Add an assert to ensure UTF-8 locale when handling file paths.

appengine/swarming/swarming_bot/bot_code/bot_main_test.py

 #!/usr/bin/env python
 # Copyright 2013 The Swarming Authors. All rights reserved.
 # Use of this source code is governed by the Apache v2.0 license that can be
 # found in the LICENSE file.
 
 import json
 import logging
 import os
 import shutil
 import sys
 import tempfile
 import threading
 import time
 import unittest
 
 import test_env_bot_code
 test_env_bot_code.setup_test_env()
 
 # Creates a server mock for functions in net.py.
 import net_utils
 
 import bot_main
 import xsrf_client
 from api import bot
 from api import os_utilities
+from depot_tools import fix_encoding
+from utils import file_path
 from utils import logging_utils
 from utils import net
 from utils import subprocess42
 from utils import zip_package
 
 
 # Access to a protected member XX of a client class - pylint: disable=W0212
 
 
 class TestBotMain(net_utils.TestCase):
@@ skipping 31 matching lines @@
     with open(config_path, 'rb') as f:
       config = json.load(f)
     self.mock(bot_main, 'get_config', lambda: config)
     self.mock(
         bot_main, 'THIS_FILE',
         os.path.join(test_env_bot_code.BOT_DIR, 'swarming_bot.zip'))
 
   def tearDown(self):
     os.environ.pop('SWARMING_BOT_ID', None)
     os.chdir(self.old_cwd)
-    shutil.rmtree(self.root_dir)
+    file_path.rmtree(self.root_dir)
     super(TestBotMain, self).tearDown()
 
   def test_get_dimensions(self):
     dimensions = set(bot_main.get_dimensions())
     dimensions.discard('hidpi')
     dimensions.discard('zone')  # Only set on GCE bots.
     expected = {'cores', 'cpu', 'gpu', 'id', 'machine_type', 'os'}
     self.assertEqual(expected, dimensions)
 
   def test_get_dimensions_load_test(self):
@@ skipping 434 matching lines @@
 
     def run_bot(error):
       self.assertEqual(None, error)
       return 0
     self.mock(bot_main, 'run_bot', run_bot)
 
     self.assertEqual(0, bot_main.main([]))
 
 
 if __name__ == '__main__':
+  fix_encoding.fix_encoding()
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.CRITICAL)
   unittest.main()