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

client/tests/logging_utils_test.py

 #!/usr/bin/env python
 # Copyright 2015 The Swarming Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0 that
 # can be found in the LICENSE file.
 
 import logging
 import os
 import subprocess
 import sys
 import tempfile
-import shutil
 import unittest
 import re
 
 THIS_FILE = os.path.abspath(__file__)
 sys.path.insert(0, os.path.dirname(os.path.dirname(THIS_FILE)))
 
+from third_party.depot_tools import fix_encoding
+from utils import file_path
 from utils import logging_utils
 
 
 # PID YYYY-MM-DD HH:MM:SS.MMM
 _LOG_HEADER = r'^%d \d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\.\d\d\d' % os.getpid()
 _LOG_HEADER_PID = r'^\d+ \d\d\d\d-\d\d-\d\d \d\d:\d\d:\d\d\.\d\d\d'
 
 
 _PHASE = 'LOGGING_UTILS_TESTS_PHASE'
 
 
 def call(phase, cwd):
   """Calls itself back."""
   env = os.environ.copy()
   env[_PHASE] = phase
   return subprocess.call([sys.executable, '-u', THIS_FILE], env=env, cwd=cwd)
 
 
 class Test(unittest.TestCase):
   def setUp(self):
     super(Test, self).setUp()
     self.tmp = tempfile.mkdtemp(prefix='logging_utils')
 
   def tearDown(self):
     try:
-      shutil.rmtree(self.tmp)
+      file_path.rmtree(self.tmp)
     finally:
       super(Test, self).tearDown()
 
   def test_capture(self):
     root = logging.RootLogger(logging.DEBUG)
     with logging_utils.CaptureLogs('foo', root) as log:
       root.debug('foo')
       result = log.read()
     expected = _LOG_HEADER + ': DEBUG foo\n$'
     if sys.platform == 'win32':
@@ skipping 53 matching lines @@
 def main():
   phase = os.environ.get(_PHASE)
   if phase:
     return getattr(sys.modules[__name__], phase)()
   verbose = '-v' in sys.argv
   logging.basicConfig(level=logging.DEBUG if verbose else logging.ERROR)
   unittest.main()
 
 
 if __name__ == '__main__':
+  fix_encoding.fix_encoding()
   sys.exit(main())