TESTING

Vite-native test runner. Jest-compatible API, instant HMR for tests, native ESM and TypeScript, and built-in coverage. Default for new Vite and Next.js projects.

The long-standing JavaScript test framework from Meta. Snapshots, mocks, parallelism, and the broadest plugin ecosystem in the JS testing world.

Modern browser automation from Microsoft. Auto-wait, role-based selectors, cross-browser, fast in CI.

Visual testing tool for Model Context Protocol servers. Like Postman for MCP - call tools, browse resources, and view real-time logs in a browser UI. Zero install via npx.

Step-by-step guide to building an MCP server in TypeScript - from project setup to tool definitions, resource handling, testing, and deployment.