Chapter 1: Exploring React Testing Library

React Testing Library is a modern tool for testing the UI output of React components. It abstracts a lot of boilerplate code, allowing you to write code that is easier to read, and allows you to test the code. The library encourages you to move away from testing implementation details, to avoid many false negative and false positive test cases. Instead, the library's API of tools makes it easy for you to write tests that simulate actual users' behaviors with your components, yielding confidence that the application works as expected for users. Also, because the library urges you to focus on the user when writing tests, you don't need to continuously update tests that fail when you refactor the code's implementation details. The React Testing Library allows you to write tests that fail when critical functionality unexpectedly changes, thus providing more value.

By the end of this chapter, you will understand what the...