Repeating

Once all the steps (with refactor being optional) are finished, we repeat them. At first glance, the whole process might seem too long or too complicated, but it is not. Experienced TDD practitioners write one to ten lines of code before switching to the next step. The whole cycle should last anything between a couple of seconds and no more than a few minutes. If it takes more than that, the scope of a test is too big and should be split into smaller chunks. Be fast, fail fast, correct, and repeat.

With this knowledge in mind, let us go through the requirements of the application we're about to develop using the Red-Green-Refactor process.