Test-Driven Development (TDD) minangka praktek ing mana sampeyan nulis test sadurunge kode — ngetutake siklus sing cendhak lan mbalekake: nulis test sing gagal, nulis kode kanggo nglaloni, banjur refactor. Iku nggedhekake desain liwat test lan njamin kode iku testable lan teruji kanthi apik.
Siklus TDD: Red, Green, Refactor
1. RED → write a FAILING test for the behavior you want (it fails — the code doesn't exist yet)
2. GREEN → write the MINIMUM code to make the test PASS (just enough, don't over-build)
3. REFACTOR → improve/clean up the code (and tests) while keeping tests GREEN
→ Repeat this short cycle for each small piece of behavior.
Write test (RED) → write code (GREEN) → clean up (REFACTOR) → repeat
