[Telemetry] Makes serially_executed_browser_test_case.LoadAllTestsInModule return nothing if not ex…

telemetry/telemetry/testing/browser_test_runner.py

 # 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.
 
 import argparse
 import json
 import logging
 import re
 import time
 import unittest
@@ skipping 13 matching lines @@
   options = browser_options.BrowserFinderOptions()
   options.browser_type = 'any'
   parser = options.CreateParser(test_class.__doc__)
   test_class.AddCommandlineArgs(parser)
   # Set the default chrome root variable. This is required for the
   # Android browser finder to function properly.
   parser.set_defaults(chrome_root=project_config.default_chrome_root)
   finder_options, positional_args = parser.parse_args(args)
   finder_options.positional_args = positional_args
   options_for_unittests.Push(finder_options)
+  # Use this to signal serially_executed_browser_test_case.LoadAllTestsInModule
+  # not to load tests in cases it's not invoked by browser_test_runner
+  # framework.
+  finder_options.browser_test_runner_running = True
   return finder_options
 
 
 def _ValidateDistinctNames(browser_test_classes):
   names_to_test_classes = {}
   for cl in browser_test_classes:
     name = cl.Name()
     if name in names_to_test_classes:
       raise Exception('Test name %s is duplicated between %s and %s' % (
           name, repr(cl), repr(names_to_test_classes[name])))
@@ skipping 256 matching lines @@
           # as failure name in this case since shortName() is not available.
           failures.append(fail.id())
       failures = sorted(list(failures))
       for failure_id in failures:
         json_results['failures'].append(failure_id)
       for passed_test_case in results.successes:
         json_results['successes'].append(passed_test_case.shortName())
       json_results['times'].update(results.times)
       json.dump(json_results, f)
   return len(results.failures + results.errors)