State of Testing in Kotlin

We will check the different libraries and strategies to apply Kotlin testing in our projects.

Mallorca.

Transcript

1. State of Testing in otlin @inyaki_mwc
7. https://pusher.com/state-of-kotlin
8. https://insights.stackoverflow.com/survey/2018#most-loved-dreaded-and-wanted
9. https://pusher.com/state-of-kotlin https://insights.stackoverflow.com/survey/2018#most-loved-dreaded-and-wanted
10. *.dex *.class Java complier application.apk
11. *.dex *.class Java complier Kotlin complier application.apk
12. Kotlin JVM NATIVE JS Android Server IOS MacOs Linux Windows Web Assembly
13. Kotlin
14. Kotlin Nullability Language Features Sealed Classes HOF Lambdas Contracts Inlining Data Classes …
15. Kotlin Nullability Language Features Sealed Classes HOF Lambdas Contracts Inlining Data Classes … Static Tools
16. Kotlin Nullability Language Features Sealed Classes HOF Lambdas Contracts Inlining Data Classes … Static Tools Lint Koshry Detekt …
17. Kotlin Nullability Language Features Sealed Classes HOF Lambdas Contracts Inlining Data Classes … Static Tools Lint Koshry Detekt … Testing
18. sourceSets { test { java.srcDirs += "src/test/kotlin" } }
19. sourceSets { test { java.srcDirs += "src/test/kotlin" } }
20. @Test public void testThreeReturnsFizz() { final FizzBuzz fizzBuzz = new FizzBuzz(); assertTrue(“Fizz", fizzBuzz.get(3)); }
21. @Test public void testThreeReturnsFizz() { final FizzBuzz fizzBuzz = new FizzBuzz(); assertTrue(“Fizz", fizzBuzz.get(3)); } @Test fun testThreeReturnsFizz() { val fizzBuzz = FizzBuzz() assertTrue("Fizz" == fizzBuzz.get(3)) }
22. @Test public void testThreeReturnsFizz() { final FizzBuzz fizzBuzz = new FizzBuzz(); assertTrue(“Fizz", fizzBuzz.get(3)); } @Test fun testThreeReturnsFizz() { val fizzBuzz = FizzBuzz() assertTrue("Fizz" == fizzBuzz.get(3)) }
23. @Test public void testThreeReturnsFizz() { final FizzBuzz fizzBuzz = new FizzBuzz(); assertTrue(“Fizz", fizzBuzz.get(3)); } @Test fun testThreeReturnsFizz() { val fizzBuzz = FizzBuzz() assertTrue("Fizz" == fizzBuzz.get(3)) }
24. @Test fun testThreeReturnsFizz() { val fizzBuzz = FizzBuzz() assertTrue("Fizz" == fizzBuzz.get(3)) }
25. @Test fun testThreeReturnsFizz() { val fizzBuzz = FizzBuzz() assertTrue("Fizz" == fizzBuzz.get(3)) } @Test fun `three returns Fizz`() { val fizzBuzz = FizzBuzz() assertTrue("Fizz" == fizzBuzz.get(3)) }
26. @Test public void testUseCaseGetSectorPerformanceDataCallsRepository() { // Arrange when(detailsSectorRepository.getSectorPerformanceData("1")) .thenReturn(Observable.just(getMockListSectorDomain())); // Act getDaily.getSectorByType("1"); // Assert verify(detailsSectorRepository).getSectorPerformanceData("1"); }
27. @Test public void testUseCaseGetSectorPerformanceDataCallsRepository() { // Arrange when(detailsSectorRepository.getSectorPerformanceData("1")) .thenReturn(Observable.just(getMockListSectorDomain())); // Act getDaily.getSectorByType("1"); // Assert verify(detailsSectorRepository).getSectorPerformanceData("1"); }
28. @Test fun testUseCaseGetSectorPerformanceDataCallsRepository() { // Arrange when(detailsSectorRepository.getSectorPerformanceData("1")) .thenReturn(Observable.just(emptyList())) // Act getDaily.getSectorByType("1") // Assert verify(detailsSectorRepository).getSectorPerformanceData("1") }
29. @Test fun testUseCaseGetSectorPerformanceDataCallsRepository() { // Arrange when(detailsSectorRepository.getSectorPerformanceData("1")) .thenReturn(Observable.just(emptyList())) // Act getDaily.getSectorByType("1") // Assert verify(detailsSectorRepository).getSectorPerformanceData("1") }
30. @Test fun testUseCaseGetSectorPerformanceDataCallsRepository() { // Arrange when(detailsSectorRepository.getSectorPerformanceData("1")) .thenReturn(Observable.just(emptyList())) // Act getDaily.getSectorByType("1") // Assert verify(detailsSectorRepository).getSectorPerformanceData("1") }
31. @Test fun testUseCaseGetSectorPerformanceDataCallsRepository() { // Arrange `when`(detailsSectorRepository.getSectorPerformanceData("1")) .thenReturn(Observable.just(emptyList())) // Act getDaily.getSectorByType("1") // Assert verify(detailsSectorRepository).getSectorPerformanceData("1") } import org.mockito.Mockito.`when`
32. https://github.com/nhaarman/mockito-kotlin
33. https://github.com/nhaarman/mockito-kotlin @Test fun testUseCaseGetSectorPerformanceDataCallsRepository() { // Arrange whenever(detailsSectorRepository.getSectorPerformanceData("1")) .thenReturn(Observable.just(emptyList())) // Act getDaily.getSectorByType("1") // Assert verify(detailsSectorRepository).getSectorPerformanceData("1") }
