[telemetry] OutputFormatter for unit tests.

tools/telemetry/telemetry/unittest/output_formatter.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.
+
+
+class OutputFormatter(object):

[nednguyen, 2014/07/09 17:26:46]

Do we have any other classes besides gtest_output_formatter that will subclass
this?

The API of this OutputFormatter seems to support python unittest, not telemetry
benchmark.

[dtu, 2014/07/10 00:35:01]

Benchmarks only use one hook - PrintSummary(result), which is called
StopTestRun() here.
This API is not that different from the current PageTestResults API, which is
currently used by the GPU tests/benchmarks.
We will also subclass this to provide JSON output for unit tests, as requested
by the infra team (not related to benchmark JSON)
I wouldn't be opposed if we ended up using separate OutputFormatter base classes
for benchmarks and unit tests.

+  def __init__(self, output_stream):
+    self._output_stream = output_stream
+
+  def StartTest(self, test):
+    pass
+
+  def StartTestSuite(self, suite):
+    pass
+
+  def StartTestRun(self):
+    pass
+
+  def StopTest(self, test):
+    pass
+
+  def StopTestSuite(self, suite):
+    pass
+
+  def StopTestRun(self, result):
+    pass
+
+  def Error(self, test, err):
+    pass
+
+  def Failure(self, test, err):
+    pass
+
+  def Success(self, test):
+    pass
+
+  def Skip(self, test, reason):
+    pass