Rails 5 Test Prescriptions

What You’ve Done

Using the TDD process of “write a simple test, write simple code to make it pass, and refactor,” you started your Rails application by creating some business logic.

What has the TDD process given you? You started with a requirement and it was not immediately clear how to turn it into an algorithm. By using TDD you were able to attack the problem incrementally, choosing to start in a small, well-understood corner and move outward as your understanding of the problem improved. It allowed you to easily change the code structure as you learned more about the solution.

Most important, you wrote better code. The solution you ended up with has short, well-named methods, it has logic in its proper place, and it will be easy to adjust ...