When the tree is closed, it's closed.

tests/presubmit_unittest.py

 #!/usr/bin/python
 # Copyright (c) 2010 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 presubmit_support.py and presubmit_canned_checks.py."""
 
 import StringIO
 
 # Fixes include path.
@@ skipping 1412 matching lines @@
     input_api = self.MockInputApi(None, True)
     connection = self.mox.CreateMockAnything()
     input_api.urllib2.urlopen('url_to_closed').AndReturn(connection)
     connection.read().AndReturn('0')
     connection.close()
     self.mox.ReplayAll()
     results = presubmit_canned_checks.CheckTreeIsOpen(
         input_api, presubmit.OutputApi, url='url_to_closed', closed='0')
     self.assertEquals(len(results), 1)
     self.assertEquals(results[0].__class__,
-                      presubmit.OutputApi.PresubmitPromptWarning)
+                      presubmit.OutputApi.PresubmitError)
 
   def testRunPythonUnitTestsNoTest(self):
     input_api = self.MockInputApi(None, False)
     self.mox.ReplayAll()
     results = presubmit_canned_checks.RunPythonUnitTests(
         input_api, presubmit.OutputApi, [])
     self.assertEquals(results, [])
 
   def testRunPythonUnitTestsNonExistentUpload(self):
     input_api = self.MockInputApi(None, False)
@@ skipping 159 matching lines @@
     results = presubmit_canned_checks.CheckBuildbotPendingBuilds(
         input_api, presubmit.OutputApi, 'uurl', 2, ('foo'))
     self.assertEquals(len(results), 1)
     self.assertEquals(results[0].__class__,
         presubmit.OutputApi.PresubmitNotifyResult)
 
 
 if __name__ == '__main__':
   import unittest
   unittest.main()