Free Course Image Mastering Jest in React – The Complete Testing Series

Free online courseMastering Jest in React – The Complete Testing Series

Duration of the online course: 1 hours and 17 minutes

New

Free course on testing React with Jest. Build a movie app, write unit tests, simulate user actions, test context state, and use snapshots.

In this free course, learn about

  • Foundations and Project Setup
  • Component Unit Testing and User Interactions
  • Utilities, State, and Snapshot Testing
  • Jest Best Practices and Coverage

Course Description

Mastering Jest in React – The Complete Testing Series is a free online course in Technology and Programming that helps you build confidence in testing modern React applications using Jest. It focuses on practical, real-world workflows so you can write tests that catch regressions early, speed up development, and make refactoring safer.

You will follow a hands-on approach by creating a React movie review app and using it as a testing playground. Learn how to set up Jest correctly, write solid unit tests for UI components, and validate rendering and behavior with clear, maintainable assertions.

The course also covers how to simulate user interactions, troubleshoot and fix failing tests, and test utility functions that support your application logic. You will explore strategies for verifying global state when using React context, ensuring that shared data behaves as expected across components.

To round out your testing toolkit, you will practice snapshot testing to quickly detect UI changes and pick up practical Jest tips that improve reliability and readability. By the end, you will be prepared to add a robust testing layer to React projects and ship features with greater confidence.

Course content

  • Video class: 1. Intro to React Testing – Why Testing Matters 01m
  • Exercise: What is the primary goal of using Jest with React Testing Library in this course segment?
  • Video class: 2. Build a Movie Review App with React – Project Setup 10m
  • Exercise: Which folder/file structure was used to keep a component and its unit test together?
  • Video class: 3. Setup Jest 03m
  • Exercise: When setting up Jest in a Next.js project, which configuration ensures tests run in a browser-like environment?
  • Video class: 4. Unit Testing the MovieCard Component with Jest 11m
  • Exercise: Which file naming pattern is used so Jest recognizes a unit test file for a React component in TypeScript/TSX?
  • Video class: 5. Simulating User Interactions in React with Jest 15m
  • Exercise: How can you select the movie title heading when multiple elements share the role "heading"?
  • Video class: 6. Fixing Unit Test Bugs 04m
  • Exercise: Which change helps prevent duplicate/empty reviews when submitting the review form?
  • Video class: 7. Unit Testing Utility Functions with Jest 06m
  • Exercise: When unit testing a utility function that filters movies by rating, what is the key assertion to verify in Jest?
  • Video class: 8. Testing Global State with React's useContext Hook 08m
  • Exercise: When unit testing a custom React context hook with Jest and Testing Library, what is the main purpose of providing a wrapper to renderHook?
  • Video class: 9. Snapshot Testing in React – The Easy Way 06m
  • Exercise: What is the main purpose of a snapshot test in Jest when testing a React component?
  • Video class: 10. 5 Must-Know Jest Tips 08m
  • Exercise: How can you enforce a minimum overall test coverage in Jest across branches, functions, lines, and statements?

This free course includes:

1 hours and 17 minutes of online video course

Digital certificate of course completion (Free)

Exercises to train your knowledge

100% free, from content to certificate

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