Testing React Native Apps

A solid testing strategy covers unit, integration, and E2E.

Jest — Unit tests for utils, reducers, and hooks. Mock native modules with jest.mock.

React Native Testing Library — Test components by behavior. Query by role, label, or test ID. Avoid implementation details.

Detox — E2E on simulators/emulators. Slower but catches real user flows. Run in CI for critical paths.

Coverage: Aim for high coverage on business logic. Don't chase 100% — focus on critical paths.