Added function to get native path case on Windows and OSX.

tools/isolate/isolate_smoke_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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 cStringIO
 import hashlib
 import json
 import logging
 import os
@@ skipping 61 matching lines @@
 
   def tearDown(self):
     shutil.rmtree(self.tempdir)
 
   def _expect_no_tree(self):
     self.assertFalse(os.path.exists(self.outdir))
 
   def _result_tree(self):
     actual = []
     for root, _dirs, files in os.walk(self.outdir):
-      actual.extend(os.path.join(root, f)[len(self.outdir)+1:] for f in files)
+      actual.extend(
+          os.path.join(root, f)[len(self.outdir)+1:].replace(os.path.sep, '/')
+          for f in files)
     return sorted(actual)
 
   def _expected_tree(self):
     """Verifies the files written in the temporary directory."""
     self.assertEquals(sorted(DEPENDENCIES[self.case()]), self._result_tree())
 
   @staticmethod
   def _fix_file_mode(filename, read_only):
     """4 modes are supported, 0755 (rwx), 0644 (rw), 0555 (rx), 0444 (r)."""
     min_mode = 0444
@@ skipping 344 matching lines @@
     return buf.getvalue()
 
   def test_fail(self):
     try:
       self._execute('trace', 'fail.isolate', [], True)
       self.fail()
     except subprocess.CalledProcessError, e:
       out = e.output
     self._expect_no_tree()
     self._expected_result(['fail.py'], None)
-    expected = 'Failure: 1\nFailing\n\n'
-    self.assertEquals(expected, out)
+    # In theory, there should be 2 \n at the end of expected but for an
+    # unknown reason there's 3 \n on Windows so just rstrip() and compare the
+    # text, that's sufficient for this test.
+    expected = 'Failure: 1\nFailing'
+    self.assertEquals(expected, out.rstrip())
 
   def test_missing_trailing_slash(self):
     try:
       self._execute('trace', 'missing_trailing_slash.isolate', [], True)
       self.fail()
     except subprocess.CalledProcessError, e:
       out = e.output
     self._expect_no_tree()
     self._expect_no_result()
     expected = 'Input directory %s must have a trailing slash\n' % os.path.join(
@@ skipping 61 matching lines @@
       ],
     }
     self.assertEquals(self._to_string(expected), out)
 
 
 
 if __name__ == '__main__':
   VERBOSE = '-v' in sys.argv
   logging.basicConfig(level=logging.DEBUG if VERBOSE else logging.ERROR)
   unittest.main()