| /* |
| * Copyright 2018 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 androidx.fragment.app |
| |
| import android.os.Bundle |
| import androidx.fragment.app.test.EmptyFragmentTestActivity |
| import androidx.fragment.test.R |
| import androidx.lifecycle.Lifecycle |
| import androidx.lifecycle.LifecycleEventObserver |
| import androidx.lifecycle.LifecycleOwner |
| import androidx.lifecycle.LifecycleRegistry |
| import androidx.test.core.app.ActivityScenario |
| import androidx.test.ext.junit.runners.AndroidJUnit4 |
| import androidx.test.filters.LargeTest |
| import androidx.testutils.withActivity |
| import com.google.common.truth.Truth.assertThat |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| |
| @RunWith(AndroidJUnit4::class) |
| @LargeTest |
| class FragmentArchLifecycleTest { |
| |
| @Test |
| fun testFragmentAdditionDuringOnStop() { |
| with(ActivityScenario.launch(EmptyFragmentTestActivity::class.java)) { |
| val fm = withActivity { supportFragmentManager } |
| val activityLifecycle = withActivity { lifecycle } |
| |
| val first = Fragment() |
| val second = Fragment() |
| fm.beginTransaction().add(first, "first").commit() |
| executePendingTransactions() |
| first.lifecycle.addObserver(object : LifecycleEventObserver { |
| override fun onStateChanged(source: LifecycleOwner, event: Lifecycle.Event) { |
| if (event == Lifecycle.Event.ON_STOP) { |
| fm.beginTransaction().add(second, "second").commitNow() |
| first.lifecycle.removeObserver(this) |
| } |
| } |
| }) |
| onActivity { |
| it.onSaveInstanceState(Bundle()) |
| } |
| assertThat(first.lifecycle.currentState).isEqualTo(Lifecycle.State.CREATED) |
| assertThat(second.lifecycle.currentState).isEqualTo(Lifecycle.State.CREATED) |
| assertThat(activityLifecycle.currentState).isEqualTo(Lifecycle.State.CREATED) |
| } |
| } |
| |
| @Test |
| fun testNestedFragmentLifecycle() { |
| with(ActivityScenario.launch(FragmentArchLifecycleActivity::class.java)) { |
| |
| val parent = withActivity { |
| supportFragmentManager.findFragmentById(R.id.content) |
| as NestedLifecycleFragmentParent |
| } |
| val collectedEvents = parent.collectedEvents |
| |
| assertThat(collectedEvents) |
| .containsExactly( |
| // TODO b/127528777 Properly nest ON_CREATE callbacks |
| "child" to Lifecycle.Event.ON_CREATE, |
| "parent" to Lifecycle.Event.ON_CREATE, |
| |
| "parent" to Lifecycle.Event.ON_START, |
| "child" to Lifecycle.Event.ON_START, |
| |
| "parent" to Lifecycle.Event.ON_RESUME, |
| "child" to Lifecycle.Event.ON_RESUME |
| ) |
| .inOrder() |
| |
| // Now test the downward events |
| collectedEvents.clear() |
| |
| moveToState(Lifecycle.State.DESTROYED) |
| |
| assertThat(collectedEvents) |
| .containsExactly( |
| "child" to Lifecycle.Event.ON_PAUSE, |
| "parent" to Lifecycle.Event.ON_PAUSE, |
| |
| "child" to Lifecycle.Event.ON_STOP, |
| "parent" to Lifecycle.Event.ON_STOP, |
| |
| "child" to Lifecycle.Event.ON_DESTROY, |
| "parent" to Lifecycle.Event.ON_DESTROY |
| ) |
| .inOrder() |
| } |
| } |
| |
| @Test |
| fun testNestedFragmentLifecycleOnRemove() { |
| with(ActivityScenario.launch(FragmentArchLifecycleActivity::class.java)) { |
| |
| val fm = withActivity { supportFragmentManager } |
| val parent = withActivity { |
| fm.findFragmentById(R.id.content) as NestedLifecycleFragmentParent |
| } |
| val collectedEvents = parent.collectedEvents |
| |
| assertThat(collectedEvents) |
| .containsExactly( |
