Write and run tests across languages and frameworks. Use when setting up test suites, writing unit/integration/E2E tests, measuring coverage, mocking dependencies, or debugging test failures. Covers Node.js (Jest/Vitest), Python (pytest), Go, Rust, and Bash.
Initial release: Testing across Node.js, Python, Go, Rust, Bash - unit tests, mocking, fixtures, coverage, TDD, integration testing