Jest

Jest vs Cypress: unit tests vs e2e - what should you prioritize?

The question is about Jest .

Answer:

Prioritize Jest's unit tests first, then add Cypress end-to-end tests once the core logic is stable. Jest runs in Node through a simulated jsdom environment, so a suite of a few hundred unit tests often finishes in seconds. Cypress runs each test in an actual browser, which takes longer but catches things a simulated DOM cannot.

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