sdk/platform-tools/systrace/catapult/telemetry/telemetry/internal/platform/platform_backend_unittest.py

   1 # Copyright 2014 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 import logging
   6 import time
   7 import unittest
   8
   9 from telemetry.core import platform as platform_module
  10 from telemetry import decorators
  11
  12
  13 class PlatformBackendTest(unittest.TestCase):
  14   @decorators.Disabled('mac',       # crbug.com/440666
  15                        'vista',     # crbug.com/479337
  16                        'chromeos',  # crbug.com/483212
  17                        'win')       # catapult/issues/2282
  18   def testPowerMonitoringSync(self):
  19     # Tests that the act of monitoring power doesn't blow up.
  20     platform = platform_module.GetHostPlatform()
  21     can_monitor_power = platform.CanMonitorPower()
  22     self.assertIsInstance(can_monitor_power, bool)
  23     if not can_monitor_power:
  24       logging.warning('Test not supported on this platform.')
  25       return
  26
  27     browser_mock = lambda: None
  28     # Android needs to access the package of the monitored app.
  29     if platform.GetOSName() == 'android':
  30       # pylint: disable=protected-access
  31       browser_mock._browser_backend = lambda: None
  32       # Monitor the launcher, which is always present.
  33       browser_mock._browser_backend.package = 'com.android.launcher'
  34
  35     platform.StartMonitoringPower(browser_mock)
  36     time.sleep(0.001)
  37     output = platform.StopMonitoringPower()
  38     self.assertTrue(output.has_key('energy_consumption_mwh'))
  39     self.assertTrue(output.has_key('identifier'))