Jest
Delightful JavaScript Testing Framework with a focus on simplicity.
Language: JavaScriptCategory: TestingFirst released: 2014Created by: Meta (Christoph Pojer)License: MIT
Jest is a comprehensive JavaScript testing framework developed by Meta. It works out of the box with minimal configuration on most JavaScript projects. Jest includes a test runner, assertion library, mocking framework, and code coverage reporter. Its snapshot testing feature ensures UI components do not change unexpectedly, and its interactive watch mode runs only tests affected by recent changes.
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Key Features
Zero-config testing for most JS projectsSnapshot testing for UI componentsBuilt-in mocking and spy capabilitiesCode coverage reports (Istanbul)Interactive watch mode with smart test filteringParallel test execution via worker processesAssertion library included (expect)Supports TypeScript, Babel, and module mocking