MCP Testing Frameworks
Testing MCP servers requires verifying both the logic and the protocol adherence.
Testing Layers
- Unit Tests: Testing the underlying Python functions independently of MCP.
- Integration Tests: Mocking the MCP Client to verify that tools respond correctly over the protocol.
- E2E Tests: Running the server in a real environment (e.g., Claude Desktop) and verifying behavior.
Tools
pytest: The standard for Python testing.- MCP Python SDK Test Utilities: Helper classes for simulating client interactions.
Best Practices
- Schema Validation: Verify that the generated JSON Schema matches expectations.
- Edge Cases: Test tools with empty, invalid, and large inputs.