In this chapter, you learned how to use Jest, a testing engine, to write tests for applications. Afterwards, you learned how to test all the elements of Redux. Make sure to write tests for all features so that whenever you make a change, you can be sure that you do not break anything else.
In the next chapter, you are going to learn how to implement multiple pages in a Redux application—through routing. We will start by manually implementing a simple router in Redux. Then, you are going to learn how to handle more complicated routing by using existing routing libraries.
