Mocking Kotlin with MockK

Transcript

1. KOTLIN'DE MOCKLAMA
   VE MOCKK
   

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2. BEN KIMIM
   ➤ Lead Android Dev @CizitzenMe
   ➤ https://haditok.com
   

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3. UNIT TESTING NEDIR?
   ➤ Unit: En küçük test edilebilir birim (Class, Function)
   ➤ Birimler diğer birimlerden bağımısız olarak test edilir.
   ➤ Diğer birimler Mock veya Fake ile değiştirilir.
   

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4. TEST EDILEBILIR KOD
   ➤ Separations of concerns
   ➤ Dependency injection
   ➤ Clean code
   

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5. FAKE
   ➤ Anlamı: Sahte
   ➤ Daha önceden belirlenmiş değerleri dönerek kontrollü bir
   ortam sağlama
   

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6. MOCKING NEDIR?
   Kuzey Alaycı kuşu (Mimus polyglottos)
   

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7. MOCK
   ➤ Anlamı: Taklit, Alay
   ➤ Unit testlerde test ettiğimiz birimin ihtiyacı olan objeleri
   objeleri taklit ederek, bu objeler üzerinde tam kontrol sağlar
   

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8. NELERI KONTROL EDIYORUZ?
   ➤ Değişken ve fonksiyonların döneceği değerleri
   ➤ Fonksiyonların doğru parametreler ile çağırılıp çağrılmadığını
   

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9. NEDEN MOCKK
   ➤ Saf Kotlin için bir framework
   ➤ Domain Specific Language(DSL)
   

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10. data class User(val userId: String, val userName: String)
    

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11. data class User(val userId: String, val userName: String)
    interface UserApi {
    fun deleteUser(userId: String): Boolean
    }
    

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12. data class User(val userId: String, val userName: String)
    interface UserApi {
    fun deleteUser(userId: String): Boolean
    }
    class UserManager(private val userApi: UserApi) {
    fun deleteUser(user: User): Boolean {
    return userApi.deleteUser(user.userId)
    }
    }
    

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13. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    }
    

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14. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    }
    

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15. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    }
    

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16. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    every { userApi.deleteUser(userId) } returns true
    }
    

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17. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    every { userApi.deleteUser(userId) } returns true
    val result = userManager.deleteUser(user)
    }
    

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18. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    every { userApi.deleteUser(userId) } returns true
    val result = userManager.deleteUser(user)
    assert(result).toBe(true)
    }
    

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19. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    every { userApi.deleteUser(userId) } returns true
    val result = userManager.deleteUser(user)
    assert(result).toBe(true)
    verify { userApi.deleteUser(userId) }
    }
    

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20. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    every { userApi.deleteUser(userId) } returns true
    val result = userManager.deleteUser(user)
    assert(result).toBe(true)
    verify { userApi.deleteUser(match { it.startsWith("12") }) }
    }
    

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21. @Test
    fun basicTest() {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    every { userApi.deleteUser(userId) } returns true
    val result = userManager.deleteUser(user)
    assert(result).toBe(true)
    verify { userApi.deleteUser(any()) }
    }
    

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22. @MockK
    lateinit var userApi: UserApi
    @MockK
    lateinit var user: User
    val userId = “123"
    lateinit var userManager:UserManager
    @Before
    fun initTests() {
    MockKAnnotations.init(this)
    userManager = UserManager(userApi)
    every { user.userId } returns userId
    }
    @Test
    fun basicTest() {
    every { userApi.deleteUser(userId) } returns true
    val result = userManager.deleteUser(user)
    assert(result).toBe(true)
    verify { userApi.deleteUser(userId) }
    }
    

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23. OBJECT MOCK
    

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24. object Calculator {
    fun add(first: Int, second: Int) = first + second
    }
    

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25. object Calculator {
    fun add(first: Int, second: Int) = first + second
    }
    @Test
    fun objectMock() {
    val result = Calculator.add(1, 2)
    assert(result).toBe(3)
    }
    

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26. object Calculator {
    fun add(first: Int, second: Int) = first + second
    }
    @Test
    fun objectMock() {
    val result = Calculator.add(1, 2)
    assert(result).toBe(3)
    mockkObject(Calculator)
    }
    

