Add a git-drover.

tests/git_common_test.py

 #!/usr/bin/env python
 # 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.
 
 """Unit tests for git_common.py"""
 
 import binascii
 import collections
 import os
+import shutil
 import signal
 import sys
 import tempfile
 import time
 import unittest
 
 DEPOT_TOOLS_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 sys.path.insert(0, DEPOT_TOOLS_ROOT)
 
 from testing_support import coverage_utils
@@ skipping 715 matching lines @@
 
       # Thaw it out!
       self.assertIsNone(self.gc.thaw())
       self.assertIsNotNone(self.gc.thaw())  # One thaw should thaw everything
 
       self.assertEquals(self.repo.git('status', '--porcelain').stdout, STATUS_1)
 
     self.repo.run(inner)
 
 
+class GitMakeWorkdir(git_test_utils.GitRepoReadOnlyTestBase, GitCommonTestBase):
+  def setUp(self):
+    self._tempdir = tempfile.mkdtemp()
+
+  def tearDown(self):
+    shutil.rmtree(self._tempdir)
+
+  REPO_SCHEMA = """
+  A
+  """
+
+  def testMakeWorkdir(self):
+    if not hasattr(os, 'symlink'):
+      return
+
+    workdir = os.path.join(self._tempdir, 'workdir')
+    self.gc.make_workdir(os.path.join(self.repo.repo_path, '.git'),
+                         os.path.join(workdir, '.git'))
+    EXPECTED_LINKS = [
+        'config', 'info', 'hooks', 'logs/refs', 'objects', 'refs',
+    ]
+    for path in EXPECTED_LINKS:
+      self.assertTrue(os.path.islink(os.path.join(workdir, '.git', path)))
+      self.assertEqual(os.path.realpath(os.path.join(workdir, '.git', path)),
+                       os.path.join(self.repo.repo_path, '.git', path))
+    self.assertFalse(os.path.islink(os.path.join(workdir, '.git', 'HEAD')))
+
+
+
 if __name__ == '__main__':
   sys.exit(coverage_utils.covered_main(
     os.path.join(DEPOT_TOOLS_ROOT, 'git_common.py')))