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Mock Partially @fushiroyama

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Android Testing Bootcamp • https://android-testing- bootcamp.connpass.com/ • https://android-testing- bootcamp.connpass.com/event/55274/

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TL;DR • Use Dagger2 • Make Partial Component • Use it as Component Dependency • Write Mock Module of that Component • Prepare Test Application class • Specify it in Custom Test Runner

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Normal Way

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Application Module @Module public class ApplicationModule { @Provides public Info providesInfo() { return Info.newInstance(); } @Provides public Auth providesAuth() { return Auth.newInstance(); } }

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Application Module @Module public class ApplicationModule { @Provides public Info providesInfo() { return Info.newInstance(); } @Provides public Auth providesAuth() { return Auth.newInstance(); } }

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Application Module @Module public class ApplicationModule { @Provides public Info providesInfo() { return Info.newInstance(); } @Provides public Auth providesAuth() { return Auth.newInstance(); } }

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Application Component @Component(modules = ApplicationModule.class) public interface ApplicationComponent { ActivityComponent plus(ActivityModule module); void inject(Foo foo); void inject(Bar bar); }

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Application Component @Component(modules = ApplicationModule.class) public interface ApplicationComponent { ActivityComponent plus(ActivityModule module); void inject(Foo foo); void inject(Bar bar); }

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Application Component @Component(modules = ApplicationModule.class) public interface ApplicationComponent { ActivityComponent plus(ActivityModule module); void inject(Foo foo); void inject(Bar bar); }

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My Application @Override public void onCreate() { super.onCreate(); applicationComponent = DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .build(); } public ApplicationComponent getApplicationComponent() { return applicationComponent; }

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My Application @Override public void onCreate() { super.onCreate(); applicationComponent = DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .build(); } public ApplicationComponent getApplicationComponent() { return applicationComponent; }

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My Application @Override public void onCreate() { super.onCreate(); applicationComponent = DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .build(); } public ApplicationComponent getApplicationComponent() { return applicationComponent; }

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Partial Mock

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Application Module @Module public class ApplicationModule { @Provides public Info providesInfo() { return Info.newInstance(); } @Provides public Auth providesAuth() { return Auth.newInstance(); } }

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Application Module @Module public class ApplicationModule { // removed }

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API Module @Module public class ApiModule { @Provides public Info providesInfo() { return Info.newInstance(); } @Provides public Auth providesAuth() { return Auth.newInstance(); } }

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API Module @Module public class ApiModule { @Provides public Info providesInfo() { return Info.newInstance(); } @Provides public Auth providesAuth() { return Auth.newInstance(); } }

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API Module @Module public class ApiModule { @Provides public Info providesInfo() { return Info.newInstance(); } @Provides public Auth providesAuth() { return Auth.newInstance(); } }

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API Component @Component(modules = ApiModule.class) public interface ApiComponent { Info getInfo(); Auth getAuth(); }

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API Component @Component(modules = ApiModule.class) public interface ApiComponent { Info getInfo(); Auth getAuth(); }

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API Component @Component(modules = ApiModule.class) public interface ApiComponent { Info getInfo(); Auth getAuth(); }

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API Component @Component(modules = ApiModule.class) public interface ApiComponent { Info getInfo(); Auth getAuth(); } /FDFTTBSZ

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Component Dependency

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Application Component @Component(modules = ApplicationModule.class) public interface ApplicationComponent { ActivityComponent plus(ActivityModule module); void inject(Foo foo); void inject(Bar bar); }

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Application Component @Component(modules = ApplicationModule.class) public interface ApplicationComponent { ActivityComponent plus(ActivityModule module); void inject(Foo foo); void inject(Bar bar); }

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Application Component @Component(modules = ApplicationModule.class, dependencies = ApiComponent.clas) public interface ApplicationComponent { ActivityComponent plus(ActivityModule module); void inject(Foo foo); void inject(Bar bar); }

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Application Component @Component(modules = ApplicationModule.class, dependencies = ApiComponent.clas) public interface ApplicationComponent { ActivityComponent plus(ActivityModule module); void inject(Foo foo); void inject(Bar bar); }

