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rn-write-tests

• Mobile
• operative — changes the codebase
• 120 lines
• 5 references

Use to write tests for an Expo + RN app: Jest + React Native Testing Library for unit/integration (components, hooks, queries, mutations) and Maestro for end-to-end flows (sign-in, navigation, forms). Sets up the testing stack on first call (jest-expo preset, RNTL, jest config) and writes a focused test next to the source file. Triggers on: "write tests for X", "add e2e test", "mock expo-notifications", "test this hook". Not for: choosing what to test (the user decides), running the existing test suite (just npm test), or testing pure logic outside an Expo project.