KMMのテストのtips / KMM testing tips

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   🙆ςετίʔυ ,..ͷςετͷඞཁੑ https://speakerdeck.com/malvinstn/automated-testing-in-a-kmm-project?slide=6

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   5FTUͱͷҧ͍ // 🙅 @Rule @JvmField val rule = SomeTestRule() // 🙅 @MockK lateinit var mock: SomeInterface @Test fun test() { // 🙅 every { mock.doSomething() } just Runs doTest() // 🙅 verify { mock.doSomething() } }

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    class MyTest1 { lateinit var db: VisitAppDb @BeforeTest fun setup() { db = VisitAppDb(testSqlDriver()) } @AfterTest fun tearDown() { db.clean() } } class MyTest2 { lateinit var db: VisitAppDb @BeforeTest fun setup() { db = VisitAppDb(testSqlDriver()) } @AfterTest fun tearDown() { db.clean() } } class MyTest3 { lateinit var db: VisitAppDb @BeforeTest fun setup() { db = VisitAppDb(testSqlDriver()) } @AfterTest fun tearDown() { db.clean() } } class MyTest4… { lateinit var db: Visi @BeforeTest fun setup db = VisitAppDb(t } @AfterTest fun tearDo db.clean() } }

12. ©2021 Wantedly, Inc. 5FTU3VMF࣮૷ interface TestRule { fun onBeforeTest() =

    Unit fun onAfterTest() = Unit } class TestRules(vararg testRules: TestRule) : List<TestRule> by testRules.toList() interface HasTestRules { val testRules: TestRules @BeforeTest fun setupTestRules() { testRules.forEach { it.onBeforeTest() } } @AfterTest fun tearDownTestRules() { testRules.forEach { it.onAfterTest() } } }

13. ©2021 Wantedly, Inc. 5FTU3VMF࣮૷ interface TestRule { fun onBeforeTest() =

    Unit fun onAfterTest() = Unit } class TestRules(vararg testRules: TestRule) : List<TestRule> by testRules.toList() interface HasTestRules { val testRules: TestRules @BeforeTest fun setupTestRules() { testRules.forEach { it.onBeforeTest() } } @AfterTest fun tearDownTestRules() { testRules.forEach { it.onAfterTest() } } } ϧʔϧΛ࡞੒͢Δʹ͸5FTU3VMFΛ࣮૷

14. ©2021 Wantedly, Inc. 5FTU3VMF࣮૷ interface TestRule { fun onBeforeTest() =

    Unit fun onAfterTest() = Unit } class TestRules(vararg testRules: TestRule) : List<TestRule> by testRules.toList() interface HasTestRules { val testRules: TestRules @BeforeTest fun setupTestRules() { testRules.forEach { it.onBeforeTest() } } @AfterTest fun tearDownTestRules() { testRules.forEach { it.onAfterTest() } } } 5FTU3VMFΛ࢖͍͍ͨ5FTUΫϥεʹ࣮૷ͤ͞Δ ͜ΕΒͷσϑΥϧτ࣮૷͕5FTUΫϥεͰࣗಈͰݺ͹ΕΔ

15. ©2021 Wantedly, Inc. 5FTU3VMF࣮૷ class DbTestRule : TestRule { private

    lateinit var sqlDriver: SqlDriver lateinit var db: VisitAppDb private set override fun onBeforeTest() { sqlDriver = testSqlDriver() db = VisitAppDb(driver = sqlDriver) } override fun onAfterTest() { sqlDriver.close() } } class MyTest : HasTestRules { val dbTestRule = DbTestRule() override val testRules = TestRules(dbTestRule) @Test fun test() { dbTestRule.db.userQueries.insertOrReplace(User()) val all = dbTestRule.db.userQueries.selectAll().executeAsList() assertEquals(1, all.size) } }

