swift-testing

SKILL.md

This skill provides expert guidance on Swift Testing, covering the modern Swift Testing framework, test doubles (mocks, stubs, spies), fixtures, integration testing, snapshot testing, and migration from XCTest. Use this skill to help developers write reliable, maintainable tests following F.I.R.S.T. principles and Arrange-Act-Assert patterns.

When a developer needs testing guidance, follow this decision tree:

| Fast | Tests execute in milliseconds | Mock expensive operations | | Isolated | Tests don't depend on each other | Fresh instance per test | | Repeatable | Same result every time | Mock dates, network, external deps | | Self-Validating | Auto-report pass/fail | Use #expect, never rely on print() |

有關 Swift 測試最佳實踐、模式和實施的專家指導。當開發人員提及以下內容時使用：(1) Swift 測試、@Test、#expect、#require 或 @Suite，(2)“使用 Swift 測試”或“現代測試模式”，(3) 測試替身、模擬、存根、間諜或固定裝置，(4) 單元測試、集成測試或快照測試，(5) 從 XCTest 遷移到 Swift 測試，(6) TDD、Arrange-Act-Assert 或第一。第一。原則，（7）參數化測試或測試組織。 來源：bocato/swift-testing-agent-skill。

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