test-driven-development

To start test-driven development, write a failing test for the desired behavior, run it to confirm failure, implement the minimal production code to pass, then refactor. This Red-Green-Refactor cycle ensures reliable code by validating behavior before implementation.

The Red-Green-Refactor cycle is a test-driven development workflow where you write a failing test, implement the smallest code to pass it, then refactor with confidence. It enforces an iron law of no production code without a failing test first to prevent unverified changes.

Yes, test-driven development applies to bug fixes and refactors by guiding teams through reproducible cycles. It provides deterministic, reusable testing patterns that ensure regressions are caught early and validates behavior with minimal, real code-driven tests.

The best way to prevent defects is enforcing a test-first workflow where a failing test guides the minimal production code implementation. This quality assurance approach provides clear guardrails and prevents unverified changes from introducing regressions.

Test-driven development requires a failing test first as an iron law guardrail to prevent unverified changes. This ensures the test actually validates the desired behavior and confirms that production code implementation is necessary and correct.

No specific testing frameworks are required. The test-driven development workflow applies deterministic, reusable testing patterns that guide teams through Red-Green-Refactor cycles using minimal, real code-driven tests to validate behavior regardless of framework.