luci-py: Making __file__ usage unicode safe.

client/tests/trace_inputs_test.py

 #!/usr/bin/env python
 # coding=utf-8
 # Copyright 2012 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 StringIO
 import logging
 import os
 import sys
 import unittest
 
-BASE_DIR = unicode(os.path.dirname(os.path.abspath(__file__)))
+BASE_DIR = os.path.dirname(os.path.abspath(
+    __file__.decode(sys.getfilesystemencoding())))
 ROOT_DIR = os.path.dirname(BASE_DIR)
 sys.path.insert(0, ROOT_DIR)
 
-FILE_PATH = unicode(os.path.abspath(__file__))
+FILE_PATH = os.path.abspath(__file__.decode(sys.getfilesystemencoding()))
 
 import trace_inputs
 
 # Access to a protected member _FOO of a client class
 # pylint: disable=W0212
 
 
 def join_norm(*args):
   """Joins and normalizes path in a single step."""
   return unicode(os.path.normpath(os.path.join(*args)))
@@ skipping 202 matching lines @@
       lines = [
         (self._ROOT_PID,
           'clone(child_stack=0, flags=CLONE_CHILD_CLEARTID'
             '|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f5350f829d0) = %d' %
             self._CHILD_PID),
         (self._CHILD_PID,
           'clone(child_stack=0, flags=CLONE_CHILD_CLEARTID'
             '|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f5350f829d0) = %d' %
             self._GRAND_CHILD_PID),
         (self._GRAND_CHILD_PID,
-          'open("%s", O_RDONLY)       = 76' % os.path.basename(str(FILE_PATH))),
+          'open("%s", O_RDONLY)       = 76' % os.path.basename(
+              FILE_PATH.encode('utf-8'))),
       ]
       size = os.stat(FILE_PATH).st_size
       expected = {
         'root': {
           'children': [
             {
               'children': [
                 {
                   'children': [],
                   'command': None,
@@ skipping 428 matching lines @@
        }
       self.assertContext(lines, ROOT_DIR, expected, False)
 
 
 if __name__ == '__main__':
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   unittest.main()