In this chapter, you learned how to activate code coverage. You used the data from a measurement to improve your code. By activating the presentation of the coverage data in the editor, you figured out which lines aren't tested by the test suite.
Finally, you used fastlane to automatically create and load provisioning profiles and build and submit our app for the TestFlight review.
In the next and final chapter, we will discuss what you can do to learn more about testing and the other approaches that are included in writing tests.