Add an "in_unit_test_mode" attribute to the environment. Use this to default output format to 'gtes…

content/test/gpu/gpu_tests/cloud_storage_test_base.py

 # Copyright 2013 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.
 
 """Base classes for a test and validator which upload results
 (reference images, error images) to cloud storage."""
 
 import os
 import re
 import tempfile
@@ skipping 29 matching lines @@
         expectation["color"][2])
     if not actual_color.IsEqual(expected_color, expectation["tolerance"]):
       raise page_test.Failure('Expected pixel at ' + str(location) +
           ' to be ' +
           str(expectation["color"]) + " but got [" +
           str(actual_color.r) + ", " +
           str(actual_color.g) + ", " +
           str(actual_color.b) + "]")
 
 class ValidatorBase(page_test.PageTest):
+  options = {'output_format': 'gtest'}

[Ken Russell (switch to Gerrit), 2014/07/24 01:24:33]

Where is it documented that a class variable named "options" is consulted later?

+
   def __init__(self):
     super(ValidatorBase, self).__init__()
     # Parameters for cloud storage reference images.
     self.vendor_id = None
     self.device_id = None
     self.vendor_string = None
     self.device_string = None
     self.msaa = False
 
   ###
@@ skipping 184 matching lines @@
         default='')
     group.add_option('--test-machine-name',
         help='Name of the test machine. Specifying this argument causes this '
         'script to upload failure images and diffs to cloud storage directly, '
         'instead of relying on the archive_gpu_pixel_test_results.py script.',
         default='')
     group.add_option('--generated-dir',
         help='Overrides the default on-disk location for generated test images '
         '(only used for local testing without a cloud storage account)',
         default=default_generated_data_dir)