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| 1 #!/usr/bin/env python | |
| 2 # Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 3 # Use of this source code is governed by a BSD-style license that can be | |
| 4 # found in the LICENSE file. | |
| 5 | |
| 6 import os | |
| 7 | |
| 8 import pyauto_functional # Must be imported before pyauto | |
| 9 import pyauto | |
| 10 | |
| 11 from chromeos.power_strip import PowerStrip | |
| 12 | |
| 13 class ChromeosBattery(pyauto.PyUITest): | |
| 14 """Tests ChromeOS Battery Status. | |
| 15 | |
| 16 Preconditions: | |
| 17 1) Device under test (DUT) is connected to the LAN via an | |
| 18 Ethernet-to-USB adapter plugged into one of its USB ports. | |
| 19 2) AC power cable is connected to the DUT, and plugged into | |
| 20 the IP controlled Power Switch, outlet #4, located in the lab. | |
| 21 3) Battery is installed in the DUT, and battery is not fully | |
| 22 discharged. | |
| 23 4) Tester should have physical access to the power switch. | |
| 24 | |
| 25 Note about time calculation: | |
| 26 When AC power is turned off or on, the battery will take from 2 | |
| 27 to 60 seconds to calculate the time remaining to empty or full. | |
| 28 While calculating, the keys 'battery_time_to_full' and | |
| 29 'battery_time_to_empty' are absent. | |
| 30 """ | |
| 31 | |
| 32 _BATTERY_CONFIG_FILE = os.path.join(pyauto.PyUITest.DataDir(), | |
| 33 'pyauto_private', 'chromeos', 'power', | |
| 34 'battery_testbed_config') | |
| 35 | |
| 36 def setUp(self): | |
| 37 pyauto.PyUITest.setUp(self) | |
| 38 self.InitPowerStrip() | |
| 39 | |
| 40 def tearDown(self): | |
| 41 # Leave AC power ON so battery does not discharge between tests | |
| 42 self._power_strip.PowerOn(self._outlet_battery_full) | |
| 43 pyauto.PyUITest.tearDown(self) | |
| 44 | |
| 45 def InitPowerStrip(self): | |
| 46 assert os.path.exists(ChromeosBattery._BATTERY_CONFIG_FILE), \ | |
| 47 'Power Strip configuration file does not exist.' | |
| 48 power_config = pyauto.PyUITest.EvalDataFrom( | |
| 49 ChromeosBattery._BATTERY_CONFIG_FILE) | |
| 50 self._power_strip = PowerStrip(power_config['strip_ip']) | |
| 51 self._outlet_battery_full = (power_config['configs'] | |
| 52 ['battery_full'] | |
| 53 ['outlet_id']) | |
| 54 | |
| 55 def WaitUntilBatteryState(self, ac_power_on, time_key): | |
| 56 assert self.WaitUntil(lambda: self.BatteryPowerAndChargeStateAgree( | |
| 57 ac_power_on, time_key), timeout=60, retry_sleep=1), \ | |
| 58 'Battery charge/discharge time was not calculated.' | |
| 59 return | |
| 60 | |
| 61 def BatteryPowerAndChargeStateAgree(self, ac_power_on, time_key): | |
| 62 battery_status = self.GetBatteryInfo() | |
| 63 return (battery_status.get('line_power_on') == ac_power_on and | |
| 64 time_key in battery_status) | |
| 65 | |
| 66 def testBatteryChargesWhenACisOn(self): | |
| 67 """Calculate battery time to full when AC is ON""" | |
| 68 # Apply AC power to chromebook with battery. | |
| 69 self._power_strip.PowerOn(self._outlet_battery_full) | |
| 70 | |
| 71 # Get info about charging battery | |
| 72 self.WaitUntilBatteryState(True,'battery_time_to_full') | |
| 73 battery_status = self.GetBatteryInfo() | |
| 74 self.assertTrue(battery_status.get('battery_is_present'), | |
| 75 msg='Battery is not present.') | |
| 76 self.assertTrue(battery_status.get('line_power_on'), | |
| 77 msg='Line power is off.') | |
| 78 self.assertTrue(battery_status.get('battery_time_to_full') >= 0, | |
| 79 msg='Battery charge time is negative.') | |
| 80 | |
| 81 def testBatteryDischargesWhenACisOff(self): | |
| 82 """Calculate battery time to empty when AC is OFF""" | |
| 83 self._power_strip.PowerOff(self._outlet_battery_full) | |
| 84 | |
| 85 # Get info about discharging battery | |
| 86 self.WaitUntilBatteryState(False,'battery_time_to_empty') | |
| 87 battery_status = self.GetBatteryInfo() | |
| 88 self.assertTrue(battery_status.get('battery_is_present'), | |
| 89 msg='Battery is not present.') | |
| 90 self.assertFalse(battery_status.get('line_power_on'), | |
| 91 msg='Line power is on.') | |
| 92 self.assertTrue(battery_status.get('battery_time_to_empty') >= 0, | |
| 93 msg='Battery discharge time is negative.') | |
| 94 | |
| 95 def testBatteryTimesAreDifferent(self): | |
| 96 """Time to full and time to empty should be different""" | |
| 97 # Turn AC Power ON | |
| 98 self._power_strip.PowerOn(self._outlet_battery_full) | |
| 99 | |
| 100 # Get charging battery time to full | |
| 101 self.WaitUntilBatteryState(True,'battery_time_to_full') | |
| 102 battery_status = self.GetBatteryInfo() | |
| 103 time_to_full = battery_status.get('battery_time_to_full') | |
| 104 | |
| 105 # Turn AC Power OFF | |
| 106 self._power_strip.PowerOff(self._outlet_battery_full) | |
| 107 | |
| 108 # Get discharging battery time to empty | |
| 109 self.WaitUntilBatteryState(False,'battery_time_to_empty') | |
| 110 battery_status = self.GetBatteryInfo() | |
| 111 time_to_empty = battery_status.get('battery_time_to_empty') | |
| 112 | |
| 113 # Compare charge to discharge time | |
| 114 """Confirm that time to full and time to empty are not | |
| 115 returning the same value, but that the values are | |
| 116 different (e.g., both are not zero).""" | |
| 117 self.assertNotEqual(time_to_full, time_to_empty, | |
| 118 msg='Battery time to full equals time to empty. ' | |
| 119 'Though very unlikely, this is not impossible. ' | |
| 120 'If test failed falsely, Kris owes Scott a beer.') | |
| 121 | |
| 122 | |
| 123 if __name__ == '__main__': | |
| 124 pyauto_functional.Main() | |
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