Kotlinでテストコードを書く

Kotlinでテストコードを書く

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3. 3. android { sourceSets {
 main.java.srcDirs += 'src/main/kotlin'
 test.java.srcDirs += 'src/test/kotlin'
 androidTest.java.srcDirs += 'src/androidTest/kotlin'
 }
 }
4. 4. //ExampleUnitTest.java public class ExampleUnitTest { @Test public void addition_isCorrect() { assertEquals(4, 2 + 2); } }
5. 5. //ExampleUnitTest.kt class ExampleUnitTest { @Test fun addition_isCorrect() { assertEquals(4, 2 + 2) } }
6. 6. //app/build.gradle dependencies { testCompile 'org.mockito:mockito-core:1.10.19' }
7. 7. //KotlinSimpleMockitoTest.kt class KotlinSimpleMockitoTest { @Test fun Context () { val context = Mockito.mock(Context::class.java) Mockito.`when`(context.packageName).thenReturn("shoma2da") val packageName = context.getPackageName(); Assert.assertEquals("shoma2da", packageName); } }
8. 8. //User.kt class User(val birthYear:Int) { fun getAge() = 2016 - birthYear }
9. 9. //UserTest.kt class UserTest { @Test fun User () { val user = Mockito.mock(User::class.java) Mockito.`when`(user.getAge()).thenReturn(1) val age = user.getAge() Assert.assertEquals(1, age) } }
10. 10. //logcat org.mockito.exceptions.base.MockitoException: Cannot mock/spy class YOUR_PACKAGE.User Mockito cannot mock/spy following: - final classes - anonymous classes - primitive types
11. 11. open 

12. 12. //User.kt open class User(val birthYear:Int) { open fun getAge() = 2016 - birthYear }
13. 13. //User.kt interface User { fun getAge():Int } class UserImpl(val birthYear:Int) : User { override fun getAge() = 2016 - birthYear }
14. 14. //UserTest.kt @RunWith(PowerMockRunner::class) @PrepareForTest(User::class) class UserTest { @Test fun User () { val user = PowerMockito.mock(User::class.java) Mockito.`when`(user.getAge()).thenReturn(1) val age = user.getAge() Assert.assertEquals(1, age) } } //build.gradle dependencies { testCompile 'org.powermock:powermock-module-junit4:1.6.2'
 testCompile 'org.powermock:powermock-api-mockito:1.6.2' }
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