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To fix bugs using test-driven development, you write a failing unit or integration test that reproduces the bug, implement the minimal code change to make it pass, then refactor and verify code quality.

The red-green-refactor cycle is a test-first workflow where you first write a failing test capturing the regression, implement the smallest code change to turn it green, and then refactor the code to verify quality.

Yes, test-first validation applies to both UI and backend fixes in JVM projects, ensuring that feature regressions and missing behaviors are verifiable through unit and integration tests before implementation.

The best way to capture a missing feature is writing a unit test that defines the expected behavior, running it to confirm it fails, and then implementing the minimal code required to make the test pass.

You need test-driven development for software testing when you require verifiable, disciplined changes for difficult bugs, ensuring that every feature regression or fix is validated through a red-green-refactor cycle rather than direct patches.

Writing a failing test first makes fixing bugs less error-prone because it captures the exact bug or missing behavior, ensuring the subsequent minimal code change is immediately verifiable and safe to refactor.