condition-based-waiting

SKILL.md

Flaky tests often guess at timing with arbitrary delays. This creates race conditions where tests pass on fast machines but fail under load or in CI.

Core principle: Wait for the actual condition you care about, not a guess about how long it takes.

| Wait for event | waitFor(() => events.find(e => e.type === 'DONE')) | | Wait for state | waitFor(() => machine.state === 'ready') | | Wait for count | waitFor(() => items.length >= 5) | | Wait for file | waitFor(() => fs.existsSync(path)) | | Complex condition | waitFor(() => obj.ready && obj.value > 10) |

當測試具有競爭條件、時序依賴性或不一致的通過/失敗行為時使用 - 用條件輪詢替換任意超時以等待實際狀態更改，從而消除時序猜測中的不穩定測試 來源：nickcrew/claude-ctx-plugin。

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