test-driven-development

Test-driven development improves software reliability by enforcing the RED-GREEN-REFACTOR cycle, requiring developers to write tests before coding to prevent introducing new errors during feature creation or bug fixes.

The RED-GREEN-REFACTOR cycle in TDD is a test-first development process where you write a failing test, write the minimum production code to pass it, and then refactor the code to ensure robust system quality.

To implement TDD for new features and refactoring, execute the test-driven development cycle on your project to ensure production code is well-tested, functioning as living documentation that shows intended code usage.

You can skip writing tests before coding for urgent bug fixes only with explicit user permission, as the TDD approach strictly requires test-first principles to maintain code reliability and system quality by default.

You should not use the test-first approach in software development when explicit permission to skip TDD is granted, otherwise it is suitable for new features, bug fixes, and refactoring to ensure thorough testing and error prevention.

Automated tests act as living documentation for code quality by explicitly demonstrating how the production code is intended to be used, ensuring that system behavior is well-tested and understood throughout the development lifecycle.