WACATE2019_summer_BPP - Speaker Deck

WACATE2019_summer_BPP

by Daiki Katayama

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։ൃऀ͔ΒݟΔςετ 2019/06/15~16 WACATE2019 Ն BPPηογϣϯ kariad/͔Γ͋Ͳ(@kariad_uu) 1

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ࣗݾ঺հ • kariad / @kariad_uu • ยࢁ େथ • ΦΠγοΫεɾϥɾେ஍ iOS App Developer • / / V / ςετ / ઃܭ / ྉཧ / ήʔϜ 2

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ςετͱͷؔΘΓ • ৽ଔ: SIer ͻͨ͢ΒؤுΔखಈςετɺऴΘΒͳ͍ɺؼΕͳ͍ɺਏ͍…. • ҟಈ: ΞδϟΠϧɺTDDɺςετָ͍͠ • స৬: ΞδϟΠϧɺUnitςετಋೖɺςετ΍͍͖ͬͯ • QAΤϯδχΞɺςετΤϯδχΞͱݺ͹ΕΔํͱҰॹʹ࢓ࣄΛͨ͜͠ ͱ͸ͳ͍Ͱ͢ 3

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ࠓ೔࿩͢͜ͱ • લճͷࢲͷϙδγϣϯϖʔύʔৼΓฦΓ • ։ൃऀ(ࢲ)͸͜͏͍͏෩ʹςετʹ޲͖߹ͬͯ·͢ͱ͍͏࿩  - ςετ΁ͷϞνϕʔγϣϯ  - ։ൃऀ͕ςετΛ͠ͳ͍(Ͱ͖ͳ͍)ཧ༝ 4

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஫ҙʂ • ͋͘·Ͱ΋ࢲͷओ؍Ͱ͢ɻશͯͷ։ൃऀ͕͜͏Ͱ͋Δʂͱ͍ ͏࿩Ͱ͸ͳ͍ͷͰྃ͝ঝ͍ͩ͘͞

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લճ(WACATE2018 ౙ)ͷ ࢲͷϙδγϣϯϖʔύʔ 6

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౰೔վΊͯݟͨ࣌ͷࢲͷײ૝ • ΈΜͳͱൺ΂ͯϑΥϯτ͕Ͱ͔͍ • †ͱ͔࢖ͬͯதೋප • ͳΜ͔ΤϞ͍͚ͩ • ਖ਼௚ͪΐͬͱஏ͔͔ͣͬͨ͠… 8

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ͭ·ΓԿ͕ݴ͍͔ͨͬͨͷ͔ • ։ൃऀ͔Βࢹ఺Ͱͷςετ΁ͷ૝͍  ςετ͕͋Δ͜ͱͰ৺ཧత҆શੑͷ͋Δ։ൃ͕Ͱ͖Δ  Ͱ΋΍Δ͔Βʹ͸ޮ཰తʹ΍Γ͍ͨ • ςετ͕޷͖͔ͩΒ஥ྑͯ͘͠Ͷ  ςετք۾ͷίϛϡχςΟॳࢀՃͩͬͨ 9

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• ࠓճ΋஌Γ߹͍ͱ͔΄΅͍ͳ͍ͷͰؾܰʹ࿩͔͚ͯ͘͠ ΕΔͱخ͍͠Ͱ͢ 10

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։ൃऀͷςετ΁ͷ޲͖߹͍ํ

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ςετ΁ͷϞνϕʔγϣϯ (ࢲͳΓʹ) 12

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• ࢲͨͪͷϛογϣϯ͸ϢʔβʔʹͱͬͯՁ஋͋Δ  αʔϏεΛఏڙ͢Δ͜ͱ • Ձ஋͕͋Δ = ͓٬༷(Ϣʔβʔ)͕خ͍͔͠ 13

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• Ͱ΋࠷ॳ͔Β࠷େԽ͞ΕͨՁ஋Λఏڙ͢Δͷ͸೉͍͠ • ߟ͑ͨ͜ͱ͕ਖ਼͍͠(Ձ஋͕͋Δ)ͱ͸ݶΒͳ͍  ϦʔϯɾελʔτΞοϓ 14

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ϦʔϯɾελʔτΞοϓ 15

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ϦʔϯɾελʔτΞοϓ • ݁ہͲΜͳʹ͍͍΋ͷΛߟ͑ͨͱ͜ΖͰͦΕ͸ࢥ͍ࠐΈ΍Ծ આʹ͗͢ͳ͍ • MVP(Minimum Valuable Product)Ͱݕূ͢Δ • Ծઆ → Ծઆݕূ → ֶͼ →ҙࢥܾఆͷαΠΫϧΛճ͢ 16

