test-driven-development

Start test-driven development by writing a failing test that captures one behavior, implement the minimal code to pass it, then refactor while keeping the full test suite green.

The red-green-refactor workflow in JavaScript testing involves writing a failing test, writing minimal code to pass the test, and cleaning up the structure without altering behavior.

Yes, this test-first approach works with Pest and Vitest frameworks, applying incremental validation to enforce test-first development across PHP and JavaScript environments.

Reproduce a bug using a red-green-refactor cycle by writing a failing test that replicates the bug, implementing the minimal code fix to pass the test, and refactoring with regression guards.

Use test-first development for refactoring when you need to improve code structure and readability safely without altering behavior, using the test suite as a regression guard.