🚦 Going to Production🧪Chapter 41TestingVitest for units. React Testing Library for behavior. Playwright for E2E. MSW for network mocking.2 lessons~0.9 hr1Vitest & React Testing LibraryUnit + component tests. Query by accessible name. 30m2Playwright E2EBrowser automation. Traces. Codegen. 25m Previous chapter🏗️ The T3 Stack — Putting It TogetherNext chapter ♿ Accessibility Deep