text: # -*- coding: utf-8 -*-
  
  # 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.
  
  """
  test_dmcrypt
  ----------------------------------
  
  Tests for `dmcrypt` module.
  """
  
  import base64
  from unittest import mock
  
  from vaultlocker import dmcrypt
  from vaultlocker.tests.unit import base
  
  
  class TestDMCrypt(base.TestCase):
  
      @mock.patch.object(dmcrypt, 'subprocess')
      def test_luks_format(self, _subprocess):
          dmcrypt.luks_format('mykey', '/dev/sdb', 'test-uuid')
          _subprocess.check_output.assert_called_once_with(
              ['cryptsetup',
               '--batch-mode',
               '--uuid', 'test-uuid',
               '--key-file', '-',
               'luksFormat', '/dev/sdb'],
              input='mykey'.encode('UTF-8')
          )
  
      @mock.patch.object(dmcrypt, 'subprocess')
      def test_luks_open(self, _subprocess):
          dmcrypt.luks_open('mykey', 'test-uuid')
          _subprocess.check_output.assert_called_once_with(
              ['cryptsetup',
               '--batch-mode',
               '--key-file', '-',
               'open', 'UUID=test-uuid', 'crypt-test-uuid',
               '--type', 'luks'],
              input='mykey'.encode('UTF-8')
          )
  
      @mock.patch.object(dmcrypt, 'os')
      def test_generate_key(self, _os):
          _key = b'randomdatastringfromentropy'
          _os.urandom.return_value = _key
          self.assertEqual(dmcrypt.generate_key(),
                           base64.b64encode(_key).decode('UTF-8'))
          _os.urandom.assert_called_with(dmcrypt.KEY_SIZE / 8)
  
      @mock.patch.object(dmcrypt, 'subprocess')
      def test_udevadm_rescan(self, _subprocess):
          dmcrypt.udevadm_rescan('/dev/vdb')
          _subprocess.check_output.assert_called_once_with(
              ['udevadm',
               'trigger',
               '--name-match=/dev/vdb',
               '--action=add']
          )
  
      @mock.patch.object(dmcrypt, 'subprocess')
      def test_udevadm_settle(self, _subprocess):
          dmcrypt.udevadm_settle('myuuid')
          _subprocess.check_output.assert_called_once_with(
              ['udevadm',
               'settle',
               '--exit-if-exists=/dev/disk/by-uuid/myuuid']
          )
  