test-driven-development

To start test-driven development, you write a failing test that defines the desired feature requirements before writing any production code. This enforces the Red-Green-Refactor cycle, ensuring your implementation strictly adheres to predefined specifications.

The Red-Green-Refactor cycle in TDD is a development loop where you first write a failing test (Red), then create the minimal production code to pass it (Green), and finally clean up the code without changing behavior (Refactor). This structured loop prevents untested code.

You find existing testing patterns by prioritizing searches across your knowledge base and the web before test creation. This pre-computation search step ensures you reuse established patterns rather than writing redundant or poorly understood tests from scratch.

You can use TDD to improve code quality during refactoring by relying on the tests written during the initial Red-Green phase. The existing test suite verifies that your structural changes and optimizations do not break the predefined feature requirements.

You should write tests before production code to prevent the creation of untested or poorly understood logic. This rigorous workflow ensures the implementation is driven directly by specific, pre-defined requirements, leading to more maintainable software.

Test-driven development fits agile workflows by facilitating structured, iterative development cycles. It ensures every new feature increment is backed by a failing test first, maintaining robust code quality throughout continuous refactoring and development sprints.