old_contents: # Copyright (c) 2014 The Johns Hopkins University/Applied Physics Laboratory
  # All Rights Reserved
  #
  #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    Unless required by applicable law or agreed to in writing, software
  #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  #    License for the specific language governing permissions and limitations
  #    under the License.
  
  import os
  
  from nova import test
  from nova import utils
  from nova.virt.libvirt.storage import dmcrypt
  
  
  class LibvirtDmcryptTestCase(test.NoDBTestCase):
      def setUp(self):
          super(LibvirtDmcryptTestCase, self).setUp()
  
          self.CIPHER = 'cipher'
          self.KEY_SIZE = 256
          self.NAME = 'disk'
          self.TARGET = dmcrypt.volume_name(self.NAME)
          self.PATH = '/dev/nova-lvm/instance_disk'
          self.KEY = range(0, self.KEY_SIZE)
          self.KEY_STR = ''.join(["%02x" % x for x in range(0, self.KEY_SIZE)])
  
          self.executes = []
          self.kwargs = {}
  
          def fake_execute(*cmd, **kwargs):
              self.executes.append(cmd)
              self.kwargs = kwargs
              return None, None
  
          def fake_listdir(path):
              return [self.TARGET, '/dev/mapper/disk']
  
          self.stubs.Set(utils, 'execute', fake_execute)
          self.stubs.Set(os, 'listdir', fake_listdir)
  
      def test_create_volume(self):
          expected_commands = [('cryptsetup',
                 'create',
                 self.TARGET,
                 self.PATH,
                 '--cipher=' + self.CIPHER,
                 '--key-size=' + str(self.KEY_SIZE),
                 '--key-file=-')]
          dmcrypt.create_volume(self.TARGET, self.PATH, self.CIPHER,
              self.KEY_SIZE, self.KEY)
  
          self.assertEqual(expected_commands, self.executes)
          self.assertEqual(self.KEY_STR, self.kwargs['process_input'])
  
      def test_delete_volume(self):
          expected_commands = [('cryptsetup', 'remove', self.TARGET)]
          dmcrypt.delete_volume(self.TARGET)
  
          self.assertEqual(expected_commands, self.executes)
  
      def test_list_volumes(self):
          encrypted_volumes = dmcrypt.list_volumes()
  
          self.assertEqual([self.TARGET], encrypted_volumes)
  
new_contents: # Copyright (c) 2014 The Johns Hopkins University/Applied Physics Laboratory
  # All Rights Reserved
  #
  #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    Unless required by applicable law or agreed to in writing, software
  #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  #    License for the specific language governing permissions and limitations
  #    under the License.
  
  import mock
  
  from nova import test
  from nova.virt.libvirt.storage import dmcrypt
  
  
  class LibvirtDmcryptTestCase(test.NoDBTestCase):
      def setUp(self):
          super(LibvirtDmcryptTestCase, self).setUp()
  
          self.CIPHER = 'cipher'
          self.KEY_SIZE = 256
          self.NAME = 'disk'
          self.TARGET = dmcrypt.volume_name(self.NAME)
          self.PATH = '/dev/nova-lvm/instance_disk'
          self.KEY = range(0, self.KEY_SIZE)
          self.KEY_STR = ''.join(["%02x" % x for x in range(0, self.KEY_SIZE)])
  
      @mock.patch('nova.utils.execute')
      def test_create_volume(self, mock_execute):
          dmcrypt.create_volume(self.TARGET, self.PATH, self.CIPHER,
              self.KEY_SIZE, self.KEY)
  
          mock_execute.assert_has_calls([
              mock.call('cryptsetup', 'create', self.TARGET, self.PATH,
                        '--cipher=' + self.CIPHER,
                        '--key-size=' + str(self.KEY_SIZE),
                        '--key-file=-', process_input=self.KEY_STR,
                        run_as_root=True),
          ])
  
      @mock.patch('nova.utils.execute')
      def test_delete_volume(self, mock_execute):
          dmcrypt.delete_volume(self.TARGET)
  
          mock_execute.assert_has_calls([
              mock.call('cryptsetup', 'remove', self.TARGET, run_as_root=True),
          ])
  
      @mock.patch('os.listdir')
      def test_list_volumes(self, mock_listdir):
          mock_listdir.return_value = [self.TARGET, '/dev/mapper/disk']
          encrypted_volumes = dmcrypt.list_volumes()
  
          self.assertEqual(1, mock_listdir.call_count)
          self.assertEqual([self.TARGET], encrypted_volumes)
  
subject: Replace stubs with mocks for test_dmcrypt