अच्छे टेस्ट लिखना — जो reliable, maintainable और valuable हों — स्थापित best practices का अनुसरण करता है। खराब टेस्ट (brittle, slow, अस्पष्ट) एक बोझ बन जाते हैं, जबकि अच्छे टेस्ट स्थायी मूल्य प्रदान करते हैं। प्रभावी testing के लिए इन practices को समझना महत्वपूर्ण है।
अच्छे टेस्ट की विशेषताएँ (FIRST)
text
FAST → run quickly (so they're run often)
INDEPENDENT/ISOLATED → don't depend on each other or order; each sets up its own state
REPEATABLE → same result every time, any environment (no flakiness)
SELF-VALIDATING → clear pass/fail (assertions, not manual inspection)
TIMELY → written with (or before) the code
मुख्य practices
text
✓ Test BEHAVIOR, not implementation → tests survive refactoring (don't test internals)
✓ ONE concept per test → focused tests; clear what failed when one breaks
✓ CLEAR NAMES — describe what's tested ("returns error when email is invalid")
✓ Arrange-Act-Assert structure → readable, organized
✓ Cover EDGE cases and error conditions (not just the happy path)
✓ Keep tests SIMPLE and readable (tests are documentation; avoid complex logic in tests)
✓ DETERMINISTIC — no reliance on time, randomness, external state, or order (avoid flaky)
✓ DRY but readable — share setup (fixtures), but keep each test clear on its own