34. https://github.com/nhaarman/mockito-kotlin @Test fun testUseCaseGetSectorPerformanceDataCallsRepository() { // Arrange whenever(detailsSectorRepository.getSectorPerformanceData("1")) .thenReturn(Observable.just(emptyList())) // Act getDaily.getSectorByType("1") // Assert verify(detailsSectorRepository).getSectorPerformanceData("1") }
35. val db = mock<SectorsDbInterface> { on { getDetailsBySector(anyString()) } doReturn (Observable.just(getMockListSectorDb())) }
36. val db = mock<SectorsDbInterface> { on { getDetailsBySector(anyString()) } doReturn (Observable.just(getMockListSectorDb())) }
37. val db = mock<SectorsDbInterface> { on { getDetailsBySector(anyString()) } doReturn (Observable.just(getMockListSectorDb())) } fun <R> on(methodCall: T.() -> R): OngoingStubbing<R> { return try { Mockito.`when`(mock.methodCall()) } catch (e: NullPointerException) { throw MockitoKotlinException( "", e ) } }
38. @Query("SELECT * FROM DetailSectorDb WHERE description= :description") suspend fun getDetailsBySector(description: String): List<DetailSectorDb>
39. @Query("SELECT * FROM DetailSectorDb WHERE description= :description") suspend fun getDetailsBySector(description: String): List<DetailSectorDb>
40. @Query("SELECT * FROM DetailSectorDb WHERE description= :description") suspend fun getDetailsBySector(description: String): List<DetailSectorDb> val db = mock<SectorsDbInterface> { onBlocking { getDetailsBySector(anyString()) } doReturn getMockListSectorDb() }
41. @Query("SELECT * FROM DetailSectorDb WHERE description= :description") suspend fun getDetailsBySector(description: String): List<DetailSectorDb> val db = mock<SectorsDbInterface> { onBlocking { getDetailsBySector(anyString()) } doReturn getMockListSectorDb() }
42. @Query("SELECT * FROM DetailSectorDb WHERE description= :description") suspend fun getDetailsBySector(description: String): List<DetailSectorDb> val db = mock<SectorsDbInterface> { onBlocking { getDetailsBySector(anyString()) } doReturn getMockListSectorDb() } fun <T : Any, R> KStubbing<T>.onBlocking( m: suspend T.() -> R ): OngoingStubbing<R> { return runBlocking { Mockito.`when`(mock.m()) } }
43. @Query("SELECT * FROM DetailSectorDb WHERE description= :description") suspend fun getDetailsBySector(description: String): List<DetailSectorDb> val db = mock<SectorsDbInterface> { onBlocking { getDetailsBySector(anyString()) } doReturn getMockListSectorDb() } fun <T : Any, R> KStubbing<T>.onBlocking( m: suspend T.() -> R ): OngoingStubbing<R> { return runBlocking { Mockito.`when`(mock.m()) } }
44. https://github.com/kotlintest/kotlintest
45. https://github.com/kotlintest/kotlintest
46. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing
47. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing
48. https://github.com/kotlintest/kotlintest String Spec Fun Spec Should Spec Word Spec Feature Spec Behavior Spec Free Spec Testing Styles Matchers/Assertions Inspectors Property Testing
49. https://github.com/kotlintest/kotlintest String Spec Fun Spec Should Spec Word Spec Feature Spec Behavior Spec Free Spec Testing Styles Matchers/Assertions Inspectors Property Testing class MyTests : StringSpec({ "strings.length should return size of string" { "hello".length shouldBe 5 } })
50. https://github.com/kotlintest/kotlintest String Spec Fun Spec Should Spec Word Spec Feature Spec Behavior Spec Free Spec Testing Styles Matchers/Assertions Inspectors Property Testing class GetPairsImplTest : BehaviorSpec({ given("GetPairs Implementation") { `when`("There are no Pairs ") { val pairRepository = mock<PairsRepository> { } val getPairs = GetPairsImpl(pairRepository) whenever(pairRepository.getPairs()).thenReturn(emptyList()) getPairs.get() then("I should sync Pairs") { verify(pairRepository).syncPairs() } } } })
51. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing
52. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing
53. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing General Collections Types Files Threads Dates
54. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing General Collections Types Files Threads Dates clientIsConnected.shouldBeTrue() status.shouldBe("connected")
55. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing General Collections Types Files Threads Dates clientIsConnected.shouldBeTrue() status.shouldBe("connected") clientIsConnected shouldBe true status shouldBe("connected")
56. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing https://arrow-kt.io/
57. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing https://arrow-kt.io/
58. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing
59. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing
60. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing class TestInspectors : StringSpec({ "All the elements in the list formatted" { val xs = listOf("aa_1", "aa_2", "aa_3") xs.forAll { it.shouldContain("_") it.shouldStartWith("aa") } } })
61. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing class TestInspectors : StringSpec({ "All the elements in the list formatted" { val xs = listOf("aa_1", "aa_2", "aa_3") xs.forAll { it.shouldContain("_") it.shouldStartWith("aa") } } })
62. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing class TestInspectors : StringSpec({ "All the elements in the list formatted" { val xs = listOf("aa_1", "aa_2", "aa_3") xs.forAll { it.shouldContain("_") it.shouldStartWith("aa") } } }) forAll forNone forAtMostOne forAtLeastOne forAny
63. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing
64. https://github.com/kotlintest/kotlintest Testing Styles Matchers/Assertions Inspectors Property Testing "String size" { assertAll { a: String, b: String -> (a + b).length shouldBe a.length + b.length } }
65. https://github.com/kotlintest/kotlintest testImplementation("io.kotlintest:kotlintest-runner-junit5:3.3.0")
66. https://github.com/kotlintest/kotlintest val test by tasks.getting(Test::class) { useJUnitPlatform { } } testImplementation("io.kotlintest:kotlintest-runner-junit5:3.3.0")
68. description.should(endWith(value))
69. description.should(endWith(value)) description should endWith(value)
70. description.should(endWith(value)) description should endWith(value) infix fun <T> T.should(matcher: Matcher<T>)
71. description.should(endWith(value)) description should endWith(value) infix fun <T> T.should(matcher: Matcher<T>)
72. description.should(endWith(value)) description should endWith(value) infix fun <T> T.should(matcher: Matcher<T>)
73. description.should(endWith(value)) description should endWith(value) infix fun <T> T.should(matcher: Matcher<T>)
74. DEMO
75. I am your Father Luke DEMO
77. onView(withId(R.id.overview_sectors_list)) .perform(click()) .check(matches(isDisplayed()))
79. val description: KTextView = KTextView { withId(R.id.text_view_small) } val title: KTextView = KTextView { withId(R.id.text_view_large) }
80. val description: KTextView = KTextView { withId(R.id.text_view_small) } val title: KTextView = KTextView { withId(R.id.text_view_large) } @Test fun testContentScreen() { screen { content { isVisible() } description { click() isVisible() hasAnyText() } title { isVisible() hasAnyText() } } }
81. val description: KTextView = KTextView { withId(R.id.text_view_small) } val title: KTextView = KTextView { withId(R.id.text_view_large) } @Test fun testContentScreen() { screen { content { isVisible() } description { click() isVisible() hasAnyText() } title { isVisible() hasAnyText() } } }
82. val description: KTextView = KTextView { withId(R.id.text_view_small) }
83. val description: KTextView = KTextView { withId(R.id.text_view_small) } class KTextView : KBaseView<KTextView>, TextViewAssertions { constructor(function: ViewBuilder.() -> Unit) : super(function) constructor(parent: Matcher<View>, function: ViewBuilder.() -> Unit) : super(parent, function) }
84. val description: KTextView = KTextView { withId(R.id.text_view_small) } class KTextView : KBaseView<KTextView>, TextViewAssertions { constructor(function: ViewBuilder.() -> Unit) : super(function) constructor(parent: Matcher<View>, function: ViewBuilder.() -> Unit) : super(parent, function) }
85. val description: KTextView = KTextView { withId(R.id.text_view_small) } class KTextView : KBaseView<KTextView>, TextViewAssertions { constructor(function: ViewBuilder.() -> Unit) : super(function) constructor(parent: Matcher<View>, function: ViewBuilder.() -> Unit) : super(parent, function) } constructor(function: ViewBuilder.() -> Unit) { view = ViewBuilder().apply(function).getViewInteraction() }
86. Spek MockK https://mockk.io/ Kluent https://markusamshove.github.io/Kluent/ https://spekframework.org/ https://www.kotlinresources.com/library/assertk/ AssertK
87. Strategies Testing Kotlin Mockito Kotlin Kotlin Test Kakao https://github.com/nhaarman/mockito-kotlin https://github.com/kotlintest/kotlintest https://github.com/agoda-com/Kakao
88. @inyaki_mwc Thanks