Mock Partially using Dagger

How to mock partially using Dagger 2

Transcript

1. Mock Partially
   @fushiroyama
   

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

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3. 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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4. Normal Way
   

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

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

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

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8. 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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9. 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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10. 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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11. 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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12. 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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13. 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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14. Partial Mock
    

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

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

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

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

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

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

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

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

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

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24. Component Dependency
    

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25. 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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26. 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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27. 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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28. 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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29. Custom Application
    

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30. 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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31. 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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32. 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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33. 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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34. 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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35. Mock API Module
    

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36. 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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37. 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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38. Mock API Component
    

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

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

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

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42. Test Application
    

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43. 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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44. 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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45. 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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46. 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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47. 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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48. 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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49. 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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50. Mock Test Runner
    

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51. 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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52. 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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53. 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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54. Write Your Test!
    

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55. 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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56. 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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57. 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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58. 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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59. 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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60. Use Your Runner
    android {
    defaultConfig {
    testInstrumentationRunner "your.package.runner.MockTestRunner"
    }
    }
    

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61. Thank you!
    

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