1 /*
2  * Copyright (C) 2018 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.wm;
18 
19 import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
20 
21 import static org.junit.Assert.assertEquals;
22 import static org.junit.Assert.assertNotNull;
23 import static org.junit.Assert.assertTrue;
24 
25 import android.content.Context;
26 import android.content.pm.UserInfo;
27 import android.os.UserHandle;
28 import android.os.UserManager;
29 import android.platform.test.annotations.Presubmit;
30 import android.util.SparseBooleanArray;
31 
32 import androidx.test.filters.FlakyTest;
33 
34 import org.junit.After;
35 import org.junit.Before;
36 import org.junit.Test;
37 
38 /**
39  * Tests for {@link TaskPersister}.
40  *
41  * Build/Install/Run:
42  *  atest WmTests:TaskPersisterTest
43  */
44 @Presubmit
45 public class TaskPersisterTest {
46     private static final String TEST_USER_NAME = "AM-Test-User";
47 
48     private TaskPersister mTaskPersister;
49     private int mTestUserId;
50     private UserManager mUserManager;
51 
52     @Before
setUp()53     public void setUp() throws Exception {
54         final Context context = getInstrumentation().getTargetContext();
55         mUserManager = UserManager.get(context);
56         mTaskPersister = new TaskPersister(context.getFilesDir());
57         // In ARC, the maximum number of supported users is one, which is different from the ones of
58         // most phones (more than 4). This prevents TaskPersisterTest from creating another user for
59         // test. However, since guest users can be added as much as possible, we create guest user
60         // in the test.
61         mTestUserId = createUser(TEST_USER_NAME, UserInfo.FLAG_GUEST);
62     }
63 
64     @After
tearDown()65     public void tearDown() throws Exception {
66         mTaskPersister.unloadUserDataFromMemory(mTestUserId);
67         removeUser(mTestUserId);
68     }
69 
getRandomTaskIdForUser(int userId)70     private int getRandomTaskIdForUser(int userId) {
71         int taskId = (int) (Math.random() * UserHandle.PER_USER_RANGE);
72         taskId += UserHandle.PER_USER_RANGE * userId;
73         return taskId;
74     }
75 
76     @Test
testTaskIdsPersistence()77     public void testTaskIdsPersistence() {
78         SparseBooleanArray taskIdsOnFile = new SparseBooleanArray();
79         for (int i = 0; i < 100; i++) {
80             taskIdsOnFile.put(getRandomTaskIdForUser(mTestUserId), true);
81         }
82         mTaskPersister.writePersistedTaskIdsForUser(taskIdsOnFile, mTestUserId);
83         SparseBooleanArray newTaskIdsOnFile = mTaskPersister
84                 .loadPersistedTaskIdsForUser(mTestUserId);
85         assertEquals("TaskIds written differ from TaskIds read back from file",
86                 taskIdsOnFile, newTaskIdsOnFile);
87     }
88 
createUser(String name, int flags)89     private int createUser(String name, int flags) {
90         UserInfo user = mUserManager.createUser(name, flags);
91         assertNotNull("Error while creating the test user: " + TEST_USER_NAME, user);
92         return user.id;
93     }
94 
removeUser(int userId)95     private void removeUser(int userId) {
96         boolean userRemoved = mUserManager.removeUser(userId);
97         assertTrue("Error while removing the test user: " + TEST_USER_NAME, userRemoved);
98     }
99 }
100