Jest
The long-reigning JavaScript test framework — batteries included.
Open source · MITFree#unit-testing#javascript#snapshots#mocking
What is Jest?
Jest, created at Meta and now an OpenJS project, bundles a test runner, assertions, mocking, snapshots, and coverage in one zero-config package. It remains the most widely deployed JS test framework, though new projects increasingly reach for Vitest's speed.
User reviews
User reviews are coming soon. We’re building a moderated review system so real-world experience — good and bad — can live alongside our editorial take. In the meantime, you can share feedback or flag corrections on GitHub.