ring:test-driven-development

Test-driven development implementation uses RED-GREEN-REFACTOR cycles by writing a failing test first, then creating minimal production code to pass, and finally refactoring. This enforces fail-first discipline to drive correct code and prevent regressions during feature work and bug fixes.

Fail-first TDD is a discipline enforcing failure tests before writing any production code. It prevents regressions by ensuring minimal, correct code is driven entirely by test requirements, integrating mandatory verification steps before completion across feature work and refactoring tasks.

You can apply test-driven development workflows across languages for feature work, bug fixes, and refactors. The discipline guides teams through RED-GREEN-REFACTOR cycles language-agnostically, provided the necessary test framework prerequisites are established in your environment.

An existing test framework is required before starting a TDD workflow. The discipline enforces strict prerequisites for test frameworks to ensure automated verification and mandatory review steps can execute before any code merging occurs.

Test-driven development integrates directly with code review and verification workflows. It requires a formal code-review step and mandatory verification before merging, ensuring safe integration of refactored code and newly implemented features driven by the fail-first testing discipline.

A strict fail-first TDD approach may be constrained when prerequisite test frameworks are absent or when environments lack automated verification capabilities. The discipline heavily enforces RED-GREEN-REFACTOR cycles, which can hinder rapid prototyping if mandatory review steps cannot be executed.