Adding dumpsys based power monitor for android.

tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor_unittest.py

Index: tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor_unittest.py
diff --git a/tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor_unittest.py b/tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor_unittest.py
new file mode 100644
index 0000000000000000000000000000000000000000..dc524b2ade6978f85198470049dbfb59b6edb888
--- /dev/null
+++ b/tools/telemetry/telemetry/core/platform/power_monitor/android_dumpsys_power_monitor_unittest.py
@@ -0,0 +1,24 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import unittest
+
+from telemetry.core.platform.power_monitor import android_dumpsys_power_monitor
+from telemetry.core.util import GetUnittestDataDir
+
+
+class DS2784PowerMonitorMonitorTest(unittest.TestCase):
+  def testEnergyComsumption(self):
+    package = 'com.google.android.apps.chrome'
+    dumpsys_output = os.path.join(GetUnittestDataDir(), 'batterystats_v7.csv')
+    with open(dumpsys_output, 'r') as output:
+      results = (
+          android_dumpsys_power_monitor.DumpsysPowerMonitor.ParseSamplingOutput(
+              package, output))
+    self.assertEqual(results['identifier'], 'dumpsys')
+    self.assertAlmostEqual(results['energy_consumption_mwh'], 2.924)
+
+if __name__ == '__main__':
+  unittest.main()