Task Execution Duration metrics added as a new benchmark

tools/perf/measurements/task_execution_time_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.
+
+from measurements import task_execution_time
+from telemetry.core import wpr_modes
+from telemetry.page import page as page_module
+from telemetry.unittest import options_for_unittests
+from telemetry.unittest import page_test_test_case
+
+
+class TestTaskExecutionTimePage(page_module.Page):
+  def __init__(self, page_set, base_dir):
+    super(TestTaskExecutionTimePage, self).__init__(
+        'file://blank.html', page_set, base_dir)
+
+  def RunTaskExecutionTime(self, action_runner):
+    interaction = action_runner.BeginGestureInteraction(
+        'ScrollAction', is_smooth=True)
+    action_runner.ScrollPage()
+    interaction.End()
+
+
+class TaskExecutionTimeUnitTest(page_test_test_case.PageTestTestCase):
+  def setUp(self):
+    self._options = options_for_unittests.GetCopy()
+    self._options.browser_options.wpr_mode = wpr_modes.WPR_OFF
+
+  def testCorrectNumberOfResultsReturned(self):
+    ps = self.CreateEmptyPageSet()
+    ps.AddPage(TestTaskExecutionTimePage(ps, ps.base_dir))
+    measurement = task_execution_time.TaskExecutionTime()
+
+    results = self.RunMeasurement(measurement, ps, options=self._options)
+
+    self.assertEquals(
+        task_execution_time.TaskExecutionTime.GetExpectedResultCount(),
+        len(results.all_page_specific_values))
+
+  def testResultsAreDecreasing(self):
+    ps = self.CreateEmptyPageSet()
+    ps.AddPage(TestTaskExecutionTimePage(ps, ps.base_dir))
+    measurement = task_execution_time.TaskExecutionTime()
+
+    results = self.RunMeasurement(measurement, ps, options=self._options)
+
+    for first, second in zip(
+        results.all_page_specific_values, results.all_page_specific_values[1:]):
+      self.assertGreaterEqual(first.value, second.value)