| // TODO b/127528777 Properly nest ON_CREATE callbacks |
| "child" to Lifecycle.Event.ON_CREATE, |
| "parent" to Lifecycle.Event.ON_CREATE, |
| |
| "parent" to Lifecycle.Event.ON_START, |
| "child" to Lifecycle.Event.ON_START, |
| |
| "parent" to Lifecycle.Event.ON_RESUME, |
| "child" to Lifecycle.Event.ON_RESUME |
| ) |
| .inOrder() |
| |
| // Now test the downward events |
| collectedEvents.clear() |
| |
| fm.beginTransaction() |
| .remove(parent) |
| .commit() |
| executePendingTransactions() |
| |
| assertThat(collectedEvents) |
| .containsExactly( |
| "child" to Lifecycle.Event.ON_PAUSE, |
| "parent" to Lifecycle.Event.ON_PAUSE, |
| |
| "child" to Lifecycle.Event.ON_STOP, |
| "parent" to Lifecycle.Event.ON_STOP, |
| |
| "child" to Lifecycle.Event.ON_DESTROY, |
| "parent" to Lifecycle.Event.ON_DESTROY |
| ) |
| .inOrder() |
| } |
| } |
| |
| @Test |
| fun testOverriddenLifecycleFragment() { |
| with(ActivityScenario.launch(EmptyFragmentTestActivity::class.java)) { |
| val fm = withActivity { supportFragmentManager } |
| |
| val fragment = OverriddenLifecycleFragment() |
| fm.beginTransaction().add(fragment, "lifecycle").commit() |
| executePendingTransactions() |
| // This should not crash or hang |
| moveToState(Lifecycle.State.DESTROYED) |
| } |
| } |
| } |
| |
| class FragmentArchLifecycleActivity : FragmentActivity(R.layout.activity_content) { |
| override fun onCreate(savedInstanceState: Bundle?) { |
| super.onCreate(savedInstanceState) |
| if (savedInstanceState == null) { |
| supportFragmentManager.beginTransaction() |
| .add(R.id.content, NestedLifecycleFragmentParent()) |
| .commitNow() |
| } |
| } |
| } |
| |
| class NestedLifecycleFragmentParent : StrictFragment() { |
| val collectedEvents = mutableListOf<Pair<String, Lifecycle.Event>>() |
| |
| init { |
| lifecycle.addObserver(LifecycleEventObserver { _, event -> |
| collectedEvents.add("parent" to event) |
| }) |
| } |
| |
| override fun onCreate(savedInstanceState: Bundle?) { |
| super.onCreate(savedInstanceState) |
| if (savedInstanceState == null) { |
| childFragmentManager.beginTransaction() |
| .add(StrictFragment(), "child") |
| .commitNow() |
| } |
| } |
| |
| override fun onAttachFragment(childFragment: Fragment) { |
| super.onAttachFragment(childFragment) |
| childFragment.lifecycle.addObserver(LifecycleEventObserver { _, event -> |
| collectedEvents.add("child" to event) |
| }) |
| } |
| } |
| |
| class OverriddenLifecycleFragment : Fragment() { |
| |
| private val lifecycleRegistry = LifecycleRegistry(this) |
| |
| override fun getLifecycle(): Lifecycle { |
| return lifecycleRegistry |
| } |
| |
| override fun onCreate(savedInstanceState: Bundle?) { |
| super.onCreate(savedInstanceState) |
| lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE) |
| } |
| |
| override fun onStart() { |
| super.onStart() |
| lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START) |
| } |
| |
| override fun onResume() { |
| super.onResume() |
| lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_RESUME) |
| } |
| |
| override fun onPause() { |
| lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_PAUSE) |
| super.onPause() |
| } |
| |
| override fun onStop() { |
| lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_STOP) |
| super.onStop() |
| } |
| |
| override fun onDestroy() { |
| lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY) |
| super.onDestroy() |
| } |
| } |