Cheat Sheet: 9 React Testing Best Practices

Many developers struggle to make their tests both effective and efficient.

Solid testing is a must-have if you care about your application, customers, and business.

As a Senior Software Engineer with experience in testing and software design, I’ve read, reviewed, and written many tests.

Over the years, I’ve distilled a set of best practices that significantly improved the quality and maintainability of my tests.

In this cheat sheet, I will share 9 tips to help you write and design better tests in your React applications.

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⭐ TL;DR

1. Favor Arrange-Act-Assert (AAA) pattern
2. Avoid testing too many things at once
3. Be careful with snapshot tests
4. Test the Happy Path first
5. Test Edge Cases and Errors
6. Focus on Integration tests
7. Don’t test third-party libraries
8. Don’t focus on test coverage percentage
9. Remove unnecessary tests

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