1 /* 2 * Copyright (C) 2008 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.app.activity; 18 19 import android.app.AlarmManager; 20 import android.content.Context; 21 import android.test.AndroidTestCase; 22 23 import androidx.test.filters.LargeTest; 24 25 import java.util.TimeZone; 26 27 public class SetTimeZonePermissionsTest extends AndroidTestCase { 28 29 private String[] mZones; 30 private String mCurrentZone; 31 private AlarmManager mAlarm; 32 33 @Override setUp()34 protected void setUp() throws Exception { 35 super.setUp(); 36 37 mZones = TimeZone.getAvailableIDs(); 38 mCurrentZone = TimeZone.getDefault().getID(); 39 mAlarm = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE); 40 } 41 42 /** 43 * Verify that non-system processes cannot set the time zone. 44 */ 45 @LargeTest testSetTimeZonePermissions()46 public void testSetTimeZonePermissions() { 47 /** 48 * Attempt to set several predefined time zones, verifying that the system 49 * system default time zone has not actually changed from its prior state 50 * after each attempt. 51 */ 52 int max = (mZones.length > 10) ? mZones.length : 10; 53 assertTrue("No system-defined time zones - test invalid", max > 0); 54 55 for (int i = 0; i < max; i++) { 56 String tz = mZones[i]; 57 try { 58 mAlarm.setTimeZone(tz); 59 } catch (SecurityException se) { 60 // Expected failure; no need to handle specially since we're 61 // about to assert that the test invariant holds: no change 62 // to the system time zone. 63 } 64 65 String newZone = TimeZone.getDefault().getID(); 66 assertEquals("AlarmManager.setTimeZone() succeeded despite lack of permission", 67 mCurrentZone, 68 newZone); 69 } 70 } 71 } 72