test-driven-development

Test-driven development solves code maintainability by enforcing a disciplined approach where you write tests first, implement second, and refactor incrementally. This ensures software features satisfy predefined requirements for high reliability.

To implement a feature using test-driven development, start by writing failing tests for the desired business logic, make minimal implementation changes to pass those tests, and then refactor the code while keeping the tests green.

You should use test-driven development when building new features, implementing business logic, or creating utility functions that require high reliability. It enforces a structured workflow for incremental and maintainable software development.

Yes, test-driven development works for agile projects like user authentication modules. You write tests for registration, login, and password reset first, then implement the code to pass those tests, ensuring robust and maintainable software.

Test-driven development focuses on making minimal changes to pass tests and refactoring while maintaining test integrity. It is not suited for exploratory prototyping where requirements are undefined, as it requires predefined tests before implementation.