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࠷ۙͷτϨϯυʁ  (σʔλ෼ੳΛݩʹͨ͠։ൃ) • ԾઆΛݩʹ࣮૷ͯ͠ϦϦʔε • σʔλΛऔಘͯ͠෼ੳ • ෼ੳ݁ՌΛݩʹվળͯ͠ϦϦʔε

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• ͲͪΒ΋ͱʹ͔͘ૣ͘αΠΫϧΛճ͍ͨ͠ • ͱ͸͍͑όά͕͋Γਖ਼ৗʹ࢖͑ͳ͚Ε͹ԾઆݕূͰ͖ͳ ͍  ‎ ࠷௿ݶChecking͸ߦ͍͍ͨ 18

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• ΞδϟΠϧ։ൃऀͱͯ͠͸ૣ͘Ձ஋ͷ͋ΔαʔϏεΛఏ ڙ͢ΔͨΊʹCheckingΛ͍ͨ͠  ʢͦ΋ͦ΋඼࣭͕௿͔ͬͨΒՁ஋΋Լ͕Δ…ʣ 19

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͡Ό͋ͳΜͰChecking(ࠓճ͸Unitςετ) ΍Βͳ͍ͷʁ 20

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• ΊΜͲ͍͘͞ • ςετʹڵຯ͕ͳ͍ • ΍Γํ͕Θ͔Βͳ͍ • CheckingͷॏཁੑΛཧղ͍ͯ͠ͳ͍

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• ΊΜͲ͍͘͞ • ςετʹڵຯ͕ͳ͍ • ΍Γํ͕Θ͔Βͳ͍ • CheckingͷॏཁੑΛཧղ͍ͯ͠ͳ͍ ΋ͬͱݴ͏ͱɺ ΍Γͨͯ͘΋Ͱ͖ͳ͍

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• ΊΜͲ͍͘͞ • ςετʹڵຯ͕ͳ͍ • ΍Γํ͕Θ͔Βͳ͍ • CheckingͷॏཁੑΛཧղ͍ͯ͠ͳ͍ ΋ͬͱݴ͏ͱɺ ΍Γͨͯ͘΋Ͱ͖ͳ͍ ࢲ͕ߟ͑ΔUnitςετΛ ΍Βͳ͍ཧ༝ͷେ͖ͳҰͭ

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Unitςετ࣮ͬͯ͸ͦΜͳʹ ؆୯Ͱ͸ͳ͍ 24

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ςετΛॻ͘ͷ͕೉͍͠ཧ༝ • ςετ͕ॻ͖΍͍͢ઃܭ(Testable)ʹͳ͍ͬͯͳ͍ͱॻ͘͜ ͱ͕೉͍͠ • (ແཧ໼ཧ)ॻ͚ͯ΋ځ۶Ͱมߋʹ΋ऑ͘ͳΔ • ޙ͔Βઃܭมߋ͸ຊ౰ʹେม…(ςετ͕ͳ͍ͱঘߋ) 25

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• ଟ͘ͷ৔߹͸ઃܭʹ໰୊͕͋Δ • ΋ͪΖΜϑϩʔతͳ໰୊ͷ৔߹΋͋Δ  UnitςετΛॻ͘ϑϩʔʹͳ͍ͬͯͳ͍ɻ͕࣌ؒͳ͍ɻ 26

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ͦ΋ͦ΋ઃܭͱ͸ ”ؔ৺ͷ෼཭ʹΑͬͯ  ෳࡶͳ໰୊Λ୯७ͳ໰୊ͷ܈ͱͯ͠੾Γ෼͚Δ͜ͱ” -iOSΞϓϦઃܭύλʔϯೖ໳ P23 ΑΓ 27

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• ࠷ۙ͸υϝΠϯతʹ΋ٕज़తʹ΋ෳࡶԽ͍ͯ͠Δ • ͦͷͨΊʹઃܭΛߦ͍ෳࡶ͞ʹཱͪ޲͔͏ • ͖ͪΜͱઃܭ͞Ε͍ͯΔ = ໰୊͕୯७Խ͞Ε͍ͯΔ  ‎ Testable΁ͷୈҰา 28

