Most React Native teams have decent unit test coverage. Jest is baked into the default project template. React Native Testing Library (RNTL) makes component tests easy to write. Snapshot tests catch unintended UI regressions. The bottom of the testing pyramid is well-covered. The top of the pyramid is where things fall apart. Integration tests that verify how your JS code interacts with native modules? Usually mocked out entirely. E2E tests that run on real devices with OEM skins and manufacturer specific behavior? Rarely exist. And the bugs that make it to production the ones users report as "it crashed when I tried to pay" almost always live in those skipped layers. This isn't a testing tutorial with npm install instructions. The React Native docs and Jest docs do that well. This is about the two layers most RN teams underbuild, why those gaps exist, and what to do about them. The architecture that makes RN testing unique React Native isn't a web app. It's also not a fully native app.…