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TypeScriptとテストをはじめた
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syukai
April 25, 2019
Programming
0
940
TypeScriptとテストをはじめた
v-kansai #5の登壇資料です。
JavaScriptで書いたVue.jsをTypeScriptに書き直してユニットテストを追加した話
syukai
April 25, 2019
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Transcript
5ZQF4DSJQUͱςετ Λ͡Ίͨ WLBOTBJ !TZVLBJ
ࣗݾհ ϢΧΠ !TZVLBJ ීஈͬͯΔ͜ͱ w +BWB w 4QSJOH #PPU
w 7VFKT w /&5ͪΐͬ͜ͱ
લճ ͷ͓͞Β͍ w 5ZQF4DSJQUͷಋೖ͕ݱࡏਐߦܗ w Ϣχοτςετͷಋೖݱࡏਐߦܗ w ࢲ͡Όͳ͍ਓ͕ؤுͬͯΔ͚ͲπϥΠ
5ZQF4DSJQU
5ZQF4DSJQUಋೖ w ͢Ͱʹ+BWB4DSJQUͰग़དྷ্͕ͬͯΔͷΛมߋ w ͬͺΓܕ͕ͳ͍ͱ͠ΜͲ͍ w ίʔυॻ͍ͯͯʮ͜ΕͷܕͳΜ͚ͩͬʁʯͱ͔໘ w Τϥʔݟ͔ͯΒʮ͋ʔͦ͏͍จࣈྻͩͬͨΘʯ w
໊߲ͱ͔74$PEF༷ʹڭ͑ͯ΄͍͠ w εϖϧϛε͕࣮ߦ࣌ʹൃ֮ͱ͔ɾɾɾ
QBDLBHFKTPO w WVFDMJͰ࡞ͬͨΩϨΠͳQBDLBHFKTPOʹඞཁͳͷΛҠ ২ w WVFNBUFSJBM༻ʹ!UZQFTWVFNBUFSJBMΛՃ w OQNJOTUBMM͢ΔͱQBDLBHFKTPO͔Βফ͑Δɾɾɾ
ͱΓ͋͑ͣίϯύΠϧ௨͢ w KTΛUTʹม͑Δ w จ๏ͷҧ͍Λมߋ w FYQPSUɺQSPQ NFUIPE DPNQVUFEɺSPVUFSUT w
BOZ͍ͬͯͬͺ͍ॻ͍ͨ w ͱΓ͋͑ͣίϯύΠϧ௨ͬͯͳΜͱͳ͘ಈ͚͍ͬͨΜ҆ ৺Ͱ͖Δ
<script> JavaScript export default { props: ['model', 'mode'], data() {
return {}; }, computed: { isAmode() { return this.mode === 'A'; } } } <script lang=“ts"> TypeScript import Vue from 'vue' @Component({}) export default class Card extends Vue { @prop() model!: any; @prop() mode!: string; /** computed */ get isAmode() { return this.mode === 'A'; } })
ܕΛݫ֨ʹ͍ͯ͘͠ w ͨΓલ͚ͩͲBOZͰશવخ͘͠ͳ͍ w TIJNTNZ.PEFMEUTΛ࡞ͬͯJOUFSGBDFͱͯ͠ܕΛఆٛ w BOZΛͪΌΜͱͨ͠ܕʹॻ͖͍͑ͯ͘ w JOQVU͕Λͯ͘͠ΕΔΑ͏ʹ͢Δ WNPEFM⇛WNPEFMOVNCFS
<<Employee.d.ts>> // RestAPIͰड͚औΔσʔλͷܕ export = Employee; declare interface Employee {
