How to Test React Apps
EDITOR BRIEF
The article explains a modern React testing setup: Vitest for running tests, React Testing Library for rendering and querying, user-event for interactions, Mock Service Worker for network calls, and Playwright for a few end-to-end checks. It says to test visible user behavior, not internal component state, and describes a layered approach that favors integration tests over too many small unit tests.
INSIGHTS
For learners, this shows how to write tests that match real user actions and make refactoring safer. A good next step is to try one component test with React Testing Library and user-event, then add a network mock with Mock Service Worker.
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