Add support for landing to pending ref.

tests/git_cl_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.
 
 """Unit tests for git_cl.py."""
 
 import os
 import StringIO
 import stat
@@ skipping 188 matching lines @@
       private_call = []
     else:
       cc_call = [((['git', 'config', 'rietveld.cc'],), '')]
       private_call = [
           ((['git', 'config', 'rietveld.private'],), '')]
 
     return [
         ((['git', 'config', 'core.editor'],), ''),
     ] + cc_call + private_call + [
         ((['git', 'config', 'branch.master.base-url'],), ''),
+        ((['git', 'config', 'rietveld.pending-ref-prefix'],), ''),
         ((['git',
            'config', '--local', '--get-regexp', '^svn-remote\\.'],),
          (('', None), 0)),
         ((['git', 'rev-parse', '--show-cdup'],), ''),
         ((['git', 'svn', 'info'],), ''),
         ((['git', 'config', 'rietveld.project'],), ''),
         ((['git',
            'config', 'branch.master.rietveldissue', '1'],), ''),
         ((['git', 'config', 'branch.master.rietveldserver',
            'https://codereview.example.com'],), ''),
@@ skipping 26 matching lines @@
        'refs/heads/master'),
       ((['git',
          'config', 'branch.%s.remote' % working_branch],), 'origin'),
       ((['git', 'rev-list', '^' + fake_ancestor,
          'refs/remotes/origin/master'],), ''),
        ]
 
   @classmethod
   def _dcommit_calls_1(cls):
     return [
+      ((['git', 'config', 'rietveld.autoupdate'],),
+       ''),
+      ((['git', 'config', 'rietveld.pending-ref-prefix'],),
+       ''),
       ((['git',
          'config', '--local', '--get-regexp', '^svn-remote\\.'],),
        ((('svn-remote.svn.url svn://svn.chromium.org/chrome\n'
           'svn-remote.svn.fetch trunk/src:refs/remotes/origin/master'),
          None),
         0)),
-      ((['git', 'config', 'rietveld.autoupdate'],),
-       ''),
       ((['git',
          'config', 'rietveld.server'],), 'codereview.example.com'),
       ((['git', 'symbolic-ref', 'HEAD'],), 'refs/heads/working'),
       ((['git', 'config', '--int', '--get',
         'branch.working.git-cl-similarity'],), ''),
       ((['git', 'symbolic-ref', 'HEAD'],), 'refs/heads/working'),
       ((['git', 'config', '--int', '--get',
         'branch.working.git-find-copies'],), ''),
       ((['git', 'symbolic-ref', 'HEAD'],), 'refs/heads/working'),
       ((['git',
@@ skipping 409 matching lines @@
         ((['git', 'config', '--unset-all',
            'rietveld.viewvc-url'],), ''),
         ((['git', 'config', '--unset-all',
            'rietveld.bug-prefix'],), ''),
         ((['git', 'config', '--unset-all',
            'rietveld.cpplint-regex'],), ''),
         ((['git', 'config', '--unset-all',
            'rietveld.cpplint-ignore-regex'],), ''),
         ((['git', 'config', '--unset-all',
            'rietveld.project'],), ''),
+        ((['git', 'config', '--unset-all',
+           'rietveld.pending-ref-prefix'],), ''),
         ((['git', 'config', 'gerrit.host',
            'gerrit.chromium.org'],), ''),
         # DownloadHooks(False)
         ((['git', 'config', 'gerrit.host'],),
          'gerrit.chromium.org'),
         ((['git', 'rev-parse', '--show-cdup'],), ''),
         ((commit_msg_path, os.X_OK,), False),
         (('https://gerrit-review.googlesource.com/tools/hooks/commit-msg',
           commit_msg_path,), ''),
         ((commit_msg_path,), True),
@@ skipping 65 matching lines @@
 
     self.calls = [
         ((['git', 'config', 'rietveld.autoupdate',],),
          ''),
         ((['git', 'config', 'gerrit.host',],),
          ''),
         ((['git', 'rev-parse', '--show-cdup',],),
          ''),
         ((['git', 'config', 'rietveld.private',],),
          ''),
+        ((['git', 'config', 'rietveld.pending-ref-prefix',],),
+         ''),
         ((['git', 'config', '--local', '--get-regexp', '^svn-remote\\.'],),
          ''),
         ((['git', 'config', 'rietveld.project',],),
          ''),
         ((['git', 'rev-parse', 'HEAD',],),
          ''),
         ]
 
     stored_description = []
     def check_upload(args):
@@ skipping 74 matching lines @@
   def AffectedFiles(self):
     return []
 
   def LocalPaths(self):
     return None
 
 if __name__ == '__main__':
   git_cl.logging.basicConfig(
       level=git_cl.logging.DEBUG if '-v' in sys.argv else git_cl.logging.ERROR)
   unittest.main()