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[Settings] Code refactor for Lifecycle listening

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This is an abstract class for building a set of callback behavior
based on Lifecycle status change.

Through extending this class, the implemented methods are invoked
only when required.

Bug: 229689535
Test: unit test
Change-Id: I7534393546f821738a63ebde121a5a88ee03b23b
(cherry picked from commit 9a4c66d23b)
This commit is contained in:
Bonian Chen
2022-04-19 13:00:52 +08:00
parent 8cb0439d9c
commit 37a326bd3e
2 changed files with 211 additions and 0 deletions
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111
tests/unit/src/com/android/settings/network/helper/LifecycleCallbackAdapterTest.java Normal file
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/*
* Copyright (C) 2022 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 com.android.settings.network.helper;
import static com.google.common.truth.Truth.assertThat;
import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.LifecycleOwner;
import androidx.lifecycle.LifecycleRegistry;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(AndroidJUnit4.class)
public class LifecycleCallbackAdapterTest implements LifecycleOwner {
private final LifecycleRegistry mRegistry = LifecycleRegistry.createUnsafe(this);
private TestObj mTarget;
@Before
public void setUp() {
mTarget = new TestObj(getLifecycle());
}
public Lifecycle getLifecycle() {
return mRegistry;
}
@Test
public void lifecycle_get_lifecycleToMonitor() {
assertThat(mTarget.getLifecycle()).isEqualTo(mRegistry);
}
@Test
public void lifecycle_stateChangeToStart_callbackActive() {
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE);
assertThat(mTarget.getCallbackCount()).isEqualTo(0);
assertThat(mTarget.isCallbackActive()).isEqualTo(Boolean.FALSE);
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START);
assertThat(mTarget.getCallbackCount()).isEqualTo(1);
assertThat(mTarget.isCallbackActive()).isEqualTo(Boolean.TRUE);
}
@Test
public void lifecycle_stateChangeToStop_callbackInActive() {
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE);
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START);
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_STOP);
assertThat(mTarget.getCallbackCount()).isEqualTo(2);
assertThat(mTarget.isCallbackActive()).isEqualTo(Boolean.FALSE);
}
@Test
public void lifecycle_stateChangeToDestroy_noFurtherActive() {
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE);
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START);
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_STOP);
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY);
assertThat(mTarget.getCallbackCount()).isEqualTo(2);
assertThat(mTarget.isCallbackActive()).isEqualTo(Boolean.FALSE);
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE);
mRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START);
assertThat(mTarget.getCallbackCount()).isEqualTo(2);
assertThat(mTarget.isCallbackActive()).isEqualTo(Boolean.FALSE);
}
public static class TestObj extends LifecycleCallbackAdapter {
boolean mIsActive;
int mNumberOfCallback;
public TestObj(Lifecycle lifecycle) {
super(lifecycle);
}
public boolean isCallbackActive() {
return mIsActive;
}
public void setCallbackActive(boolean isActive) {
mIsActive = isActive;
mNumberOfCallback ++;
}
protected int getCallbackCount() {
return mNumberOfCallback;
}
}
}