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.os; 18 19 import android.content.Context; 20 import android.test.AndroidTestCase; 21 import android.test.suitebuilder.annotation.SmallTest; 22 23 public class PowerManagerTest extends AndroidTestCase { 24 25 private PowerManager mPm; 26 27 /** 28 * Setup any common data for the upcoming tests. 29 */ 30 @Override 31 public void setUp() throws Exception { 32 super.setUp(); 33 mPm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE); 34 } 35 36 /** 37 * Confirm that the setup is good. 38 * 39 * @throws Exception 40 */ 41 @SmallTest 42 public void testPreconditions() throws Exception { 43 assertNotNull(mPm); 44 } 45 46 /** 47 * Confirm that we can create functional wakelocks. 48 * 49 * @throws Exception 50 */ 51 @SmallTest 52 public void testNewWakeLock() throws Exception { 53 PowerManager.WakeLock wl = mPm.newWakeLock(PowerManager.FULL_WAKE_LOCK, "FULL_WAKE_LOCK"); 54 doTestWakeLock(wl); 55 56 wl = mPm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "SCREEN_BRIGHT_WAKE_LOCK"); 57 doTestWakeLock(wl); 58 59 wl = mPm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "SCREEN_DIM_WAKE_LOCK"); 60 doTestWakeLock(wl); 61 62 wl = mPm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "PARTIAL_WAKE_LOCK"); 63 doTestWakeLock(wl); 64 65 doTestSetBacklightBrightness(); 66 67 // TODO: Some sort of functional test (maybe not in the unit test here?) 68 // that confirms that things are really happening e.g. screen power, keyboard power. 69 } 70 71 /** 72 * Confirm that we can't create dysfunctional wakelocks. 73 * 74 * @throws Exception 75 */ 76 @SmallTest 77 public void testBadNewWakeLock() throws Exception { 78 79 final int badFlags = PowerManager.SCREEN_BRIGHT_WAKE_LOCK 80 | PowerManager.SCREEN_DIM_WAKE_LOCK; 81 // wrap in try because we want the error here 82 try { 83 PowerManager.WakeLock wl = mPm.newWakeLock(badFlags, "foo"); 84 } catch (IllegalArgumentException e) { 85 return; 86 } 87 fail("Bad WakeLock flag was not caught."); 88 } 89 90 /** 91 * Apply a few tests to a wakelock to make sure it's healthy. 92 * 93 * @param wl The wakelock to be tested. 94 */ 95 private void doTestWakeLock(PowerManager.WakeLock wl) { 96 // First try simple acquire/release 97 wl.acquire(); 98 assertTrue(wl.isHeld()); 99 wl.release(); 100 assertFalse(wl.isHeld()); 101 102 // Try ref-counted acquire/release 103 wl.setReferenceCounted(true); 104 wl.acquire(); 105 assertTrue(wl.isHeld()); 106 wl.acquire(); 107 assertTrue(wl.isHeld()); 108 wl.release(); 109 assertTrue(wl.isHeld()); 110 wl.release(); 111 assertFalse(wl.isHeld()); 112 113 // Try non-ref-counted 114 wl.setReferenceCounted(false); 115 wl.acquire(); 116 assertTrue(wl.isHeld()); 117 wl.acquire(); 118 assertTrue(wl.isHeld()); 119 wl.release(); 120 assertFalse(wl.isHeld()); 121 122 // TODO: Threaded test (needs handler) to make sure timed wakelocks work too 123 } 124 125 126 /** 127 * Test that calling {@link android.os.IHardwareService#setBacklights(int)} requires 128 * permissions. 129 * <p>Tests permission: 130 * {@link android.Manifest.permission#DEVICE_POWER} 131 */ 132 private void doTestSetBacklightBrightness() { 133 try { 134 mPm.setBacklightBrightness(0); 135 fail("setBacklights did not throw SecurityException as expected"); 136 } catch (SecurityException e) { 137 // expected 138 } 139 } 140 141 } 142