Eliminates flaky tests by replacing arbitrary timeouts with condition polling to wait for actual state changes.
This skill provides specialized guidance for debugging and fixing inconsistent test behavior caused by race conditions and timing dependencies. It introduces the core principle of waiting for actual conditions—such as events, state changes, or file existence—rather than relying on brittle timing guesses like setTimeout or sleep. By implementing standardized polling patterns with built-in timeout protections, developers can ensure their test suites pass consistently across different environments, reduce execution time by avoiding unnecessary delays, and improve the reliability of CI/CD pipelines.
主な機能
01Replaces arbitrary sleep/timeout calls with intelligent condition polling
02Standardized timeout management to prevent infinite loops in test execution
03Domain-specific helpers for complex conditions and event matching
040 GitHub stars
05Generic waitFor implementation patterns for events, states, and file system changes
06Optimization guidance for polling intervals to maintain CPU efficiency
ユースケース
01Fixing flaky tests that pass locally but fail intermittently in CI environments
02Synchronizing tests with asynchronous background operations and state machine transitions
03Stabilizing integration tests that involve file system modifications or external events
