mcp-jest

The project is a testing framework designed to execute arbitrary server commands (the MCP server under test) and connect to user-specified URLs. While this is its core purpose, it means user vigilance is required when configuring the server to be tested. The expectation evaluation logic for user-provided strings is implemented with a custom, safe parser, avoiding direct `eval()` on user input within the core framework. The use of `Function()` for expression evaluation is confined to mock server implementations and test utilities, not the main `mcp-jest` runtime logic for `expect` clauses. File system operations are localized to snapshot management. Overall, it appears well-designed for its purpose with appropriate safeguards against arbitrary code execution from test configurations themselves.