adb_profile_chrome: Refactor into multiple modules and add tests

build/android/chrome_profiler/controllers_unittest.py

+# 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 json
+import unittest
+
+from chrome_profiler import controllers
+from chrome_profiler import profiler
+
+from pylib import android_commands
+from pylib.device import device_utils
+
+
+_BROWSER = 'stable'
+
+
+class ControllersTest(unittest.TestCase):
+  def setUp(self):
+    devices = android_commands.GetAttachedDevices()
+    self.assertEquals(len(devices), 1)

[Dominik Grewe, 2014/05/22 18:07:10]

Is this always true on the bots?

[Sami, 2014/05/27 11:03:54]

You're right, it isn't. I think I'll just pick the first device arbitrarily for
the tests.

+    self.package_info = profiler.GetSupportedBrowsers()[_BROWSER]
+    self.device = device_utils.DeviceUtils(devices[0])
+
+    adb = android_commands.AndroidCommands(devices[0])
+    adb.StartActivity(self.package_info.package,
+                      self.package_info.activity,
+                      wait_for_completion=True)
+
+  def testChromeTracingGetCategories(self):
+    # Not supported on stable yet.
+    if _BROWSER == 'stable':

[Dominik Grewe, 2014/05/22 18:07:10]

Currently this will always be false, won't it? Are you planning to change this
later?

[Sami, 2014/05/27 11:03:54]

That's right, this is really here only for manual testing for now. I'll add a
TODO for turning this test on once category queries hit stable.

+      return
+
+    categories = \
+        controllers.ChromeTracingController.GetCategories(self.device,
+                                                          self.package_info)
+    self.assertEquals(len(categories), 2)
+    self.assertTrue(categories[0])
+    self.assertTrue(categories[1])
+
+  def testChromeTracing(self):
+    categories = '*'
+    ring_buffer = False
+    controller = controllers.ChromeTracingController(self.device,
+                                                     self.package_info,
+                                                     categories,
+                                                     ring_buffer)
+
+    interval = 1
+    try:
+      controller.StartTracing(interval)
+    finally:
+      controller.StopTracing()
+
+    result = controller.PullTrace()
+    try:
+      with open(result) as f:
+        json.loads(f.read())
+    finally:
+      os.remove(result)
+
+  def testSystraceGetCategories(self):
+    categories = controllers.SystraceController.GetCategories(self.device)
+    self.assertTrue(categories)
+
+  def testSystrace(self):
+    categories = ['gfx', 'input', 'view']
+    ring_buffer = False
+    controller = controllers.SystraceController(self.device,
+                                                categories,
+                                                ring_buffer)
+
+    interval = 1
+    try:
+      controller.StartTracing(interval)
+    finally:
+      controller.StopTracing()
+
+    result = controller.PullTrace()
+    try:
+      with open(result) as f:
+        self.assertTrue('CPU#' in f.read())
+    finally:
+      os.remove(result)