Implement Timeline Based Measurement v2

telemetry/telemetry/value/translate_common_values.py

Index: telemetry/telemetry/value/translate_common_values.py
diff --git a/telemetry/telemetry/value/translate_common_values.py b/telemetry/telemetry/value/translate_common_values.py
new file mode 100644
index 0000000000000000000000000000000000000000..ce46452b8920fa4559b17645fa48b0814844589d
--- /dev/null
+++ b/telemetry/telemetry/value/translate_common_values.py
@@ -0,0 +1,35 @@
+# Copyright 2016 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.value import failure
+from telemetry.value import improvement_direction
+from telemetry.value import scalar
+
+
+def TranslateMreFailure(mre_failure, page):
+  return failure.FailureValue.FromMessage(mre_failure.stack, page)
+
+
+def TranslateScalarValue(scalar_value, page):
+  assert (scalar_value['type'] == 'numeric' and
+          scalar_value['numeric']['type'] == 'scalar')
+  scalar_value['value'] = scalar_value['numeric']['value']
+
+  name = scalar_value['grouping_keys']['name']
+
+  unit_parts = scalar_value['numeric']['unit'].split('_')
+  if len(unit_parts) != 2:
+    raise ValueError('Must specify improvement direction for value ' + name)
+
+  scalar_value['units'] = unit_parts[0]
+
+  if unit_parts[1] == 'biggerIsBetter':
+    scalar_value['improvement_direction'] = improvement_direction.UP
+  else:
+    assert unit_parts[1] == 'smallerIsBetter'
+    scalar_value['improvement_direction'] = improvement_direction.DOWN
+
+  scalar_value['page'] = page
+  scalar_value['name'] = name
+  del scalar_value['grouping_keys']['name']
+  return scalar.ScalarValue.FromDict(scalar_value, {})