Frontend Testing Courses

Start with the testing fundamentals (Vitest or Jest), then move on to the React specific courses. Every lesson runs in the browser against a real test runner.

Courses

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Jest/Vitest Testing Fundamentals

Learn the basics of how to test with Jest or Vitest. This course covers the main features for writing assertions, tests, mocks, async testing, and more

All 19 lessons free
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Spread across the courses, free to run in the browser with a free account. No card needed to get started.

React Frontend Testing

Course on testing React applications, using React Testing Library (with Jest or Vitest). Covers everything you will need to know to be able to test your Frontend applications

21 lessons - 1 free
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Finding elements with React Testing Library queries

Become familiar with all the ways to find elements in your rendered components with React Testing Library. This is a more in depth look at all the getBy, findBy and queryBy functions

17 lessons
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React Testing Library DOM Matchers

Course covering all DOM matchers in React Testing Library, including .toHaveAttribute(), .toBeChecked() - learn them all to make your tests cleaner and easier to write

7 lessons
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Vitest Browser Mode

Learn everything you need to know to get up to speed with Vitest Browser Mode, to run your tests in a very realistic, fast and (optionally) visual way!

23 lessons - 1 free
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Challenge Courses

17 deliberately broken tests, split into general Vitest/Jest challenges and React Testing Library ones. Reveal a hint whenever you get stuck.

React Test Challenges 🧩

Use what you learned in the other courses and see if you can fix these broken tests in our set of tricky React testing challenges. If you get stuck you can always reveal some hints to guide you along the way.

10 challenges
Challenges

Vitest and Jest Test Challenges 🧩

Take on our challenges to fix some broken tests - testing your knowledge of how Jest or Vitest works.

7 challenges
Challenges