Testing · Senior · Question 15 of 75

What is the main value of TDD at a senior level beyond “having tests”?

✓Correct answer: It drives design: small units with clear interfaces and dependencies that are easy to substitute
2It guarantees 100% coverage
3It removes the need for code review

Explanation

Hard-to-test code is often a design smell: too many responsibilities or hidden dependencies.

Further reading

Martin Fowler: Test Driven Development ↗

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