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Custom Application

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My Application @Override public void onCreate() { super.onCreate(); applicationComponent = DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .build(); } public ApplicationComponent getApplicationComponent() { return applicationComponent; }

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My Application @Override public void onCreate() { super.onCreate(); ApiComponent apiComponent = DaggerApiComponent.builder() .apiModule(new ApiModule()) .build(); applicationComponent = DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(apiComponent) .build(); } public ApplicationComponent getApplicationComponent() { return applicationComponent; }

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My Application @Override public void onCreate() { super.onCreate(); ApiComponent apiComponent = DaggerApiComponent.builder() .apiModule(new ApiModule()) .build(); applicationComponent = DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(apiComponent) .build(); } public ApplicationComponent getApplicationComponent() { return applicationComponent; }

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My Application @Override public void onCreate() { super.onCreate(); ApiComponent apiComponent = DaggerApiComponent.builder() .apiModule(new ApiModule()) .build(); applicationComponent = DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(apiComponent) .build(); } public ApplicationComponent getApplicationComponent() { return applicationComponent; }

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My Application @Override public void onCreate() { super.onCreate(); ApiComponent apiComponent = DaggerApiComponent.builder() .apiModule(new ApiModule()) .build(); applicationComponent = DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(apiComponent) .build(); } public ApplicationComponent getApplicationComponent() { return applicationComponent; }

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Mock API Module

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Mock API Module @Module public class MockApiModule { private final Auth mockAuthApi; private final Info mockInfoApi; public MockApiModule() { mockAuthApi = Mockito.mock(Auth.class); mockInfoApi = Mockito.mock(Info.class); } @Provides Info providesInfo() { return mockInfoApi; } @Provides public Auth providesAuth() { return mockAuthApi; } }

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Mock API Module @Module public class MockApiModule { private final Auth mockAuthApi; private final Info mockInfoApi; public MockApiModule() { mockAuthApi = Mockito.mock(Auth.class); mockInfoApi = Mockito.mock(Info.class); } @Provides Info providesInfo() { return mockInfoApi; } @Provides public Auth providesAuth() { return mockAuthApi; } }

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Mock API Component

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Mock API Component @Component(modules = MockApiModule.class) public interface MockApiComponent extends ApiComponent { }

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Mock API Component @Component(modules = MockApiModule.class) public interface MockApiComponent extends ApiComponent { }

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Mock API Component @Component(modules = MockApiModule.class) public interface MockApiComponent extends ApiComponent { }

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Test Application

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Test Application public class TestApplication extends MyApplication { @Override public ApplicationComponent getApplicationComponent() { MockApiComponent mockApiComponent = DaggerMockApiComponent.builder() .mockApiModule(new MockApiModule()) .build(); return DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(mockApiComponent) .build(); } }

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Test Application public class TestApplication extends MyApplication { @Override public ApplicationComponent getApplicationComponent() { MockApiComponent mockApiComponent = DaggerMockApiComponent.builder() .mockApiModule(new MockApiModule()) .build(); return DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(mockApiComponent) .build(); } }

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Test Application public class TestApplication extends MyApplication { @Override public ApplicationComponent getApplicationComponent() { MockApiComponent mockApiComponent = DaggerMockApiComponent.builder() .mockApiModule(new MockApiModule()) .build(); return DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(mockApiComponent) .build(); } }

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Test Application public class TestApplication extends MyApplication { @Override public ApplicationComponent getApplicationComponent() { MockApiComponent mockApiComponent = DaggerMockApiComponent.builder() .mockApiModule(new MockApiModule()) .build(); return DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(mockApiComponent) .build(); } }

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Test Application public class TestApplication extends MyApplication { private MockApiComponent mockApiComponent; @Override public ApplicationComponent getApplicationComponent() { mockApiComponent = DaggerMockApiComponent.builder() .mockApiModule(new MockApiModule()) .build(); return DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(mockApiComponent) .build(); } public MockApiComponent getMockApiComponent() { return mockApiComponent; } }

