src/tools/telemetry/telemetry/core/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
  11
  12 class PlatformBackendTest(unittest.TestCase):
  13   def testPowerMonitoringSync(self):
  14     # Tests that the act of monitoring power doesn't blow up.
  15     platform = platform_module.GetHostPlatform()
  16     can_monitor_power = platform.CanMonitorPower()
  17     self.assertIsInstance(can_monitor_power, bool)
  18     if not can_monitor_power:
  19       logging.warning('Test not supported on this platform.')
  20       return
  21
  22     browser_mock = lambda: None
  23     # Android needs to access the package of the monitored app.
  24     if platform.GetOSName() == 'android':
  25       # pylint: disable=W0212
  26       browser_mock._browser_backend = lambda: None
  27       # Monitor the launcher, which is always present.
  28       browser_mock._browser_backend.package = 'com.android.launcher'
  29
  30     platform.StartMonitoringPower(browser_mock)
  31     time.sleep(0.001)
  32     output = platform.StopMonitoringPower()
  33     self.assertTrue(output.has_key('energy_consumption_mwh'))
  34     self.assertTrue(output.has_key('identifier'))