test-driven-development

The Red-Green-Refactor cycle is a test-driven development process where you write a failing test, implement minimal code to pass it, then refactor for clarity to ensure robust and maintainable software.

To write tests before implementation code, follow a structured test-first development approach by creating a failing test for the desired feature, then writing the minimal production code required to make that test pass.

Test-driven development works for refactoring and bug fixes by enforcing strict testing protocols, preventing regressions, and ensuring existing code quality remains reliable when modifying software.

You should use test-first development in agile software development because it prevents bugs before introduction, makes refactoring safer, and enforces rigorous testing methodologies to maintain high code quality.

You can apply TDD principles to any programming language or framework because the methodology focuses on the universal Red-Green-Refactor cycle and strict testing protocols rather than specific technical implementations.