Jest

Jest is a popular open-source testing framework for JavaScript, maintained by Facebook, designed to ensure code correctness and reliability. It provides an intuitive API for writing unit tests, integration tests, and snapshot tests. Jest's features include a zero-configuration setup, automatic test discovery, and a built-in mocking library, which simplifies the process of writing and running tests. It also offers powerful tools for coverage reporting and parallel test execution, enhancing testing efficiency. Jest's seamless integration with React, as well as its support for various JavaScript frameworks and libraries, makes it a preferred choice for frontend developers. By automating the testing process and providing instant feedback, Jest helps maintain high code quality and enables developers to catch bugs early in the development cycle.