condition-based-waiting

Flaky tests caused by race conditions are fixed by replacing arbitrary setTimeout sleeps with condition-based polling using a waitFor loop. This synchronizes tests on actual state changes, bounding waits with descriptive timeouts and sensible polling intervals for deterministic outcomes.

Condition-based waiting replaces guesswork sleeps by polling for state readiness. A waitFor function checks the condition at sane intervals and fails clearly on timeout, ensuring tests synchronize on real system changes rather than fixed delays.

To eliminate arbitrary timeouts, swap fixed sleeps with targeted condition checks for event emission and I/O completion. Using domain-specific polling enforces bounded waits with descriptive error messages, preventing race conditions across parallel environments.

Real timing behavior is reserved for testing actual timing mechanics like debounce windows. When required, it demands explicit justification and comments to clarify intent, keeping the exception visible and preventing accidental flakiness from reintroduced sleeps.

Yes, condition-based waiting stabilizes parallel CI runs and background processing by polling for fresh state retrieval. It enforces bounded waits with sensible polling intervals, ensuring reliable synchronization across varied execution environments.

Async tests fail intermittently because arbitrary sleep delays do not guarantee system state changes have completed. Condition-based polling resolves this by continuously checking state readiness and failing with descriptive timeouts when conditions are not met.