Create daemon to monitor android device temperatures

scripts/slave/recipe_modules/chromium_android/tests/spawn_device_temp_monitor_test.py

Index: scripts/slave/recipe_modules/chromium_android/tests/spawn_device_temp_monitor_test.py
diff --git a/scripts/slave/recipe_modules/chromium_android/tests/spawn_device_temp_monitor_test.py b/scripts/slave/recipe_modules/chromium_android/tests/spawn_device_temp_monitor_test.py
new file mode 100755
index 0000000000000000000000000000000000000000..b6278436f761ee8ba7049bffeb1b969a1c4b79b4
--- /dev/null
+++ b/scripts/slave/recipe_modules/chromium_android/tests/spawn_device_temp_monitor_test.py
@@ -0,0 +1,127 @@
+#!/usr/bin/env python
+# Copyright 2015 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 json
+import os
+import shutil
+import signal
+import subprocess
+import sys
+import tempfile
+import unittest
+
+THIS_DIR = os.path.dirname(os.path.abspath(__file__))
+
+# For 'test_env'.
+sys.path.insert(
+    0, os.path.abspath(os.path.join(THIS_DIR, '..', '..', '..', 'unittests')))
+# For 'spawn_device_temp_monitor.py'.
+sys.path.insert(
+    0, os.path.abspath(os.path.join(THIS_DIR, '..', 'resources')))
+
+# Imported for side effects on sys.path.
+import test_env
+import mock
+
+# In depot_tools/
+from testing_support import auto_stub
+import spawn_device_temp_monitor
+
+
+class SimulatedSigterm(Exception):
+  pass
+
+
+class MainFuncTest(auto_stub.TestCase):
+  def setUp(self):
+    # Collect calls to 'subprocess.Popen', which calls send_ts_mon_values.py.
+    self.send_ts_mon_call = []
+    def mocked_ts_mon_calls(args):
+      self.send_ts_mon_call = args
+    self.mock(
+        spawn_device_temp_monitor.subprocess,
+        'Popen',
+        mocked_ts_mon_calls)
+
+    # Make sleep throw an exception to simulate a sigterm
+    # and break out of loop.
+    def mocked_sleep_call(duration):
+      self.assertEquals(60, duration)
+      raise SimulatedSigterm('simulated sigterm')
+    self.mock(
+        spawn_device_temp_monitor.time,
+        'sleep',
+        mocked_sleep_call)
+
+  def test_main_responsive_device(self):
+    # Collect calls to 'subprocess.check_output', which calls adb, and
+    # simulate a responsive device.
+    adb_calls = []
+    def mocked_adb_calls(args):
+      adb_calls.append(args)
+      if args[4].startswith('grep'):
+        return "some_thermal_file_name"
+      elif args[4].startswith('cat'):
+        return "123"
+      elif args[4].startswith('dumpsys'):
+        return "temperature: 456"
+      else:
+        self.fail('Unexpected adb command: %s' % (' '.join(args)))
+
+    self.mock(
+        spawn_device_temp_monitor.subprocess,
+        'check_output',
+        mocked_adb_calls)
+    try:
+      spawn_device_temp_monitor.main(
+          '/some/adb/path',
+          '["device_serial_1"]',
+          'some_slave_name')
+    except SimulatedSigterm:
+      pass
+
+    # Should build args to send_ts_mon_values correctly.
+    expected_cmd = [spawn_device_temp_monitor._RUN_PY,
+        'infra.tools.send_ts_mon_values',
+        '--float',
+        '{"slave": "some_slave_name", "name": "dev/cpu/temperature", '
+        '"value": 123, "device_id": "device_serial_1"}',
+        '--float',
+        '{"slave": "some_slave_name", "name": "dev/battery/temperature", '
+        '"value": 456, "device_id": "device_serial_1"}']
+    self.assertEquals(expected_cmd, self.send_ts_mon_call)
+  
+  def test_main_unresponsive_device(self):
+    # Collect calls to 'subprocess.check_output', which calls adb, and
+    # simulate an unresponsive device.
+    adb_calls = []
+    def mocked_adb_calls(args):
+      adb_calls.append(args)
+      raise subprocess.CalledProcessError
+
+    self.mock(
+        spawn_device_temp_monitor.subprocess,
+        'check_output',
+        mocked_adb_calls)
+    try:
+      spawn_device_temp_monitor.main(
+          '/some/adb/path',
+          '["device_serial_1"]',
+          'some_slave_name')
+    except SimulatedSigterm:
+      pass
+
+    # Should build args to send_ts_mon_values without any metrics.
+    self.assertEquals(2, len(self.send_ts_mon_call))
+    self.assertEquals(
+        spawn_device_temp_monitor._RUN_PY,
+        self.send_ts_mon_call[0])
+    self.assertEquals(
+        'infra.tools.send_ts_mon_values',
+        self.send_ts_mon_call[1])
+
+
+if __name__ == '__main__':
+  unittest.main()