condition-based-waiting

Replace arbitrary timeouts with condition-based polling to eliminate flaky tests. Instead of guessing delays with setTimeout, poll for actual state changes—like UI element visibility, event counts, or file availability—ensuring tests wait reliably for the condition to be met before proceeding.

Condition-based waiting polls for specific state changes rather than waiting a fixed duration. setTimeout creates race conditions under load; polling detects the actual moment a condition is satisfied, making tests consistent and eliminating intermittent failures.

Yes. Condition-based polling works for any async scenario: waiting for events, state transitions, array length changes, file availability, or complex predicates. A generic waitFor utility with customizable conditions and timeout handles diverse workflows and test contexts.

Use a generic polling loop with timeout that accepts predicates and error descriptions. Domain-specific helpers like waitForEvent, waitForEventCount, and waitForEventMatch wrap this core logic, letting you express common conditions declaratively without rebuilding polling logic.

The waitFor function returns after the timeout expires with a customizable error description. This prevents tests from hanging indefinitely while providing clear feedback about which condition failed and why, aiding diagnosis of timing or state issues.

No framework dependency is required. Condition-based waiting is a generic polling pattern applicable to any test suite or async workflow. Implement waitFor as a utility function and adapt it to your existing testing setup, whether Jest, Mocha, or custom runners.