The Three Stages of TDD: Red, Green, and Refactor

At the heart of TDD is the red-green-refactor process—a powerful iterative cycle that guides developers in creating robust and maintainable code. In this lesson, we’ll explore the three steps of the TDD cycle: red, green, and refactor, and we’ll also learn how they contribute to the effectiveness of this development approach.

Step 1: Red (writing the test)

The first step in the TDD process is to write a failing test. This initial test describes the desired behavior of a specific feature or functionality. By writing the test before actually implementing the code, developers gain a clear understanding of the requirements and expectations.

The test is intentionally written to initially ...