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ઃܭύλʔϯ(ΞʔΩςΫνϟ) • MVC / MVP / MVVM / Clean Architecture / Flux… • ઃܭํ਑ͱͯ͠ͷϕετϓϥΫςΟεू • ͜ΕΒͷଟ͘͸Testable΋ಉ࣌ʹߟ͑ΒΕ͍ͯΔ 29

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ςετ͕ॻ͖΍͍͢ઃܭͱ͸ • ໰୊͕୯७Խ͞Ε͍ͯΔ  Ϟδϡʔϧ͝ͱʹςετ͍ͨ͠੹຿͕γϯϓϧͰ໌֬ • Ϟδϡʔϧؒͷґଘੑ͕ͳ͍  ςετ͍ͨ͠੹຿͕ଞϞδϡʔϧͷӨڹΛड͚ͳ͍ 30

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ෳࡶͳ੹຿Λ࣋ͬͨϞδϡʔϧ • xxઍߦΈ͍ͨͳΫϥε • ௕͗ͯ͢΋͸΍ԿΛ΍͍ͬͯΔͷ͔Θ͔Βͳ͍ϝιου • ΍ͨΒͱίϝϯτͰઆ໌ͯ͋͠Δ(ݸਓతҙݟ) 31

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੹຿աଟΛͲ͏ݟ෼͚Δ͔ʁ 32

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“ίʔυͷ੠Λௌ͘” 33

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• ςετ͕ॻ͖ͮΒ͍… • ॲཧ͕ෳࡶԽ͖͍ͯͯ͠Δ… • ඞͣͦ͜ʹࠟ੻͸͋Δ • ίʔυͷष͍ͱ΋ 34

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ઃܭͷݪଇ • ༗໊ͳ΋ͷͰ͸SOLIDݪଇ • ୯Ұ੹೚ݪଇɺ։์ด࠯ݪଇɺϦείϑͷஔ׵ݪଇɺΠϯ λʔϑΣʔε෼཭ͷݪଇɺґଘؔ܎ٯసͷݪଇ • ઃܭͷݪଇΛ༻͍ͯίʔυͷष͍ΛऔΓআ͘

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Ϟδϡʔϧؒͷґଘੑ͕͋Δ • ଞϞδϡʔϧͷ࣮૷͕มΘΔ͜ͱͰͪ͜Βͷॲཧ͕ӨڹΛड ͚ͯ͠·͏͜ͱ 36

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func didTapSearchButton(text: String?) { ~~~ লུ ~~~ SearchModel().search(searchWord: searchWord) { result in switch result { case .success(let events): ~~ লུ ~~ case .failure: ~~ লུ ~~ } } } 37

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func didTapSearchButton(text: String?, model: SearchModel) { ~~~ লུ ~~~ model.search(searchWord: searchWord) { result in switch result { case .success(let events): ~~ লུ ~~ case .failure: ~~ লུ ~~ } } } ֎ଆ͔ΒΦϒδΣΫτΛ ౉͢Α͏ʹ 41

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func didTapSearchButton(text: String?, model: SearchModelProtocol) { ~~~ লུ ~~~ model.search(searchWord: searchWord) { result in switch result { case .success(let events): ~~ লུ ~~ case .failure: ~~ লུ ~~ } } } ౉͢ܕΛந৅Խ͞Εͨ ܕʹ͢Δ 42

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43 protocol SearchEventModelProtocol { func search(searchWord: String, completion: @escaping ((Result<[ConnpassEvent]>) -> ())) } Protocol

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class FakeSearchEventModel: SearchEventModelProtocol { var search_successValue = [ConnpassEvent]() func search(searchWord: String, completion: @escaping ((Result<[ConnpassEvent]>) -> ())) { search_callCount += 1 search_arguments = searchWord completion(.success(search_successValue)) } } class FakeFailureSearchEventModel: SearchEventModelProtocol { func search(searchWord: String, completion: @escaping ((Result<[ConnpassEvent]>) -> ())) { search_arguments = searchWord completion(.failure) } } ελϒ ґଘ͢ΔΦϒδΣΫτͷ݁ՌΛ ίϯτϩʔϧͰ͖Δ

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• ͜ͷґଘ͢ΔΦϒδΣΫτΛ֎ଆ͔Β౉্ͯ͛͠Δ͜ͱ ΛDI(Dependency Injection)ͱ͍͏ • ౉͢ΦϒδΣΫτ͸ந৅Խ͞Ε͍ͯΔͷͰɺςετίʔ υ͔Β͸ελϒΛ౉͢͜ͱ͕Ͱ͖Δ • Modelͷ࣮૷ʹґଘͤͣ੒ޭɺࣦഊͦΕͧΕͷςετ͕ ՄೳͱͳΔ 45

