今日から始めるAndroid Unit Test

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1. Katsumi Kusumi @ and factory.inc 1 ࠓ೔͔Β࢝ΊΔ Android Unit Test Tips
2. About Me 2 • Katsumi Kusumi(@kl_tech) • and factory • Android App Engineer • ອըΞϓϦ࡞ͬͯ·͢ɻ
3. 3 AndroidΤϯδχΞͷօ͞Μ
4. 4 Unit Testͬͯॻ͍ͯ·͔͢ʁʁ
5. AndroidͱUnit Test 5 • ΞϓϦͷςετઓུͷجૅͱͳΔςετ • Ϗϧυ΍PR࡞੒ͷͨͼʹ࣮ߦ͢Ε͹ɺσάϨ౳ͷόάΛิ ଍͠΍͘͢ͳΔɻ • ϩʔΧϧςετͱɺΠϯετΡϧϝϯτԽςετͷ2छྨ ͕͋Δɻ • ςετͷϐϥϛουͷҰ൪Լʂ
6. 6 ஏ͔ͣ͠ͳ͕Βɺɺɺ ࠷ۙςετΛॻ͖࢝Ί·ͨ͠ɻ
7. ࠓ೔͓࿩͢Δ͜ͱ 7 1. privateؔ਺Λςετ͢Δํ๏ 2. ؔ਺ͷݺͼग़͠ςετΛ࣮ࢪ͢Δํ๏ 3. mockΛγϯϓϧʹॻ͘ํ๏ গͳ͍͚Ͳ͜ͷࡾͭʂ
8. 8 1. privateؔ਺Λςετ͢Δํ๏
9. 1. privateؔ਺Λςετ͢Δํ๏ 9 ▪ͦ΋ͦ΋ԿނϋϚ͔ͬͨ Unit TestͰ͸ɺςετର৅ͷؔ਺Λ࣋ͭΫϥεΛΠϯελϯεԽͤͯ͞ς ετΛݺͼग़͠ɺฦ٫஋΍ݺͼग़͠ϝιουΛ֬ೝ͢Δɻ →֎ଆʢςετʣ͔Β͡Όprivateϝιουݺͼग़ͤͳ͍͡ΌΜɻ
10. 10 1. privateؔ਺Λςετ͢Δํ๏ class ViewModel { fun publicFunction() = "public" private fun privateFunction() = "private" } ▪͜͏͍͏ViewModelΛςετ͢Δ৔߹
11. 11 1. privateؔ਺Λςετ͢Δํ๏ class ViewModel { fun publicFunction() = "public" private fun privateFunction() = "private" } ▪publicͷ৔߹ @Test fun publicTest() { val viewModel = ViewModel() assert(viewModel.publicFunction() == "public") }
12. 12 1. privateؔ਺Λςετ͢Δํ๏ class ViewModel { fun publicFunction() = "public" private fun privateFunction() = "private" } ▪privateͷ৔߹ @Test fun privateTest() { val viewModel = ViewModel() assert(viewModel.privateFunction() == "private") }
13. 13 1. privateؔ਺Λςετ͢Δํ๏ ▪ղܾࡦ →ؔ਺ͷisAccessibleΛtrueʹͯ͠ɺແཧ΍ΓΞΫηε͢Δɻ
14. 14 1. privateؔ਺Λςετ͢Δํ๏ ▪ղܾࡦ →ؔ਺ͷisAccessibleΛtrueʹͯ͠ɺແཧ΍ΓΞΫηε͢Δɻ @Test fun privateTest() { val viewModel = ViewModel() val method = viewModel.javaClass.getDeclaredMethod( "privateFunction" ) method.isAccessible = true assert(method.invoke(viewModel) == "private") }
15. 15 2. ؔ਺ͷݺͼग़͠ςετΛ ࣮ࢪ͢Δํ๏
16. 2. ؔ਺ͷݺͼग़͠ςετΛ࣮ࢪ͢Δํ๏ 16 ▪ؔ਺ͷதͰɺଞͷؔ਺ΛͪΌΜͱݺΜͰΔ͔֬ೝ͍ͨ͠ʂ
17. 17 2. ؔ਺ͷݺͼग़͠ςετΛ࣮ࢪ͢Δํ๏ class UseCase { fun function1() = "Function1" fun function2() = "Function2" } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() } } ▫ؔ਺ͷதͰɺଞͷؔ਺ΛͪΌΜͱݺΜͰΔ͔֬ೝ͍ͨ͠ʂ
18. 18 2. ؔ਺ͷݺͼग़͠ςετΛ࣮ࢪ͢Δํ๏ class UseCase { fun function1() = "Function1" fun function2() = "Function2" } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() } } @Test fun executeTest() { val useCase: UseCase = mockk() every { useCase.function1() } returns "Function1" every { useCase.function2() } returns "Function2" val viewModel = ViewModel(useCase) viewModel.execute() verify(exactly = 1) { useCase.function1() } verify(exactly = 1) { useCase.function2() } } ▫΍Γ͔ͨ঺հ
19. 19 2. ؔ਺ͷݺͼग़͠ςετΛ࣮ࢪ͢Δํ๏ class UseCase { fun function1() = "Function1" fun function2() = "Function2" } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() } } @Test fun executeTest() { val useCase: UseCase = mockk() every { useCase.function1() } returns "Function1" every { useCase.function2() } returns "Function2" val viewModel = ViewModel(useCase) viewModel.execute() verify(exactly = 1) { useCase.function1() } verify(exactly = 1) { useCase.function2() } } ▫΍Γ͔ͨ঺հ
20. 20 2. ؔ਺ͷݺͼग़͠ςετΛ࣮ࢪ͢Δํ๏ class UseCase { fun function1() = "Function1" fun function2() = "Function2" } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() } } @Test fun executeTest() { val useCase: UseCase = mockk() every { useCase.function1() } returns "Function1" every { useCase.function2() } returns "Function2" val viewModel = ViewModel(useCase) viewModel.execute() verify(exactly = 1) { useCase.function1() } verify(exactly = 1) { useCase.function2() } } ▫΍Γ͔ͨ঺հ
