Jest
Jest - JavaScript Testing Framework for Delightful Testing
Jest is a zero-configuration JavaScript testing framework featuring a test runner, assertion library, mocks, and snapshot testing for unit and integration tests.
Official WebsiteCategory
Frontend
First Release
2014
License
MIT
Maintained By
Facebook (now Meta)
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Difficulty
Intermediate 2/3
Understanding test structure, mocking, asynchronous tests, and snapshot testing requires intermediate knowledge beyond basic JS testing.