Summary
In this chapter, we explored how unit testing and TDD works in Xcode. We saw real tests testing real code. Using the different test-related features of Xcode, we learned to write, run, and fix tests and to find test-relevant information. All this is important for the rest of the book. We need to know how to use Xcode when doing TDD.
In the next chapter, we will figure out the app we are going to build using test-driven development.