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• ࣮ࡍʹ͸JavaͰ͋Ε͹MockitoΛ࢖͑͹΋͏গָ͠ʹͳͬ ͨΓ͸͋Δ • ͕ɺSwiftͰ͸ϥΠϒϥϦΛ༻͍ͳ͍͜ͷύλʔϯ͕ൺֱ తଟ͍ • ͜ΕΒͷ஌͕ࣝͳ͍ͱॻ͘͜ͱ͕೉͍͠ 46

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ઃܭҎ֎ͷཁૉ • ςεςΟϯάϑϨʔϜϫʔΫͷ࢖͍ํ(XCTest, Quick/Nimble) • ඇಉظॲཧͷςετ • ಛʹඇಉظ͸׳Εͳ͍ͱ೉͍͠  iOSͰ͸ReactiveX(RxSwift)͕ελϯμʔυ(Combine) 47

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ReactiveX • FRP(Functional Reactive Programming) • ௒ͬ͘͟Γ͍͏ͱStreamͱ͍͏࣌ؒͷྲྀΕΛ༻͍ͯඇಉظॲཧΛ؆ ܿʹॻ͚ΔΑ͏ʹͨ͠ख๏ • บ͕͋ΔͷͰ׳Εͳ͍ͱগ͠೉͍͠ • ςετͰ΋ಉظతʹѻͬͯ͋͛ͨΓɺςετ༻ͷStreamͰ؅ཧͨ͠Γ 48

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ςετΛॻͨ͘Ίʹ஌Βͳ͖Ό ͍͚ͳ͍͜ͱ͸ଟ͍ 49

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• ΍Βͳ͍ͷͰ͸ͳ͘΍ΔεΩϧ͕ແ͔ͬͨ • ΍Γͨͯ͘΋αΫοͱͰ͖ΔઃܭͰ͸ແ͔ͬͨ • Ͱ΋͜ͷลͷ஌ࣝɺͲ͜Ͱֶ΂͹͍͍ͷ…ʁ

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ֶͿͨΊͷ໌Δ͍ஹ͠ 51

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ίϛϡχςΟͷಇ͖ • ςετʹؔ͢Δษڧձ (TestNight) • Ϋϥ΢υϑΝ΢ϯσΟϯά(PEAKS)ʹΑΔ  Android / iOSςετશॻץߦ(iOS͸8݄༧ఆ) 52

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ٕज़ॻయ લճࢲ΋͜Μͳͷग़͠·ͨ͠

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·ͱΊ • গͳ͘ͱ΋ϞόΠϧΞϓϦ։ൃऀ಺Ͱ΋ςετʹର͢Δҙࣝ ͸ؒҧ͍ͳ͘ߴ·͍ͬͯΔ(ͱࢥ͏) • αʔόɺϑϩϯτͳͲ΋ϑϨʔϜϫʔΫͷൃల΍ΞδϟΠϧ ͷਁಁͱͱ΋ʹҙࣝ͸ߴ·͍ͬͯΔΑ͏ʹݟ͑Δ 54

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• ؍ଌൣғͰ͸ςετΛͲ͏ʹ͔͍ͨ͠ͱࢥ͍ͬͯΔ։ൃ ऀ͕ଟ͍ • Ձ஋͋ΔαʔϏεΛಧ͚͍ͨͱ͍͏ࢥ͍͸୭͠΋ಉ͡ͳ ͸ͣ • ։ൃऀ/ςετΤϯδχΞ͕ڠྗͯ͠ςετʹର͢Δ஌ݟ ΛਂΊ͍͚ͯͨΒخ͍͠ 55

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• iOSΞϓϦઃܭύλʔϯೖ໳  ؔ ོٛɾদؗ େًɾླ໦ େوɾਿ্ ༸ฏɾ࢙ ᠳ৽ɾాத ݡ ࣏ɾՃ౻ ׮ਓ ஶ  https://peaks.cc/books/iOS_architecture • Clean Architecture ୡਓʹֶͿιϑτ΢ΣΞͷߏ଄ͱઃܭ  Robert.C.Martinஶ ֯ ੐యɾߴ໦ ਖ਼߂ ༁ ࢀߟॻ੶

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• Test Night  https://testnight.connpass.com/ • Androidςετશॻ  https://peaks.cc/books/android_testing • iOSςετશॻ  https://peaks.cc/iOS_testing

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ 58