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/*
* 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 org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.annotation.Config;
import org.robolectric.annotation.LooperMode;
import org.robolectric.util.FragmentTestUtil;
@LooperMode(LEGACY)
@RunWith(RobolectricTestRunner.class)
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");
}
}
}
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