Prompt to delete pending edits before changing the Gerrit CL description.

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 20 matching lines @@
 class ChangelistMock(object):
   # A class variable so we can access it when we don't have access to the
   # instance that's being set.
   desc = ""
   def __init__(self, **kwargs):
     pass
   def GetIssue(self):
     return 1
   def GetDescription(self):
     return ChangelistMock.desc
-  def UpdateDescription(self, desc):
+  def UpdateDescription(self, desc, force=False):
     ChangelistMock.desc = desc
 
 
 class PresubmitMock(object):
   def __init__(self, *args, **kwargs):
     self.reviewers = []
   @staticmethod
   def should_continue():
     return True
 
@@ skipping 1605 matching lines @@
           '# Enter a description of the change.\n'
           '# This will be displayed on the codereview site.\n'
           '# The first line will also be used as the subject of the review.\n'
           '#--------------------This line is 72 characters long'
           '--------------------\n'
           'Some.\n\nBUG=\n\nChange-Id: xxx',
           desc)
       # Simulate user changing something.
       return 'Some.\n\nBUG=123\n\nChange-Id: xxx'
 
-    def UpdateDescriptionRemote(_, desc):
+    def UpdateDescriptionRemote(_, desc, force=False):
       self.assertEquals(desc, 'Some.\n\nBUG=123\n\nChange-Id: xxx')
 
     self.mock(git_cl.sys, 'stdout', StringIO.StringIO())
     self.mock(git_cl.Changelist, 'GetDescription',
               lambda *args: current_desc)
     self.mock(git_cl._GerritChangelistImpl, 'UpdateDescriptionRemote',
               UpdateDescriptionRemote)
     self.mock(git_cl.gclient_utils, 'RunEditor', RunEditor)
 
     self.calls = [
@@ skipping 279 matching lines @@
       'current_revision': 'deadbeaf',
     }
     cl._codereview_impl.SubmitIssue = lambda wait_for_merge: None
     self.assertEqual(0, cl.CMDLand(force=True, bypass_hooks=True, verbose=True))
 
 
 if __name__ == '__main__':
   git_cl.logging.basicConfig(
       level=git_cl.logging.DEBUG if '-v' in sys.argv else git_cl.logging.ERROR)
   unittest.main()