1 /*
2  * Copyright (C) 2024 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 com.android.server.deviceconfig;
18 
19 import static com.android.server.deviceconfig.ServiceResourcesHelper.RESOURCES_PACKAGE_SUFFIX;
20 import static com.google.common.truth.Truth.assertThat;
21 
22 import static org.mockito.ArgumentMatchers.anyInt;
23 import static org.mockito.Mockito.times;
24 import static org.mockito.Mockito.verify;
25 import static org.mockito.Mockito.when;
26 
27 import android.content.Context;
28 import android.content.pm.PackageInfo;
29 import android.content.pm.PackageManager;
30 
31 import androidx.test.filters.SmallTest;
32 
33 import org.junit.Before;
34 import org.junit.Rule;
35 import org.junit.Test;
36 import org.mockito.Mock;
37 import org.mockito.junit.MockitoJUnit;
38 import org.mockito.junit.MockitoRule;
39 
40 import java.util.ArrayList;
41 import java.util.List;
42 import java.util.Optional;
43 
44 @SmallTest
45 public class ServiceResourcesHelperTest {
46     @Rule public MockitoRule mockitoRule = MockitoJUnit.rule();
47 
48     @Mock private Context mContext;
49     @Mock private PackageManager mPackageManager;
50 
51     @Before
setUp()52     public void setUp() throws Exception {
53         ServiceResourcesHelper.setInstanceForTest(null);
54         when(mContext.getPackageManager()).thenReturn(mPackageManager);
55     }
56 
57     @Test
getResourcesPackageName_singleValidPackage_returnsThePackage()58     public void getResourcesPackageName_singleValidPackage_returnsThePackage() {
59         mockInstalledPackages(
60                 PackageManager.MATCH_SYSTEM_ONLY,
61                 "random.package.name", "abc" + RESOURCES_PACKAGE_SUFFIX, "a.b.c");
62 
63         assertThat(ServiceResourcesHelper.get(mContext).getResourcesPackageName())
64                 .isEqualTo(Optional.of("abc" + RESOURCES_PACKAGE_SUFFIX));
65     }
66 
67     @Test
getResourcesPackageName_multipleValidPackages_returnsFirstOne()68     public void getResourcesPackageName_multipleValidPackages_returnsFirstOne() {
69         mockInstalledPackages(
70                 PackageManager.MATCH_SYSTEM_ONLY,
71                 "abc" + RESOURCES_PACKAGE_SUFFIX, "a" + RESOURCES_PACKAGE_SUFFIX);
72 
73         assertThat(ServiceResourcesHelper.get(mContext).getResourcesPackageName())
74                 .isEqualTo(Optional.of("abc" + RESOURCES_PACKAGE_SUFFIX));
75     }
76 
77     @Test
getResourcesPackageName_usesOnlySystemPackages()78     public void getResourcesPackageName_usesOnlySystemPackages() {
79         mockInstalledPackages(
80                 PackageManager.MATCH_SYSTEM_ONLY,
81                 "random.package.name", "a.b.c");
82         // Although one of these packages has a valid resource package name format, it's not a
83         // system package, so it should not be returned from `getResourcesPackageName`.
84         mockInstalledPackages(
85                 PackageManager.MATCH_ALL,
86                 "random.package.name", "a.b.c", "abc" + RESOURCES_PACKAGE_SUFFIX);
87 
88         assertThat(ServiceResourcesHelper.get(mContext).getResourcesPackageName())
89                 .isEqualTo(Optional.empty());
90     }
91 
92     @Test
resourcePackageFetchedOnlyOnce()93     public void resourcePackageFetchedOnlyOnce() {
94         ServiceResourcesHelper.get(mContext).getResourcesPackageName();
95         ServiceResourcesHelper.get(mContext).getResourcesPackageName();
96 
97         verify(mPackageManager, times(1)).getInstalledPackages(anyInt());
98     }
99 
createPackageInfo(String packageName)100     private PackageInfo createPackageInfo(String packageName) {
101         PackageInfo info = new PackageInfo();
102         info.packageName = packageName;
103         return info;
104     }
105 
mockInstalledPackages(int packageManagerFlag, String... packageNames)106     private void mockInstalledPackages(int packageManagerFlag, String... packageNames) {
107         List<PackageInfo> info = new ArrayList<>();
108         for (String packageName : packageNames) {
109             info.add(createPackageInfo(packageName));
110         }
111         when(mPackageManager.getInstalledPackages(packageManagerFlag)).thenReturn(info);
112     }
113 }
114