1 /*
2  * Copyright (C) 2023 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 package com.android.quickstep;
17 
18 import static junit.framework.Assert.assertFalse;
19 import static junit.framework.Assert.assertTrue;
20 
21 import static org.mockito.ArgumentMatchers.anyInt;
22 import static org.mockito.Mockito.mock;
23 import static org.mockito.Mockito.never;
24 import static org.mockito.Mockito.times;
25 import static org.mockito.Mockito.verify;
26 import static org.mockito.Mockito.when;
27 
28 import android.content.Context;
29 import android.content.res.Resources;
30 
31 import androidx.test.filters.SmallTest;
32 
33 import com.android.launcher3.R;
34 import com.android.quickstep.util.TaskKeyCache;
35 
36 import org.junit.Before;
37 import org.junit.Test;
38 import org.mockito.Mock;
39 import org.mockito.MockitoAnnotations;
40 
41 import java.util.concurrent.Executor;
42 
43 @SmallTest
44 public class TaskThumbnailCacheTest {
45     @Mock
46     private Context mContext;
47 
48     @Mock
49     private Resources mResource;
50 
51     @Mock
52     private TaskKeyCache mTaskKeyCache;
53 
54     @Before
setup()55     public void setup() throws NoSuchFieldException {
56         MockitoAnnotations.initMocks(this);
57         when(mContext.getResources()).thenReturn(mResource);
58     }
59 
60     @Test
increaseCacheSize()61     public void increaseCacheSize() {
62         // Mock a cache size increase from 3 to 8
63         when(mTaskKeyCache.getMaxSize()).thenReturn(3);
64         when(mResource.getInteger((R.integer.recentsThumbnailCacheSize))).thenReturn(8);
65         TaskThumbnailCache thumbnailCache = new TaskThumbnailCache(mContext, mock(Executor.class),
66                 mTaskKeyCache);
67 
68         // Preload is needed when increasing size
69         assertTrue(thumbnailCache.updateCacheSizeAndRemoveExcess());
70         verify(mTaskKeyCache, times(1)).updateCacheSizeAndRemoveExcess(8);
71     }
72 
73     @Test
decreaseCacheSize()74     public void decreaseCacheSize() {
75         // Mock a cache size decrease from 8 to 3
76         when(mTaskKeyCache.getMaxSize()).thenReturn(8);
77         when(mResource.getInteger((R.integer.recentsThumbnailCacheSize))).thenReturn(3);
78         TaskThumbnailCache thumbnailCache = new TaskThumbnailCache(mContext, mock(Executor.class),
79                 mTaskKeyCache);
80         // Preload is not needed when decreasing size
81         assertFalse(thumbnailCache.updateCacheSizeAndRemoveExcess());
82         verify(mTaskKeyCache, times(1)).updateCacheSizeAndRemoveExcess(3);
83     }
84 
85     @Test
keepSameCacheSize()86     public void keepSameCacheSize() {
87         when(mTaskKeyCache.getMaxSize()).thenReturn(3);
88         when(mResource.getInteger((R.integer.recentsThumbnailCacheSize))).thenReturn(3);
89         TaskThumbnailCache thumbnailCache = new TaskThumbnailCache(mContext, mock(Executor.class),
90                 mTaskKeyCache);
91         // Preload is not needed when it has the same cache size
92         assertFalse(thumbnailCache.updateCacheSizeAndRemoveExcess());
93         verify(mTaskKeyCache, never()).updateCacheSizeAndRemoveExcess(anyInt());
94     }
95 }
96