured response shapes without a running server.

How do I get the best results from this testing & debug prompt?

Paste the prompt into Claude Code, Cursor, fill in every bracketed placeholder with your specific information, then submit. The more detail you add to each placeholder, the more targeted the output. You can continue in the same conversation to refine tone, length, or focus without restarting from scratch.

Does this prompt work with Claude Code?

Yes. This prompt is optimized for Claude Code and also works well with Cursor. The structured format with a defined role and numbered steps produces consistent results across all major instruction-following models, so you can use whichever tool you prefer.

How do I access this mcp prompt?

This testing & debug prompt is available through TopFreePrompts with a Lucy+ licence. You can get access with a one-time Lucy+ purchase for $109, or a $15/month plan you can cancel anytime. Both options give access to the full library of 1,000,000+ prompts across all categories.

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