[IndexedDB] Adding traces, perf tests

tools/telemetry/telemetry/testing/test_page_test_results.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 telemetry.internal.results import page_test_results
 from telemetry.page import page as page_module
+from telemetry.value import list_of_scalar_values
 from telemetry.value import scalar
 
 
 class TestPageTestResults(
     page_test_results.PageTestResults):
   def __init__(self, test):
     super(TestPageTestResults, self).__init__()
     self.test = test
     page = page_module.Page("http://www.google.com", {})
     self.WillRunPage(page)
 
   def GetPageSpecificValueNamed(self, name):
     values = [value for value in self.all_page_specific_values
          if value.name == name]
     assert len(values) == 1, 'Could not find value named %s' % name
     return values[0]
 
   def AssertHasPageSpecificScalarValue(self, name, units, expected_value):
     value = self.GetPageSpecificValueNamed(name)
     self.test.assertEquals(units, value.units)
     self.test.assertTrue(isinstance(value, scalar.ScalarValue))
     self.test.assertEquals(expected_value, value.value)
 
+  def AssertHasPageSpecificListOfScalarValues(self, name, units,
+                                              expected_values):
+    value = self.GetPageSpecificValueNamed(name)
+    self.test.assertEquals(units, value.units)
+    self.test.assertTrue(
+        isinstance(value, list_of_scalar_values.ListOfScalarValues))
+    self.test.assertItemsEqual(expected_values, value.values)
+
   def __str__(self):
     return '\n'.join([repr(x) for x in self.all_page_specific_values])