[Telemetry] Introduce SummarizableValue.

tools/telemetry/telemetry/internal/results/story_run_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 unittest
 
 from telemetry.internal.results import story_run
 from telemetry.story import shared_state
 from telemetry.story import story_set
 from telemetry import story as story_module
 from telemetry.value import failure
+from telemetry.value import improvement_direction
 from telemetry.value import scalar
 from telemetry.value import skip
 
 
 # pylint: disable=abstract-method
 class SharedStateBar(shared_state.SharedState):
   pass
 
 class StoryFoo(story_module.Story):
   def __init__(self, name='', labels=None):
@@ skipping 10 matching lines @@
     return self.story_set.stories
 
   def testStoryRunFailed(self):
     run = story_run.StoryRun(self.stories[0])
     run.AddValue(failure.FailureValue.FromMessage(self.stories[0], 'test'))
     self.assertFalse(run.ok)
     self.assertTrue(run.failed)
     self.assertFalse(run.skipped)
 
     run = story_run.StoryRun(self.stories[0])
-    run.AddValue(scalar.ScalarValue(self.stories[0], 'a', 's', 1))
+    run.AddValue(scalar.ScalarValue(
+        self.stories[0], 'a', 's', 1,
+        improvement_direction=improvement_direction.UP))
     run.AddValue(failure.FailureValue.FromMessage(self.stories[0], 'test'))
     self.assertFalse(run.ok)
     self.assertTrue(run.failed)
     self.assertFalse(run.skipped)
 
   def testStoryRunSkipped(self):
     run = story_run.StoryRun(self.stories[0])
     run.AddValue(failure.FailureValue.FromMessage(self.stories[0], 'test'))
     run.AddValue(skip.SkipValue(self.stories[0], 'test'))
     self.assertFalse(run.ok)
     self.assertFalse(run.failed)
     self.assertTrue(run.skipped)
 
     run = story_run.StoryRun(self.stories[0])
-    run.AddValue(scalar.ScalarValue(self.stories[0], 'a', 's', 1))
+    run.AddValue(scalar.ScalarValue(
+        self.stories[0], 'a', 's', 1,
+        improvement_direction=improvement_direction.UP))
     run.AddValue(skip.SkipValue(self.stories[0], 'test'))
     self.assertFalse(run.ok)
     self.assertFalse(run.failed)
     self.assertTrue(run.skipped)
 
   def testStoryRunSucceeded(self):
     run = story_run.StoryRun(self.stories[0])
     self.assertTrue(run.ok)
     self.assertFalse(run.failed)
     self.assertFalse(run.skipped)
 
     run = story_run.StoryRun(self.stories[0])
-    run.AddValue(scalar.ScalarValue(self.stories[0], 'a', 's', 1))
+    run.AddValue(scalar.ScalarValue(
+        self.stories[0], 'a', 's', 1,
+        improvement_direction=improvement_direction.UP))
     self.assertTrue(run.ok)
     self.assertFalse(run.failed)
     self.assertFalse(run.skipped)