When should I still use an arbitrary timeout?

Arbitrary timeouts are only appropriate when testing specific timing behaviors, such as verifying a debounce or throttle interval, and should always be documented with the reason why.

What causes flaky tests in asynchronous code?

Flaky tests are often caused by race conditions where a test assumes an operation is finished based on a fixed time delay (like sleep) rather than waiting for the actual state change.

How does condition-based waiting improve test speed?

Instead of waiting for a fixed 500ms delay, a condition-based waiter polls the state every few milliseconds and proceeds immediately once the condition is met, often saving hundreds of milliseconds per test.

Does this skill work with any testing framework?

Yes, while the core patterns use TypeScript examples, the logic of replacing timing guesses with condition polling applies to any modern testing framework like Jest, Playwright, or PyTest.

Condition-Based Test Waiting

Name: Condition-Based Test Waiting
Author: yusoofsh

byyusoofsh

0•

安全与测试

Eliminates flaky tests and race conditions by replacing arbitrary timeouts with smart condition-based polling.

This skill empowers Claude to identify and resolve flaky tests caused by timing dependencies and race conditions. By implementing a standardized 'wait-for-condition' pattern, it replaces unreliable sleep or setTimeout calls with efficient polling mechanisms that wait for actual state changes. This ensures tests run reliably across different environments—from local machines to high-latency CI pipelines—improving execution speed by avoiding unnecessary waiting and providing clearer error messaging when assertions fail.

主要功能

01Implements efficient polling mechanisms with configurable timeouts

02Reduces test execution time by eliminating fixed-duration delays

030 GitHub stars

04Identifies arbitrary sleep or setTimeout calls in test suites

05Supports complex condition waiting for events, states, and file system changes

06Provides domain-specific helpers for event-driven architecture testing

使用场景

01Debugging race conditions in asynchronous event-driven codebases

02Fixing flaky tests that pass locally but fail in CI environments

03Optimizing test suite performance by replacing fixed sleep intervals

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add yusoofsh/dotfiles condition-based-waiting

For use in Claude.ai and ChatGPT

Download Skill