👩🏻💻 Developer Ready: A comprehensive JavaScript testing solution. Works out of the box for most JavaScript projects.
🏃🏽 Instant Feedback: Fast, interactive watch mode only runs test files related to changed files.
📸 Snapshot Testing: Capture snapshots of large objects to simplify testing and to analyze how they change over time.
See more on jestjs.io
i'm playing around with this library here.