Fix broken git tests on mac.

testing_support/git_test_utils.py

 # Copyright 2013 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 atexit
 import collections
 import copy
 import datetime
 import hashlib
 import os
@@ skipping 265 matching lines @@
     """Makes new GitRepo.
 
     Automatically creates a temp folder under GitRepo.BASE_TEMP_DIR. It's
     recommended that you clean this repo up by calling nuke() on it, but if not,
     GitRepo will automatically clean up all allocated repos at the exit of the
     program (assuming a normal exit like with sys.exit)
 
     Args:
       schema - An instance of GitRepoSchema
     """
-    self.repo_path = tempfile.mkdtemp(dir=self.BASE_TEMP_DIR)
+    self.repo_path = os.path.realpath(tempfile.mkdtemp(dir=self.BASE_TEMP_DIR))
     self.commit_map = {}
     self._date = datetime.datetime(1970, 1, 1, tzinfo=UTC)
 
     self.to_schema_refs = ['--branches']
 
     self.git('init')
     self.git('config', 'user.name', 'testcase')
     self.git('config', 'user.email', 'testcase@example.com')
     for commit in schema.walk():
       self._add_schema_commit(commit, schema.data_for(commit.name))
@@ skipping 223 matching lines @@
     super(GitRepoReadWriteTestBase, self).setUp()
     self.repo = self.r_schema.reify()
 
   def tearDown(self):
     self.repo.nuke()
     super(GitRepoReadWriteTestBase, self).tearDown()
 
   def assertSchema(self, schema_string):
     self.assertEqual(GitRepoSchema(schema_string).simple_graph(),
                      self.repo.to_schema().simple_graph())