Telemetry: Create new profile creator large_profile_creator.

tools/perf/profile_creators/history_profile_extender_unittest.py

+# 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 os
+import shutil
+import tempfile
+import unittest
+
+from profile_creators.history_profile_extender import HistoryProfileExtender
+from telemetry.core import util
+from telemetry.unittest_util import options_for_unittests
+
+util.AddDirToPythonPath(util.GetTelemetryDir(), 'third_party', 'mock')
+import mock
+
+
+# Testing private method.
+# pylint: disable=protected-access
+class HistoryProfileExtenderTest(unittest.TestCase):
+  def testFullFunctionality(self):
+    extender = HistoryProfileExtender()
+
+    # Stop the extender at the earliest possible opportunity.
+    extender.ShouldExit = mock.MagicMock(return_value=True)
+    # Normally, the number of tabs depends on the number of cores. Use a
+    # static, small number to increase the speed of the test.
+    extender.NumTabs = mock.MagicMock(return_value=3)
+
+    options = options_for_unittests.GetCopy()
+    options.output_profile_path = tempfile.mkdtemp()
+
+    try:
+      extender.Run(options)
+      self.assertEquals(extender.profile_path, options.output_profile_path)
+      self.assertTrue(os.path.exists(extender.profile_path))
+      history_db_path = os.path.join(extender.profile_path, "Default",
+          "History")
+      stat_info = os.stat(history_db_path)
+      self.assertGreater(stat_info.st_size, 1000)
+    finally:
+      shutil.rmtree(options.output_profile_path)