This chapter explains the basics of testing React apps. We will give an overview of using Jest, which is a JavaScript test library developed by Facebook. We will also cover Enzyme, which is a testing utility for React, developed by Airbnb. We will look at how you can create new test suites and tests. We will also cover how to run the test and discover the results of the test.

In this chapter, we will look at the following:

• The basics of Jest
• How to create new test suites and tests
• The basics of the Enzyme test utility
• How to install Enzyme
• How to create tests with Enzyme