[IndexedDB] Adding traces, perf tests

tools/telemetry/telemetry/testing/test_page_test_results.py

Index: tools/telemetry/telemetry/testing/test_page_test_results.py
diff --git a/tools/telemetry/telemetry/testing/test_page_test_results.py b/tools/telemetry/telemetry/testing/test_page_test_results.py
index 82e72a71e063131fd697344c2f5fcfabd23cfb95..3770c72dd60237e6daa873ed4ddb61cc18584102 100644
--- a/tools/telemetry/telemetry/testing/test_page_test_results.py
+++ b/tools/telemetry/telemetry/testing/test_page_test_results.py
@@ -4,6 +4,7 @@
 
 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
 
 
@@ -27,5 +28,13 @@ class TestPageTestResults(
     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])