Test-Driven Development

Introduction to test-driven development (TDD)

Test-driven development (TDD) is a software development approach where tests are written before the implementation code. The development process revolves around an iterative cycle of writing a failing test, implementing the code to make the test pass, and then refactoring the code.

Some of the benefits of test-driven development are the following:

• Improved code quality: TDD encourages developers to write focused and specific tests, leading to more robust and reliable code.

• Faster feedback loop: By writing tests first, developers quickly receive feedback on their code’s correctness and can detect issues early.

• Increased test coverage: TDD promotes writing tests for all code paths, resulting in comprehensive test coverage.

• Better design and modularity: Writing tests upfront forces developers to think about the code’s design, resulting in cleaner and more modular architectures.

• Code maintainability: TDD promotes writing testable code, making it easier to maintain and refactor code over time.

The red-green-refactor cycle

The core of TDD is the red-green-refactor cycle, which involves three steps:

1. Red: Writing a failing test.

2. Green: Implementing the code to make the test pass.

3. Refactor: Refactoring the code to ...