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27. object Calculator {
    fun add(first: Int, second: Int) = first + second
    }
    @Test
    fun objectMock() {
    val result = Calculator.add(1, 2)
    assert(result).toBe(3)
    mockkObject(Calculator)
    every { Calculator.add(1, 2) } returns 42
    }
    

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28. object Calculator {
    fun add(first: Int, second: Int) = first + second
    }
    @Test
    fun objectMock() {
    val result = Calculator.add(1, 2)
    assert(result).toBe(3)
    mockkObject(Calculator)
    every { Calculator.add(1, 2) } returns 41
    val mockedResult = Calculator.add(1, 2)
    }
    

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29. object Calculator {
    fun add(first: Int, second: Int) = first + second
    }
    @Test
    fun objectMock() {
    val result = Calculator.add(1, 2)
    assert(result).toBe(3)
    mockkObject(Calculator)
    every { Calculator.add(1, 2) } returns 41
    val mockedResult = Calculator.add(1, 2)
    assert(mockedResult).toBe(42)
    }
    

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30. STATIC MOCK
    

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31. public class CalculatorStatic {
    static int add(int first, int second){
    return first+second;
    }
    }
    

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32. @Test
    fun staticMock() {
    val result = CalculatorStatic.add(1, 2)
    assert(result).toBe(3)
    }
    

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33. @Test
    fun staticMock() {
    val result = CalculatorStatic.add(1, 2)
    assert(result).toBe(3)
    mockkStatic(CalculatorStatic ::class)
    }
    

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34. @Test
    fun staticMock() {
    val result = CalculatorStatic.add(1, 2)
    assert(result).toBe(3)
    mockkStatic(CalculatorStatic ::class)
    every { CalculatorStatic.add(1, 2) } returns 42
    }
    

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35. @Test
    fun staticMock() {
    val result = CalculatorStatic.add(1, 2)
    assert(result).toBe(3)
    mockkStatic(CalculatorStatic ::class)
    every { CalculatorStatic.add(1, 2) } returns 41
    val mockedResult = CalculatorStatic.add(1, 2)
    }
    

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36. @Test
    fun staticMock() {
    val result = CalculatorStatic.add(1, 2)
    assert(result).toBe(3)
    mockkStatic(CalculatorStatic ::class)
    every { CalculatorStatic.add(1, 2) } returns 41
    val mockedResult = CalculatorStatic.add(1, 2)
    assert(mockedResult).toBe(42)
    }
    

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37. COROUTINES
    

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38. data class User(val userId: String, val userName: String)
    interface UserApi {
    suspend fun deleteUser(userId: String): Boolean
    }
    

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39. data class User(val userId: String, val userName: String)
    interface UserApi {
    suspend fun deleteUser(userId: String): Boolean
    }
    class UserManager(private val userApi: UserApi) {
    suspend fun deleteUser(user: User): Boolean {
    return userApi.deleteUser(user.userId)
    }
    }
    

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40. @Test
    fun basicTest() = runBlocking {
    }
    

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41. @Test
    fun basicTest() = runBlocking {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    }
    

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42. @Test
    fun basicTest() = runBlocking {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = "123"
    val user: User = mockk()
    every { user.userId } returns userId
    coEvery { userApi.deleteUser(userId) } returns true
    }
    

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43. @Test
    fun basicTest() = runBlocking {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = “123"
    val user: User = mockk()
    every { user.userId } returns userId
    coEvery { userApi.deleteUser(userId) } returns true
    val result = userManager.deleteUser(user)
    }
    

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44. @Test
    fun basicTest() = runBlocking {
    val userApi: UserApi = mockk()
    val userManager = UserManager(userApi)
    val userId = “123"
    val user: User = mockk()
    every { user.userId } returns userId
    coEvery { userApi.deleteUser(userId) } returns true
    val result = userManager.deleteUser(user)
    assert(result).toBe(true)
    coVerify { userApi.deleteUser(userId) }
    }
    

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45. LIMITASYONLAR
    ➤ final static
    ➤ inline fonksiyonlar
    

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46. UNIT TESTS WITHOUT INTEGRATION TESTS (ZORUNLU GIF)
    

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47. TEŞEKKÜRLER
    HTTPS://MOCKK.IO/
    

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