Testing and debugging are very important for any project that wants to have high quality. Unfortunately, many developers do not care about testing (unit tests) because they think that will reduce the speed of the development and some of them leave it until the end of the project. In my personal experience, I can say that testing from the beginning of the project will save you time because, at the end, you will have fewer bugs to fix. React uses Jest to test its components, containers, actions, and reducers.

In the following recipes, we are also going to learn how to debug our React/Redux application.