Fix case where there is nothing to uprev.

bin/cbuildbot_unittest.py

 #!/usr/bin/python
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Unittests for cbuildbot.  Needs to be run inside of chroot for mox."""
 
 import __builtin__
 import mox
@@ skipping 11 matching lines @@
                         ['login_manager', 'platform/login_manager']
                        ]
     self._test_cros_workon_packages = \
       'chromeos-base/kernel\nchromeos-base/chromeos-login\n'
     self._test_board = 'test-board'
     self._buildroot = '.'
     self._test_dict = {'kernel' : ['chromos-base/kernel', 'dev-util/perf'],
                        'cros' : ['chromos-base/libcros']
                       }
     self._test_string = "kernel.git@12345test cros.git@12333test"
+    self._test_string += " crosutils.git@blahblah"
     self._revision_file = 'test-revisions.pfq'
     self._test_parsed_string_array = [
                                       ['chromeos-base/kernel', '12345test'],
                                       ['dev-util/perf', '12345test'],
                                       ['chromos-base/libcros', '12345test']
                                      ]
 
   def testParseRevisionString(self):
     """Test whether _ParseRevisionString parses string correctly."""
     return_array = cbuildbot._ParseRevisionString(self._test_string,
@@ skipping 51 matching lines @@
     cbuildbot._UprevFromRevisionList(self._buildroot,
                                      self._test_parsed_string_array)
     self.mox.ReplayAll()
     cbuildbot._UprevPackages(self._buildroot, self._revision_file,
                              self._test_board)
     self.mox.VerifyAll()
 
 
 if __name__ == '__main__':
   unittest.main()