Test-Driven Development (TDD)

The Red-Green-Refactor cycle in test-driven development involves writing a failing test, creating minimal code to pass it, and then refactoring. This methodology enforces a disciplined process to prevent bugs and improve code quality.

To use TDD for a new feature, write a failing test for the desired functionality first, then implement the minimal production code required to make that test pass, and finally refactor the code for clarity and efficiency.

Writing tests before implementation code ensures that code is only written to pass a pre-defined, failing test. This strict adherence prevents bugs early in the development cycle, reduces debugging time, and facilitates safe refactoring.

Yes, test-driven development applies to bug fixes and refactoring scenarios by mandating that no production code is written without a failing test first. This approach catches errors early and makes subsequent refactoring safer.

Test-driven development fits agile workflows by enforcing a strict Red-Green-Refactor cycle that prevents bugs and improves code quality. It ensures every new feature and bug fix is validated by pre-defined tests.

Strictly following TDD mandates that no production code is written without a failing test first, which may initially slow down development speed. However, this constraint prevents bugs and ensures code is written to pass pre-defined tests.