21. 21 2. ؔ਺ͷݺͼग़͠ςετΛ࣮ࢪ͢Δํ๏ class UseCase { fun function1() = "Function1" fun function2() = "Function2" } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() } } @Test fun executeTest() { val useCase: UseCase = mockk() every { useCase.function1() } returns "Function1" every { useCase.function2() } returns "Function2" val viewModel = ViewModel(useCase) viewModel.execute() verify(exactly = 1) { useCase.function1() } verify(exactly = 1) { useCase.function2() } } ▫΍Γ͔ͨ঺հ
22. 22 3.mockkΛγϯϓϧʹॻ͘ํ๏
23. 3. mockkΛγϯϓϧʹॻ͘ํ๏ 23 ▪mockk͸ͱͬͯ΋ศར͚ͩͲɺॻ͘͜ͱ͕ଟ͍ʂ
24. 24 2. mockkΛγϯϓϧʹॻ͘ํ๏ ▫mockk͸ͱͬͯ΋ศར͚ͩͲɺॻ͘͜ͱ͕ଟ͍ʂ class UseCase { fun function1() = "Function1" fun function2() = "Function2" } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() } }
25. 25 2. mockkΛγϯϓϧʹॻ͘ํ๏ ▫mockk͸ͱͬͯ΋ศར͚ͩͲɺॻ͘͜ͱ͕ଟ͍ʂ class UseCase { fun function1() = "Function1" fun function2() = “Function2" fun function3() { … } fun function4() { … } fun function5() { … } } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() useCase.function3() useCase.function4() useCase.function5() } }
26. 26 2. mockkΛγϯϓϧʹॻ͘ํ๏ ▫mockk͸ͱͬͯ΋ศར͚ͩͲɺॻ͘͜ͱ͕ଟ͍ʂ class UseCase { fun function1() = "Function1" fun function2() = “Function2" fun function3() { } fun function4() { } fun function5() { } } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() useCase.function3() useCase.function4() useCase.function5() } } @Test fun executeTest() { val useCase: UseCase = mockk() every { useCase.function1() } returns "Function1" every { useCase.function2() } returns “Function2” every { useCase.function3() } returns Unit every { useCase.function4() } returns Unit every { useCase.function5() } returns Unit … }
27. 27 2. mockkΛγϯϓϧʹॻ͘ํ๏ ▫mockk͸ͱͬͯ΋ศར͚ͩͲɺॻ͘͜ͱ͕ଟ͍ʂ class UseCase { fun function1() = "Function1" fun function2() = “Function2" fun function3() { } fun function4() { } fun function5() { } } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() useCase.function3() useCase.function4() useCase.function5() } } @Test fun executeTest() { val useCase: UseCase = mockk() every { useCase.function1() } returns "Function1" every { useCase.function2() } returns “Function2” every { useCase.function3() } returns Unit every { useCase.function4() } returns Unit every { useCase.function5() } returns Unit … }
28. 28 2. mockkΛγϯϓϧʹॻ͘ํ๏ ▫ղܾࡦ class UseCase { fun function1() = "Function1" fun function2() = “Function2" fun function3() { } fun function4() { } fun function5() { } } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() useCase.function3() useCase.function4() useCase.function5() } } @Test fun executeTest() { val useCase: UseCase = mockk(relaxUnitFun = true) every { useCase.function1() } returns "Function1" every { useCase.function2() } returns “Function2” every { useCase.function3() } returns Unit every { useCase.function4() } returns Unit every { useCase.function5() } returns Unit … }
29. 29 2. mockkΛγϯϓϧʹॻ͘ํ๏ ▫ղܾࡦ class UseCase { fun function1() = "Function1" fun function2() = “Function2" fun function3() { } fun function4() { } fun function5() { } } class ViewModel(val useCase: UseCase) { fun execute() { useCase.function1() useCase.function2() useCase.function3() useCase.function4() useCase.function5() } } @Test fun executeTest() { val useCase: UseCase = mockk(relaxUnitFun = true) every { useCase.function1() } returns "Function1" every { useCase.function2() } returns “Function2” … }
30. ·ͱΊ 30 1. privateؔ਺Λςετ͢Δํ๏ →getDeclaredMethodΛ࢖ͬͯɺisAccessibleΛtrueʹ͠Α͏ʂ 2. ؔ਺ͷݺͼग़͠ςετΛ࣮ࢪ͢Δํ๏ →mockkͷverifyΛ࢖͓͏ʂsuspendʹ͸coVerifyΛʂ 3. mockΛγϯϓϧʹॻ͘ํ๏ →UnitΛฦؔ͢਺Λলͨ͘ΊʹɺrelaxUnitFun = trueΛ࢖͓͏ʂ
31. 31 ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ ྑ͍Android Unit TestϥΠϑΛʂ