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jest21,112,02443,8645.01 kB33310 months agoMIT
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jest is a popular JavaScript testing framework that is widely used for testing JavaScript code, including React applications. It provides a simple and intuitive way to write tests, run them, and analyze the results. Jest comes with built-in functionalities such as mocking, assertion, and coverage reporting, making it a comprehensive solution for testing.

While jest is a powerful testing framework, there are other alternatives available in the JavaScript ecosystem. Here are a few alternatives:

  • ava is a test runner that focuses on simplicity and performance. It provides a minimalistic approach to testing and is known for its fast test execution.
  • jasmine is a behavior-driven development framework for testing JavaScript code. It offers a rich set of features for writing tests and assertions in a descriptive manner.
  • mocha is a flexible testing framework that supports both synchronous and asynchronous testing. It allows developers to choose their preferred assertion library and mocking framework.

For a detailed comparison of ava, jasmine, jest, and mocha, check out: Comparing ava vs jasmine vs jest vs mocha.

README for jest

Jest

🃏 Delightful JavaScript Testing

  • 👩🏻‍💻 Developer Ready: Complete and ready to set-up JavaScript testing solution. Works out of the box for any React project.

  • 🏃🏽 Instant Feedback: Failed tests run first. Fast interactive mode can switch between running all tests or only test files related to changed files.

  • 📸 Snapshot Testing: Jest can capture snapshots of React trees or other serializable values to simplify UI testing.

Read More: https://jestjs.io/