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Test Application public class TestApplication extends MyApplication { private MockApiComponent mockApiComponent; @Override public ApplicationComponent getApplicationComponent() { mockApiComponent = DaggerMockApiComponent.builder() .mockApiModule(new MockApiModule()) .build(); return DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(mockApiComponent) .build(); } public MockApiComponent getMockApiComponent() { return mockApiComponent; } }

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Test Application public class TestApplication extends MyApplication { private MockApiComponent mockApiComponent; @Override public ApplicationComponent getApplicationComponent() { mockApiComponent = DaggerMockApiComponent.builder() .mockApiModule(new MockApiModule()) .build(); return DaggerApplicationComponent.builder() .applicationModule(new ApplicationModule(this)) .apiComponent(mockApiComponent) .build(); } public MockApiComponent getMockApiComponent() { return mockApiComponent; } }

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Mock Test Runner

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Mock Test Runner public class MockTestRunner extends AndroidJUnitRunner { @Override public Application newApplication(ClassLoader cl, String className, Context context) throws InstantiationException, IllegalAccessException, ClassNotFoundException { String testApplicationClassName = TestApplication.class.getCanonicalName(); return super.newApplication(cl, testApplicationClassName, context); } }

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Mock Test Runner public class MockTestRunner extends AndroidJUnitRunner { @Override public Application newApplication(ClassLoader cl, String className, Context context) throws InstantiationException, IllegalAccessException, ClassNotFoundException { String testApplicationClassName = TestApplication.class.getCanonicalName(); return super.newApplication(cl, testApplicationClassName, context); } }

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Mock Test Runner public class MockTestRunner extends AndroidJUnitRunner { @Override public Application newApplication(ClassLoader cl, String className, Context context) throws InstantiationException, IllegalAccessException, ClassNotFoundException { String testApplicationClassName = TestApplication.class.getCanonicalName(); return super.newApplication(cl, testApplicationClassName, context); } }

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Write Your Test!

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Your Android Test @RunWith(AndroidJUnit4.class) public class YourAndroidTest { @Before public void setUp() throws Exception { TestApplication application = (TestApplication) InstrumentationRegistry.getTargetContext().getApplicationContext(); MockApiComponent mockApiComponent = application.getMockApiComponent(); Info info = mockApiComponent.getInfo(); when(info.access(any())).thenReturn(result); } @Test public void doYourTest() { } }

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Your Android Test @RunWith(AndroidJUnit4.class) public class YourAndroidTest { @Before public void setUp() throws Exception { TestApplication application = (TestApplication) InstrumentationRegistry.getTargetContext().getApplicationContext(); MockApiComponent mockApiComponent = application.getMockApiComponent(); Info info = mockApiComponent.getInfo(); when(info.access(any())).thenReturn(result); } @Test public void doYourTest() { } }

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Your Android Test @RunWith(AndroidJUnit4.class) public class YourAndroidTest { @Before public void setUp() throws Exception { TestApplication application = (TestApplication) InstrumentationRegistry.getTargetContext().getApplicationContext(); MockApiComponent mockApiComponent = application.getMockApiComponent(); Info info = mockApiComponent.getInfo(); when(info.access(any())).thenReturn(result); } @Test public void doYourTest() { } }

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Your Android Test @RunWith(AndroidJUnit4.class) public class YourAndroidTest { @Before public void setUp() throws Exception { TestApplication application = (TestApplication) InstrumentationRegistry.getTargetContext().getApplicationContext(); MockApiComponent mockApiComponent = application.getMockApiComponent(); Info info = mockApiComponent.getInfo(); when(info.access(any())).thenReturn(result); } @Test public void doYourTest() { } }

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Your Android Test @RunWith(AndroidJUnit4.class) public class YourAndroidTest { @Before public void setUp() throws Exception { TestApplication application = (TestApplication) InstrumentationRegistry.getTargetContext().getApplicationContext(); MockApiComponent mockApiComponent = application.getMockApiComponent(); Info info = mockApiComponent.getInfo(); when(info.access(any())).thenReturn(result); } @Test public void doYourTest() { } }

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Use Your Runner android { defaultConfig { testInstrumentationRunner "your.package.runner.MockTestRunner" } }

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Thank you!