id: string; name: string; } <<shims-myModel.d.ts>> import _Employee from '@/model/Employee'; export = myModel; declare module myModel { export interface Employee extends _Employee {} } <<template>> <input v-model.number=“age” />
5ZQF4DSJQUରԠͷ্͛ w &4MJOUΛ54MJOUʹมߋ w 54MJOUWVFDMJQMVHJOUZQFTDSJQUͷͷΛ༻
Ϣχοτςετ
͠ΌΓ͍ͨ͜ͱ ΫοΫϒοΫʹ ΄΅ॻ͍ͯ͋ͬͨ Vue.jsΫοΫϒοΫɿVue ίϯϙʔωϯτͷ୯ମςετ https://jp.vuejs.org/v2/cookbook/unit-testing-vue-components.html
ͳͥςετΛ͢ΔͷͰ͔͢ ίϯϙʔωϯτͷ୯ମςετʹͨ͘͞Μͷར͕͋Γ·͢: • ίϯϙʔωϯτ͕Ͳ͏ಈ࡞͖͔͢ͷυΩϡϝϯτΛఏڙ͠ ·͢ • աͳखಈςετͷ࣌ؒΛઅ͠·͢ • ৽͍͠ػೳʹ͓͚ΔόάΛݮΒ͠·͢ •
ઃܭΛվྑ͠·͢ • ϦϑΝΫλϦϯάΛ༰қʹ͠·͢ ࣗಈςετେنͳ։ൃνʔϜ͕ෳࡶͳίʔυϕʔεΛอͭ ͜ͱΛՄೳʹ͠·͢ɻ
࣮ྫ ୯ମςετͷ͖͢͜ͱ: • ࣮ߦ͕ૣ͍͜ͱ • ཧղ͍͢͜͠ͱ • Ұͭͷ࡞ۀ ͚ͩΛςετ͢Δ͜ͱ ʢதུʣ
্هςετʹ͍͔ͭ͘ͷ͕͋Γ·͢: • 1ͭͷςετ͕ҟͳΔ͜ͱʹ͍ͭͯΞαʔγϣϯΛߦ͍ͬͯ·͢ • ίϯϙʔωϯτ͕ଘࡏͰ͖ΔҟͳΔঢ়ଶඳը͖͢ͷΛ͑Δͷ͕͍͠ ҎԼͷྫͰɺςετΛ࣍ͷΑ͏ʹվળ͍͖ͯ͠·͢: • it ϒϩοΫ͝ͱʹ1ͭͷΞαʔγϣϯͷΈ࡞͢Δ • ͘໌֬ͳςετͷઆ໌Λ࣋ͭ • ςετʹඞཁͳ࠷ݶͷσʔλ͚ͩΛఏڙ͢Δ • ॏෳͨ͠ϩδοΫʢwrapper ͷ࡞ͱ username มͷઃఆʣΛϑΝΫτϦؔ ʹϦϑΝΫλϦϯά͢Δ
ͦΕͦΕͱͯ͠ ͱΓ͋͑ͣ͠·͢
+FTU w ެࣜΛݟͳ͕Β+FTUରԠΛਐΊΔ
ࢀߟ w ʮ͡Ίͯͷࣗಈςετʯ w ςετͷߟ͑ํΓ͚ํ
Ϣχοτςετ
ํ w ςετΛཉுΒͳ͍ w 6*ςετఘΊΔ w ֎෦࿈ܞఘΊΔ w QSJWBUFͷςετέʔε͍Βͳ͍ w
͍͖ͳΓશ෦ٻΊͳ͍ʂϢχοτϨϕϧͷ҆શ֬อʂ
ྫʣQSJWBUF prevMonth(): void { this.addMonth(-1); } nextMonth(): void { this.addMonth(1);
} private addMonth(months: number): void { let nextYear: number = Number(this.yyyy); let nextMonth: number = Number(this.mm) + months; if(nextMonth === 13) { nextYear += 1; nextMonth = 1; } else if (nextMonth === 0) { nextYear -= 1; nextMonth = 12; } this.yyyy = nextYear; this.mm = nextMonth; } w ʢ࣮͕ΞϨͳͷ͓͖ͯ͞ʜʣ w BEE.POUIͷҾ͔͔͋͠ Γ͑ͳ͍ w ͦΕҎ֎Λςετ͢Δඞཁͳ͠
ςετέʔε w JU̍ͭͰ̍ςετέʔεʹ͢Δʂ w ͳΜͷςετ͔ͩΘ͔Βͳ͘ͳΔ w JUͷ్தͰೖσʔλΛೖΕସ͑ͳ͍ w Ξαʔγϣϯෳ͋ͬͯΑ͍ ͭͷೖσʔλͰෳͷ߲ɾঢ়ଶΛ֬ೝ͢Δ
