| /* |
| * Copyright (C) 2016 The Dagger Authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package dagger.android; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static org.junit.Assert.fail; |
| import static org.robolectric.annotation.LooperMode.Mode.LEGACY; |
| |
| import android.app.Activity; |
| import android.app.Application; |
| import android.app.Fragment; |
| import android.os.Build; |
| import androidx.test.ext.junit.runners.AndroidJUnit4; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.robolectric.Robolectric; |
| import org.robolectric.annotation.Config; |
| import org.robolectric.annotation.LooperMode; |
| import org.robolectric.util.FragmentTestUtil; |
| |
| @LooperMode(LEGACY) |
| @RunWith(AndroidJUnit4.class) |
| // Robolectric requires Java9 to run API 29 and above, so use API 28 instead |
| @Config(sdk = Build.VERSION_CODES.P) |
| public final class AndroidInjectionTest { |
| |
| // Most positive tests are performed in javatests/dagger/android/support/functional, but |
| // Robolectric's support for framework fragments is lacking, so we supplement those tests here: |
| public static class InjectableFragment extends Fragment { |
| String tag; |
| } |
| |
| private static AndroidInjector<Object> fakeFragmentInjector(String tag) { |
| return instance -> { |
| if (instance instanceof InjectableFragment) { |
| ((InjectableFragment) instance).tag = tag; |
| } |
| }; |
| } |
| |
| public static class ApplicationInjectsFragment extends Application implements HasAndroidInjector { |
| @Override |
| public AndroidInjector<Object> androidInjector() { |
| return fakeFragmentInjector("injected by app"); |
| } |
| } |
| |
| @Config(application = ApplicationInjectsFragment.class) |
| @Test |
| public void fragmentInjectedByApplication() { |
| Activity activity = Robolectric.setupActivity(Activity.class); |
| InjectableFragment fragment = new InjectableFragment(); |
| activity.getFragmentManager().beginTransaction().add(fragment, "tag").commit(); |
| |
| AndroidInjection.inject(fragment); |
| |
| assertThat(fragment.tag).isEqualTo("injected by app"); |
| } |
| |
| public static class ActivityInjectsFragment extends Activity implements HasAndroidInjector { |
| @Override |
| public AndroidInjector<Object> androidInjector() { |
| return fakeFragmentInjector("injected by activity"); |
| } |
| } |
| |
| @Config(application = ApplicationInjectsFragment.class) |
| @Test |
| public void fragmentInjectedByActivity() { |
| ActivityInjectsFragment activity = Robolectric.setupActivity(ActivityInjectsFragment.class); |
| InjectableFragment fragment = new InjectableFragment(); |
| activity.getFragmentManager().beginTransaction().add(fragment, "tag").commit(); |
| |
| AndroidInjection.inject(fragment); |
| |
| assertThat(fragment.tag).isEqualTo("injected by activity"); |
| } |
| |
| public static class ParentFragmentInjectsChildFragment extends Fragment |
| implements HasAndroidInjector { |
| @Override |
| public AndroidInjector<Object> androidInjector() { |
| return fakeFragmentInjector("injected by parent fragment"); |
| } |
| } |
| |
| @Config(application = ApplicationInjectsFragment.class) |
| @Test |
| public void fragmentInjectedByParentFragment() { |
| ActivityInjectsFragment activity = Robolectric.setupActivity(ActivityInjectsFragment.class); |
| ParentFragmentInjectsChildFragment parentFragment = new ParentFragmentInjectsChildFragment(); |
| InjectableFragment childFragment = new InjectableFragment(); |
| |
| activity.getFragmentManager().beginTransaction().add(parentFragment, "tag").commit(); |
| parentFragment |
| .getChildFragmentManager() |
| .beginTransaction() |
| .add(childFragment, "child-tag") |
| .commit(); |
| AndroidInjection.inject(childFragment); |
| |
| assertThat(childFragment.tag).isEqualTo("injected by parent fragment"); |
| } |
| |
| @Test |
| public void injectActivity_applicationDoesntImplementHasAndroidInjector() { |
| Activity activity = Robolectric.setupActivity(Activity.class); |
| |
| try { |
| AndroidInjection.inject(activity); |
| fail(); |
| } catch (Exception e) { |
| assertThat(e) |
| .hasMessageThat() |
| .contains("Application does not implement dagger.android.HasAndroidInjector"); |
| } |
| } |
| |
| @Test |
| public void injectFragment_hasFragmentInjectorNotFound() { |
| Fragment fragment = new Fragment(); |
| FragmentTestUtil.startFragment(fragment); |
| |
| try { |
| AndroidInjection.inject(fragment); |
| fail(); |
| } catch (Exception e) { |
| assertThat(e).hasMessageThat().contains("No injector was found"); |
| } |
| } |
| |
| private static class ApplicationReturnsNull extends Application implements HasAndroidInjector { |
| @Override |
| public AndroidInjector<Object> androidInjector() { |
| return null; |
| } |
| } |
| |
| @Test |
| @Config(application = ApplicationReturnsNull.class) |
| public void activityInjector_returnsNull() { |
| Activity activity = Robolectric.setupActivity(Activity.class); |
| |
| try { |
| AndroidInjection.inject(activity); |
| fail(); |
| } catch (Exception e) { |
| assertThat(e).hasMessageThat().contains("androidInjector() returned null"); |
| } |
| } |
| |
| @Test |
| @Config(application = ApplicationReturnsNull.class) |
| public void fragmentInjector_returnsNull() { |
| Fragment fragment = new Fragment(); |
| FragmentTestUtil.startFragment(fragment); |
| |
| try { |
| AndroidInjection.inject(fragment); |
| fail(); |
| } catch (Exception e) { |
| assertThat(e).hasMessageThat().contains("androidInjector() returned null"); |
| } |
| } |
| |
| @Test |
| public void injectActivity_nullInput() { |
| try { |
| AndroidInjection.inject((Activity) null); |
| fail(); |
| } catch (NullPointerException e) { |
| assertThat(e).hasMessageThat().contains("activity"); |
| } |
| } |
| |
| @Test |
| public void injectFragment_nullInput() { |
| try { |
| AndroidInjection.inject((Fragment) null); |
| fail(); |
| } catch (NullPointerException e) { |
| assertThat(e).hasMessageThat().contains("fragment"); |
| } |
| } |
| } |