16. ©2021 Wantedly, Inc. 5FTU3VMF࣮૷ class DbTestRule : TestRule { private

    lateinit var sqlDriver: SqlDriver lateinit var db: VisitAppDb private set override fun onBeforeTest() { sqlDriver = testSqlDriver() db = VisitAppDb(driver = sqlDriver) } override fun onAfterTest() { sqlDriver.close() } } class MyTest : HasTestRules { val dbTestRule = DbTestRule() override val testRules = TestRules(dbTestRule) @Test fun test() { dbTestRule.db.userQueries.insertOrReplace(User()) val all = dbTestRule.db.userQueries.selectAll().executeAsList() assertEquals(1, all.size) } } 5FTU3VMFΛ࣮૷ͯ͠#FGPSF"GUFSΛهड़ UFTU4RM%SJWFS ͕ຖճ%#ΫϦΞ͍ͯ͠Δ

17. ©2021 Wantedly, Inc. 5FTU3VMF࣮૷ class DbTestRule : TestRule { private

    lateinit var sqlDriver: SqlDriver lateinit var db: VisitAppDb private set override fun onBeforeTest() { sqlDriver = testSqlDriver() db = VisitAppDb(driver = sqlDriver) } override fun onAfterTest() { sqlDriver.close() } } class MyTest : HasTestRules { val dbTestRule = DbTestRule() override val testRules = TestRules(dbTestRule) @Test fun test() { dbTestRule.db.userQueries.insertOrReplace(User()) val all = dbTestRule.db.userQueries.selectAll().executeAsList() assertEquals(1, all.size) } } 5FTUΫϥεʹ)BT5FTU3VMFTΛ࣮૷

18. ©2021 Wantedly, Inc. 5FTU3VMF࣮૷ class DbTestRule : TestRule { private

    lateinit var sqlDriver: SqlDriver lateinit var db: VisitAppDb private set override fun onBeforeTest() { sqlDriver = testSqlDriver() db = VisitAppDb(driver = sqlDriver) } override fun onAfterTest() { sqlDriver.close() } } class MyTest : HasTestRules { val dbTestRule = DbTestRule() override val testRules = TestRules(dbTestRule) @Test fun test() { dbTestRule.db.userQueries.insertOrReplace(User()) val all = dbTestRule.db.userQueries.selectAll().executeAsList() assertEquals(1, all.size) } } ࢖͍͍ͨ5FTU3VMFΛࢦఆ

19. ©2021 Wantedly, Inc. 5FTU3VMF࣮૷ class DbTestRule : TestRule { private

    lateinit var sqlDriver: SqlDriver lateinit var db: VisitAppDb private set override fun onBeforeTest() { sqlDriver = testSqlDriver() db = VisitAppDb(driver = sqlDriver) } override fun onAfterTest() { sqlDriver.close() } } class MyTest : HasTestRules { val dbTestRule = DbTestRule() override val testRules = TestRules(dbTestRule) @Test fun test() { dbTestRule.db.userQueries.insertOrReplace(User(userId = 1, name = "Foo")) val all = dbTestRule.db.userQueries.selectAll().executeAsList() assertEquals(1, all.size) } } !#FGPSF5FTU!"GUFS5FTUΛॻ͔ͳͯ͘Α͘ͳΔ

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23. ©2021 Wantedly, Inc. ςελϒϧͳઃܭ class ApiClient { fun createUser(): User

    { // ࣮ࡍ͸௨৴͢Δ return User(…) } } class UserRepository { fun create(): User { return ApiClient().createUser() } }

24. ©2021 Wantedly, Inc. ςελϒϧͳઃܭ class ApiClient { fun createUser(): User

    { // ࣮ࡍ͸௨৴͢Δ return User(…) } } class UserRepository { fun create(): User { return ApiClient().createUser() } } "QJ$MJFOUͱ͍͏۩৅Ϋϥεʹґଘ͍ͯ͠Δ

25. ©2021 Wantedly, Inc. @Test fun test() { val user =

    UserRepository().create() // ௨৴݁Ռ͕Θ͔Βͳ͍ͷͰςετͰ͖ͳ͍ // ௨৴ࣦഊͨ͠ΒͲ͏ͳΔʁ } ςελϒϧͳઃܭ

26. ©2021 Wantedly, Inc. ςελϒϧͳઃܭ interface ApiClient { fun createUser(): User

    } class ApiClientImpl : ApiClient { override fun createUser(): User { // ࣮ࡍ͸௨৴͢Δ return User() } } class UserRepository(private val apiClient: ApiClient) { fun create(): User { return apiClient.createUser() } } "QJ$MJFOUͱ͍͏JOUFSGBDFʹ͢Δ