ྫʣJU̍ͭͰ̍ςετέʔε <<before>> it('ϙΠϯτ͕ϚΠφεͳΒ0ʹ͢Δ', () => { wrapper.vm.form.points = 1; wrapper.vm.onValidPoint();
expect(wrapper.vm.form.points).toBe(1); wrapper.vm.form.points = -1; wrapper.vm.onValidPoint(); expect(wrapper.vm.form.points).toBe(0); });
ྫʣJU̍ͭͰ̍ςετέʔε <<after>> it(‘onValidPoint ௨ৗ', () => { wrapper.vm.form.points = 1;
wrapper.vm.onValidPoint(); expect(wrapper.vm.form.points).toBe(1); }); it(‘onValidPoint ϚΠφε', () => { wrapper.vm.form.points = -1; wrapper.vm.onValidPoint(); expect(wrapper.vm.form.points).toBe(0); });
"1*ݺͼग़͠ͷςετ w "1*ݺͼग़͠ʹ"YJPTΛ༻ w ϢχοτςετͰ"1*ݺͼग़ͨ͘͠͠ͳ͍ʂ w "YJPTͬͨ"1*ݺͼग़͠ॲཧΛಠཱͤ͞Δ w ্هॲཧΛϞοΫʹஔ͖͑Δ
ྫʣ"QJΛݺͼग़͠Λಠཱ <<EmpoyeesApi.ts>> import axiosBase from '@/module/AxiosBase' let axios = axiosBase.axios;
export default { getEmployees(): Promise<any> { return axios.get('employees'); } } <<hoge.spec.ts>>ɹaxiosࠩ͠ସ͑େมͳͷͰApi͝ͱࠩ͠ସ͑ const getEmployeesMock = jest.fn(); jest.mock('@/module/api/EmployeesApi', () => { return { getEmployees: getEmployeesMock }; })
ը໘දࣔͷςετ w Βͳ͍ʂʂʂʂ w 7VFKT͔ͩΒσʔλ͕େৎͳΒදࣔେৎͩΖʂ w େৎͳΜͩΑʂʂʂʂ w ͱ͍͑USBOTJUJPO͕͏·͘ಈ͍ͯΔ͔ɺσʔλͷ࠶ܭࢉ ͕ͪΌΜͱԠͯ͠Δ͔ؾʹͳΔͱ͜Ζ
⇛Ͳ͏͠Α͏
ςετॻ͍ͯಘͨݟ
ίϯϙʔωϯτখ͘͢͞Δ w Ͱ͔͍ίϯϙʔωϯτπϥΠɻখ͘͞͠Α͏ w ͨΒϞοΫʹཔΖ͏ͱ͢Δ͜ͱʹͳΓɺͦͯ͠ϋϚΔ w ςετέʔεͷΈ߹Θ͕ͤෳࡶʹͳΔ w ςετίʔυ͕͘ͳΓಡΉؾ͕ࣦͤΔ w
ςετέʔεΓͯΔ͔Θ͔Μͳ͍
ΫϥεΛੵۃతʹ࡞Δ w ΫϥεʹΓग़ͯ͠QSJWBUFʹ͢ΕࢀরՕॴ͕ݮͬͯς ετύλʔϯ͕άοͱߜΕΔ w ॻ͍ͯͯؾ͍͚ͮͨͲςετύλʔϯߟ͑Δͷ͕໘ͬͯ ͜ͱӨڹՕॴଟ͍͔Βόάग़͍ͬͯ͢͜ͱͩΑͶ
5ZQF4DSJQU͡Όͳ͍ͱπϥΠ w ผͷҊ݅Ͱ+BWB4DSJQUͷ··ςετͯ͠Έͨ w GVODUJPOͷϞοΫࠩ͠ସ͕͍͑͠ ϦϙδτϦͷςετ͕πϥΠ w Ұ5ZQF4DSJQUΔͱ͏ܕແ͍ͷ໘͍͘͞
·ͩ·ͩΘ͔Βͳ͍ͷͰ ͬͱςετॻ͜͏
͝ਗ਼ௌ ͋Γ͕ͱ͏͍͟͝·ͨ͠