TDD 워크플로우

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TDD Workflow Write tests first, code second. 1. The TDD Cycle 2. The Three Laws of TDD 1. Write production code only to make a failing test pass 2. Write only enough test to demonstrate failure 3. Write only enough code to make the test pass 3. RED Phase Principles What to Write | Focus | Example | | | | | Behavior | "should add two numbers" | | Edge cases | "should handle empty input" | | Error states | "should throw for invalid data" | RED Phase Rules Test must fail first Test name describes expected behavior One assertion per test (ideally) 4. GREEN Phase Principles Minimum Code | Principle | Meaning | | | | | YAGNI | You Aren't Gonna Need It | | Simplest thing | Write the minimum to pass…