[Settings] Code refactor for Lifecycle listening

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
2022-04-19 13:00:52 +08:00
parent e086134e1b
commit 9a4c66d23b
2 changed files with 211 additions and 0 deletions
--- a/tests/unit/src/com/android/settings/network/helper/LifecycleCallbackAdapterTest.java
+++ b/tests/unit/src/com/android/settings/network/helper/LifecycleCallbackAdapterTest.java
@@ -0,0 +1,111 @@
+/*
+ * 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;
+        }
+    }
+}