test-driven-development

Test-driven development prevents regressions by requiring a failing test that reproduces the bug before writing any fix code. You implement the minimal logic to pass the test, ensuring the specific behavior is verified and protected against future breaks.

The Red-Green-Refactor workflow is a TDD cycle where you write a failing test, implement minimal code to pass it, and safely refactor. This enforces test coverage and prevents over-engineering by focusing strictly on required behaviors.

Test-first development implements features by writing a failing test defining the desired behavior, coding only enough to pass, and refactoring. This ensures minimal, well-scoped implementations directly tied to feature requirements.

TDD applies to refactoring by using tests to verify behavioral changes and prevent regressions. You write failing tests to define expected behavior before modifying code, ensuring structural improvements do not alter functionality.

Test-driven development enforces minimal production code by requiring a failing test first. You write only enough implementation logic to make the test pass, which scopes features tightly and improves overall code quality.