In this chapter, you learned about the benefits of writing tests and running them often. We created a few tests for our classes and components and made assertions about their behavior.
We've now covered all the topics I want to share with you. Hopefully, they've given you all the tools to start creating interfaces with confidence. We've learned so much together; covering topics such as single component designs and states, how components talk to each other (through things such as context), how to structure and decorate the whole system, and even how to test it.
The React community is just beginning, and you can join it and influence it. All it will take is for you to spend a bit of time building things with React and talking to others about your experiences doing so.