1 /*
2  * Copyright (C) 2021 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package android.content;
18 
19 import static android.content.ComponentCallbacks2.TRIM_MEMORY_BACKGROUND;
20 
21 import static com.google.common.truth.Truth.assertThat;
22 
23 import android.app.WindowConfiguration;
24 import android.content.res.Configuration;
25 import android.graphics.Rect;
26 
27 import androidx.annotation.NonNull;
28 import androidx.test.ext.junit.runners.AndroidJUnit4;
29 import androidx.test.filters.SmallTest;
30 
31 import org.junit.Before;
32 import org.junit.Test;
33 import org.junit.runner.RunWith;
34 
35 /**
36  *  Build/Install/Run:
37  *   atest FrameworksCoreTests:ComponentCallbacksControllerTest
38  */
39 @SmallTest
40 @RunWith(AndroidJUnit4.class)
41 public class ComponentCallbacksControllerTest {
42     private ComponentCallbacksController mController;
43 
44     @Before
setUp()45     public void setUp() {
46         mController = new ComponentCallbacksController();
47     }
48 
49     @Test
testUnregisterCallbackWithoutRegistrationNoCrash()50     public void testUnregisterCallbackWithoutRegistrationNoCrash() {
51         mController.unregisterCallbacks(new FakeComponentCallbacks());
52     }
53 
54     @Test
testDispatchWithEmptyCallbacksNoCrash()55     public void testDispatchWithEmptyCallbacksNoCrash() {
56         mController.dispatchConfigurationChanged(new Configuration());
57         mController.dispatchLowMemory();
58         mController.dispatchTrimMemory(TRIM_MEMORY_BACKGROUND);
59     }
60 
61     @Test
testClearCallbacksNoCrash()62     public void testClearCallbacksNoCrash() {
63         mController.clearCallbacks();
64     }
65 
66     @Test
testDispatchTrimMemoryWithoutComponentCallbacks2NoCrash()67     public void testDispatchTrimMemoryWithoutComponentCallbacks2NoCrash() {
68         // Register a ComponentCallbacks instead of ComponentCallbacks2
69         mController.registerCallbacks(new FakeComponentCallbacks());
70 
71         mController.dispatchTrimMemory(TRIM_MEMORY_BACKGROUND);
72     }
73 
74     @Test
testDispatchConfigurationChanged()75     public void testDispatchConfigurationChanged() throws Exception {
76         final TestComponentCallbacks2 callback = new TestComponentCallbacks2();
77         mController.registerCallbacks(callback);
78 
79         final Configuration config = new Configuration();
80         config.windowConfiguration.setWindowingMode(WindowConfiguration.WINDOWING_MODE_FREEFORM);
81         config.windowConfiguration.setBounds(new Rect(0, 0, 100, 100));
82 
83         mController.dispatchConfigurationChanged(config);
84 
85         assertThat(callback.mConfiguration).isEqualTo(config);
86 
87         mController.dispatchConfigurationChanged(Configuration.EMPTY);
88 
89         assertThat(callback.mConfiguration).isEqualTo(Configuration.EMPTY);
90     }
91 
92     @Test
testDispatchLowMemory()93     public void testDispatchLowMemory() {
94         final TestComponentCallbacks2 callback = new TestComponentCallbacks2();
95         mController.registerCallbacks(callback);
96 
97         mController.dispatchLowMemory();
98 
99         assertThat(callback.mLowMemoryCalled).isTrue();
100     }
101 
102     @Test
testDispatchTrimMemory()103     public void testDispatchTrimMemory() {
104         final TestComponentCallbacks2 callback = new TestComponentCallbacks2();
105         mController.registerCallbacks(callback);
106 
107         mController.dispatchTrimMemory(TRIM_MEMORY_BACKGROUND);
108 
109         assertThat(callback.mLevel).isEqualTo(TRIM_MEMORY_BACKGROUND);
110     }
111 
112     private static class FakeComponentCallbacks implements ComponentCallbacks {
113         @Override
onConfigurationChanged(@onNull Configuration newConfig)114         public void onConfigurationChanged(@NonNull Configuration newConfig) {}
115 
116         @Override
onLowMemory()117         public void onLowMemory() {}
118     }
119 }
120