test-driven-development

To enforce the Red-Green-Refactor cycle, you write a failing test defining the requirement, implement minimal code to pass it, then refactor safely. This strict sequence guarantees every line of production code is verified by a failing test before implementation.

The best way to fix bugs using test-driven development is systematic debugging: reproduce the bug by writing a failing test case that captures the erroneous behavior, then apply the minimal code fix to make the test pass, preventing future regressions.

Yes, you need a terminal environment capable of executing test suites like pytest to validate code behavior. Running these tests verifies that your production code behaves correctly against the defined requirements during the Red-Green-Refactor cycle.

Yes, you can use test-driven development for refactoring existing code without regressions. By relying on previously passing tests, you can safely modify and clean up the code structure while ensuring the system's defined behavior remains intact and verified.

To implement a new feature, initiate the test-driven-development workflow by writing the first failing test case that clearly defines the expected feature requirement. Then, write the minimal production code necessary to make that failing test pass.