Suites

Suites is a unit-testing framework for TypeScript backend systems working with dependency injection It provides a declarative, type-safe API that eliminates manual mocking and boilerplate. It provides a declarative API that automatically sets up test environments, creates type-safe mocks bound to real implementations, tracks dependency usage to prevent missing mocks, and offers an AI-ready, concise, and fail-fast format that coding agents can use to generate correct tests in a single pass. Suites is fully open-source, trusted by teams at enterprises like Monday and Lemonade, works seamlessly with NestJS, InversifyJS, Jest, Sinon, and Vitest, and with 500K weekly downloads on npm.