| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 android.arch.lifecycle; |
| |
| import static android.arch.lifecycle.Lifecycle.Event.ON_CREATE; |
| import static android.arch.lifecycle.Lifecycle.Event.ON_DESTROY; |
| import static android.arch.lifecycle.Lifecycle.Event.ON_PAUSE; |
| import static android.arch.lifecycle.Lifecycle.Event.ON_RESUME; |
| import static android.arch.lifecycle.Lifecycle.Event.ON_START; |
| import static android.arch.lifecycle.Lifecycle.Event.ON_STOP; |
| |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.hamcrest.Matchers.is; |
| |
| import static java.util.Arrays.asList; |
| |
| import android.arch.lifecycle.activity.EmptyActivity; |
| import android.arch.lifecycle.extensions.test.R; |
| import android.support.test.annotation.UiThreadTest; |
| import android.support.test.filters.MediumTest; |
| import android.support.test.rule.ActivityTestRule; |
| import android.support.test.runner.AndroidJUnit4; |
| import android.support.v4.app.Fragment; |
| import android.support.v4.app.FragmentManager; |
| |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| @MediumTest |
| @RunWith(AndroidJUnit4.class) |
| public class FragmentOperationsLifecycleTest { |
| |
| @Rule |
| public ActivityTestRule<EmptyActivity> mActivityTestRule = new ActivityTestRule<>( |
| EmptyActivity.class); |
| |
| @Test |
| @UiThreadTest |
| public void addRemoveFragment() { |
| EmptyActivity activity = mActivityTestRule.getActivity(); |
| Fragment fragment = new Fragment(); |
| FragmentManager fm = activity.getSupportFragmentManager(); |
| fm.beginTransaction().add(fragment, "tag").commitNow(); |
| CollectingObserver observer = observeAndCollectIn(fragment); |
| assertThat(observer.getEventsAndReset(), is(asList(ON_CREATE, ON_START, ON_RESUME))); |
| fm.beginTransaction().remove(fragment).commitNow(); |
| assertThat(observer.getEventsAndReset(), is(asList(ON_PAUSE, ON_STOP, ON_DESTROY))); |
| fm.beginTransaction().add(fragment, "tag").commitNow(); |
| assertThat(observer.getEventsAndReset(), is(asList(ON_CREATE, ON_START, ON_RESUME))); |
| } |
| |
| @Test |
| @UiThreadTest |
| public void fragmentInBackstack() { |
| EmptyActivity activity = mActivityTestRule.getActivity(); |
| Fragment fragment1 = new Fragment(); |
| FragmentManager fm = activity.getSupportFragmentManager(); |
| fm.beginTransaction().add(R.id.fragment_container, fragment1, "tag").addToBackStack(null) |
| .commit(); |
| fm.executePendingTransactions(); |
| CollectingObserver observer1 = observeAndCollectIn(fragment1); |
| assertThat(observer1.getEventsAndReset(), is(asList(ON_CREATE, ON_START, ON_RESUME))); |
| |
| Fragment fragment2 = new Fragment(); |
| fm.beginTransaction().replace(R.id.fragment_container, fragment2).addToBackStack(null) |
| .commit(); |
| fm.executePendingTransactions(); |
| |
| CollectingObserver observer2 = observeAndCollectIn(fragment2); |
| assertThat(observer1.getEventsAndReset(), is(asList(ON_PAUSE, ON_STOP))); |
| assertThat(observer2.getEventsAndReset(), is(asList(ON_CREATE, ON_START, ON_RESUME))); |
| |
| assertThat(fm.popBackStackImmediate(), is(true)); |
| assertThat(observer1.getEventsAndReset(), is(asList(ON_START, ON_RESUME))); |
| assertThat(observer2.getEventsAndReset(), is(asList(ON_PAUSE, ON_STOP, ON_DESTROY))); |
| |
| assertThat(fm.popBackStackImmediate(), is(true)); |
| assertThat(observer1.getEventsAndReset(), is(asList(ON_PAUSE, ON_STOP, ON_DESTROY))); |
| } |
| |
| private static CollectingObserver observeAndCollectIn(Fragment fragment) { |
| CollectingObserver observer = new CollectingObserver(); |
| fragment.getLifecycle().addObserver(observer); |
| return observer; |
| } |
| |
| private static class CollectingObserver implements LifecycleObserver { |
| final List<Lifecycle.Event> mCollectedEvents = new ArrayList<>(); |
| |
| @OnLifecycleEvent(Lifecycle.Event.ON_ANY) |
| public void anyEvent(LifecycleOwner owner, Lifecycle.Event event) { |
| mCollectedEvents.add(event); |
| } |
| |
| List<Lifecycle.Event> getEventsAndReset() { |
| ArrayList<Lifecycle.Event> events = new ArrayList<>(mCollectedEvents); |
| mCollectedEvents.clear(); |
| return events; |
| } |
| } |
| } |