luci-py: Making __file__ usage unicode safe.

client/tests/on_error_test.py

 #!/usr/bin/env python
 # Copyright 2014 The LUCI 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 BaseHTTPServer
 import atexit
 import cgi
 import getpass
 import json
 import logging
 import os
 import platform
 import re
 import socket
 import ssl
 import subprocess
 import sys
 import threading
 import unittest
 import urllib
 import urlparse
 
-TESTS_DIR = os.path.dirname(os.path.abspath(__file__))
+TESTS_DIR = os.path.dirname(os.path.abspath(
+    __file__.decode(sys.getfilesystemencoding())))
 ROOT_DIR = os.path.dirname(TESTS_DIR)
 sys.path.insert(0, ROOT_DIR)
 sys.path.insert(0, os.path.join(ROOT_DIR, 'third_party'))
 
 from depot_tools import auto_stub
+from depot_tools import fix_encoding
+
 from utils import on_error
 
 
 PEM = os.path.join(TESTS_DIR, 'self_signed.pem')
 
 
 # Access to a protected member XXX of a client class - pylint: disable=W0212
 
 
 def _serialize_env():
@@ skipping 360 matching lines @@
   if mode == 'exception_no_msg':
     # Report from inside an exception frame.
     try:
       raise TypeError('You are not my type #2')
     except TypeError:
       on_error.report(None)
   return 0
 
 
 if __name__ == '__main__':
+  fix_encoding.fix_encoding()
+
   # Ignore _DISABLE_ENVVAR if set.
   os.environ.pop(on_error._DISABLE_ENVVAR, None)
 
   if len(sys.argv) == 4 and sys.argv[1] == 'run_shell_out':
     sys.exit(run_shell_out(sys.argv[2], sys.argv[3]))
 
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   unittest.main()