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What's New in Testing

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What's New in Testing 2018

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ࣗݾ঺հ ۄ৓৴ޛ iOS Engineer Appium

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Agenda 1. Code Coverage 2. Test Selection and Order 3. Parallel Testing

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Code Coverage

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Code CoverageʢXcode 9.3ʣ • ΧόϨοδදࣔ·Ͱͷ࣌ؒ୹ॖ • Xcode9ͱൺ΂95%ߴ଎Խ • ΧόϨοδϑΝΠϧͷαΠζμ΢ϯ • Xcode9ͱൺ΂1/10ҎԼ • C++ʹ͓͚ΔϔομϑΝΠϧʹهड़͞Ε࣮ͨ૷ͷΧόϨοδ ऩू͕Մೳʹ

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Code CoverageʢXcode 9.3ʣ • λʔήοτͷબ୒ • ΧόϨοδऩूͷର৅Λλʔήοτ୯ҐͰબ୒Մೳ • ex) ϥΠϒϥϦͷαϯϓϧίʔυͷΧόϨοδͷ৘ใ͸ ཉ͘͠ͳ͍

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xccov • ΧόϨοδσʔλΛѻ͏CLIπʔϧ • Coverage data • xccovreport: ֤λʔήοτɺιʔεϑΝΠϧɺ͓Αͼؔ਺ ͷΧόϨοδͷׂ߹ͳͲؚ͕·ΕΔ • xccovarchive: Ϩϙʔτ಺ͷ֤ϑΝΠϧͷੜͷ࣮ߦճ਺͕ ؚ·ΕΔ

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xccov • xccov view hoge.xccovreport Name Coverage ---------------------------------------------------------------------------------- ------------- SampleLib.framework 100.00% (3/3) /Users/you/SampleLib/Classes/SampleLib.swift 100.00% (3/3) static SampleLib.SampleLib.foo() -> Swift.String 100.00% (3/3)

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xccov • xccov view hoge.xccovreport --json | jq { "coveredLines": 3, "lineCoverage": 1, "targets": [ { "coveredLines": 3, "lineCoverage": 1, "files": [ { "coveredLines": 3, "lineCoverage": 1, "path": "/Users/you/SampleLib/Classes/SampleLib.swift", "functions": [ { "coveredLines": 3, "lineCoverage": 1, "lineNumber": 11, "executionCount": 1, "name": "static SampleLib.SampleLib.foo() -> Swift.String", "executableLines": 3 } ], "name": "SampleLib.swift", "executableLines": 3 } ], "name": "SampleLib.framework", "executableLines": 3, "buildProductPath": "/Users/you/Library/Developer/Xcode/DerivedData/.../SampleLib.framework/SampleLib" } ], "executableLines": 3 }

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Test Selection and Order

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Test Selection and Order • εΩʔϜຖʹλʔήοτͷςετΛࣗಈ௥Ճ͢Δ͔Ͳ͏͔બ ΂ΔΑ͏ʹͳͬͨ • ςετͷ࣮ߦॱΛϥϯμϜʹग़དྷΔ༷ʹͳͬͨ • ࣮ߦॱংʹґଘͨ͠ςετΛݕग़͠΍͘͢ͳΔ • ґଘΛແ͘͠setup/teardownΛ࢖ͬͯඞཁͳঢ়ଶ͸࡞Γ ·͠ΐ͏

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Parallel Testing

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!

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Parallel Testing • ͜Ε·Ͱͷฒྻςετ • ෳ਺ͷγϛϡϨʔλͰશͯͷςετΛ࣮ߦ • xcodebuild͔ΒͷΈαϙʔτ͍ͯͨ͠

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Parallel Distributed Testing • ಉҰγϛϡϨʔλͰͷςετͷฒྻ࣮ߦ͕Մೳʹͳͬͨ • Xcodeͱxcodebuildͷ྆ํͰߦ͑Δ • ςετΫϥε୯ҐͰ෼ࢄ͞ΕΔ • ςετ͸ࢦఆͨ͠γϛϡϨʔλͷΫϩʔϯ͕ඞཁͳ͚ͩىಈ ࣮͠ߦ͞ΕΔ

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Ҏ্

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͓·͚

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man xccov xccovͷ࢖͍ํΛৄࡉʹ஌Γ͍ͨ৔߹͸man xccovΛݟͨํ͕ྑ ͍ xccov help΍xccov help viewͰදࣔ͞ΕΔ৘ใ͸؆ૉʹॻ͔Ε ͍ͯΔ

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xcrunলུ͍ͨ͠ xcrunൈ͖Ͱxccovୟ͖͍ͨͳΒ /Applications/Xcode.app/Contents/Developer/usr/bin/ ʹύε௨͠·͠ΐ͏ simctlͳͲͷଞͷ։ൃऀπʔϧΛ࢖͏ͷʹ΋ศརͰ͢ɻ

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xcodebuild option ฒྻςετ༻ͷΦϓγϣϯ͕૿͑·ͨ͠ //ฒྻςετͷϫʔΧʔ਺ͷࢦఆ -parallel-testing-worker-count n //ฒྻςετͷ࣮ߦΦϓγϣϯ -parallel-testing-enabled YES | NO

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ࢀߟURL What's New in Testing https://developer.apple.com/videos/play/wwdc2018/403/ xccov: Xcode Code Coverage Report for Humans https://medium.com/xcblog/xccov-xcode-code-coverage- report-for-humans-466a4865aa18