Unit Testing React Components & Hooks 🧪 | Jest + RTL Best Practices for Beginners

Are your React components bug-free? Can you refactor with confidence?

In this video, you’ll learn how to unit test React components and custom hooks using Jest + React Testing Library – with real-world examples, clear rules, and best practices.

Whether you're a frontend dev, full-stack engineer, or just starting with testing, this video helps you:

Understand what unit testing is and what to test

Test React components using user-focused queries

Test custom hooks using renderHook and act

Avoid common anti-patterns like testing internal state

Use tools like jest.fn(), userEvent, and more

📚 React Testing Series by Coding 4 Dev
📺 Playlist: https://youtube.com/playlist?list=PLEnLIMmMxb5r3brHGiq3jLIh5kMB8Nysz
📁 GitHub (Code + Cheatsheets): https://github.com/coding4dev

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⏰ Timestamps / Chapters
0:00 Intro – Why Unit Testing matters
1:00 What is Unit Testing in React?
2:00 What to test: Components vs Hooks vs Utils
3:00 Testing a simple Counter component
4:30 Writing user-focused tests with RTL
6:00 Best practices for component testing
7:00 Testing custom hooks with renderHook
8:30 act() and state transitions in hooks
9:30 Common mistakes to avoid
10:30 Tools: jest.fn, userEvent, screen
12:00 Summary – Clean, focused unit tests

🔖 Tags/Hashtags
#ReactTesting #Jest #ReactTestingLibrary #UnitTesting #CustomHooks #TestingHooks #RTL #FrontendTesting #JavaScriptTesting #Coding4Dev

Видео Unit Testing React Components & Hooks 🧪 | Jest + RTL Best Practices for Beginners канала Coding 4 Dev