Test-Driven Development: A Practical Guide

Test First, Code Second

TDD feels slower at first but leads to better designed, more reliable code.

The TDD Cycle

1. Write a failing test
2. Write minimal code to pass
3. Refactor
4. Repeat

Benefits

• Better code design
• Living documentation
• Confidence in refactoring
• Fewer bugs in production

Common Pitfalls

Don't test implementation details. Test behavior and outcomes.

TDD is a skill that improves with practice.