tdd-discipline

To enforce a test-first workflow, you require a failing unit test before implementing any production code, following a strict RED-GREEN-REFACTOR cycle to reduce defects and rework.

The RED-GREEN-REFACTOR cycle in test-driven development is a workflow where you write a failing test, implement the minimal production code to pass it, then refactor to improve structure while preserving behavior.

To start TDD for a new feature or bug fix, write a failing unit test that defines the desired behavior, then write only enough production code to make the test pass before refactoring.

Yes, test-driven development can be applied across projects and languages, guiding developers through structured cycles to ensure tests drive design decisions regardless of the specific tech stack.

You need a failing test before writing production code to ensure the test actually validates the new behavior, reducing defects and preventing rework by enforcing a strict test-first development discipline.

A strict test-driven development workflow may not suit exploratory prototyping where behavior is undefined, as it requires a clear failing test to drive design decisions before any production code implementation.