Over the course of the preceding three chapters, we have shown you how to write E2E tests, use them to drive the development of your feature, modularize your code wherever possible, and then increase confidence in your code by covering modules with unit and integration tests.
In the next chapter, you will be tasked with implementing the rest of the features by yourself. We will outline some principles of API design that you should follow, and you can always reference our sample code bundle, but the next chapter is where you truly get to practice this process independently.
"Learning is an active process. We learn by doing. Only knowledge that is used sticks in your mind."
- Dale Carnegie, author of the book How to Win Friends and Influence People
