Testing & Debugging React Apps — Write Code You Can Actually Trust (opens in new tab)

Read Time: ~14 minutes | Ship with confidence — because guessing is not a strategy Prerequisites: React fundamentals, hooks, state management, Next.js basics (Parts 1–4) 📌 What You'll Learn By the end of this guide, you'll be able to: ✅ Understand the three layers of testing and what each one covers ✅ Set up Jest and React Testing Library from scratch ✅ Write unit tests for components, hooks, and utility functions ✅ Write integration tests that test real user flows ✅ Test async behaviour — AP...