27. ©2021 Wantedly, Inc. ςελϒϧͳઃܭ interface ApiClient { fun createUser(): User

    } class ApiClientImpl : ApiClient { override fun createUser(): User { // ࣮ࡍ͸௨৴͢Δ return User() } } class UserRepository(private val apiClient: ApiClient) { fun create(): User { return apiClient.createUser() } } JOUFSGBDFΛ࣮૷ͨ͠*NQMΫϥεʹ͢Δ

28. ©2021 Wantedly, Inc. ςελϒϧͳઃܭ interface ApiClient { fun createUser(): User

    } class ApiClientImpl : ApiClient { override fun createUser(): User { // ࣮ࡍ͸௨৴͢Δ return User() } } class UserRepository(private val apiClient: ApiClient) { fun create(): User { return apiClient.createUser() } } JOUFSGBDFΛ஫ೖͯ͠JOUFSGBDFʹґଘ͢Δ

29. ©2021 Wantedly, Inc. ςελϒϧͳઃܭ class ApiClientMock : ApiClient { lateinit

    var mock: () -> User override fun createUser() = mock() } NPDLʹϥϜμΛೖΕΔ͜ͱͰDSFBUF6TFS ͷ݁ՌΛࠩ͠ସ͑

30. ©2021 Wantedly, Inc. @Test fun test() { val apiClient =

    ApiClientMock() apiClient.mock = { User("test") } val user = UserRepository(apiClient).create() assertEquals("test", user.id) } @Test fun testFailed() { val apiClient = ApiClientMock() apiClient.mock = { throw ExpectedException() } try { UserRepository(apiClient).create() fail() } catch (e: ExpectedException) { // Expected } } ςελϒϧͳઃܭ

31. ©2021 Wantedly, Inc. @Test fun test() { val apiClient =

    ApiClientMock() apiClient.mock = { User("test") } val user = UserRepository(apiClient).create() assertEquals("test", user.id) } @Test fun testFailed() { val apiClient = ApiClientMock() apiClient.mock = { throw ExpectedException() } try { UserRepository(apiClient).create() fail() } catch (e: ExpectedException) { // Expected } } ςελϒϧͳઃܭ NPDLϓϩύςΟʹϥϜμΛೖΕͯϞοΫ͢Δ

32. ©2021 Wantedly, Inc. @Test fun test() { val apiClient =

    ApiClientMock() apiClient.mock = { User("test") } val user = UserRepository(apiClient).create() assertEquals("test", user.id) } @Test fun testFailed() { val apiClient = ApiClientMock() apiClient.mock = { throw ExpectedException() } try { UserRepository(apiClient).create() fail() } catch (e: ExpectedException) { // Expected } } ςελϒϧͳઃܭ .PDLΛ஫ೖɺNPDL͕࢖ΘΕΔ

33. ©2021 Wantedly, Inc. @Test fun test() { val apiClient =

    ApiClientMock() apiClient.mock = { User("test") } val user = UserRepository(apiClient).create() assertEquals("test", user.id) } @Test fun testFailed() { val apiClient = ApiClientMock() apiClient.mock = { throw ExpectedException() } try { UserRepository(apiClient).create() fail() } catch (e: ExpectedException) { // Expected } } ςελϒϧͳઃܭ .PDLͷ಺༰͔Βظ଴͞ΕΔ݁ՌΛςετ

34. ©2021 Wantedly, Inc. @Test fun test() { val apiClient =

    ApiClientMock() apiClient.mock = { User("test") } val user = UserRepository(apiClient).create() assertEquals("test", user.id) } @Test fun testFailed() { val apiClient = ApiClientMock() apiClient.mock = { throw ExpectedException() } try { UserRepository(apiClient).create() fail() } catch (e: ExpectedException) { // Expected } } ςελϒϧͳઃܭ ྫ֎͕ى͖ͨͱ͖ͷςετ΋༰қʹ

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