text: #    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.tests.unit.virt.libvirt.volume import test_volume
  from nova.virt.libvirt.volume import nvme
  
  from os_brick.initiator import connector
  
  
  class LibvirtNVMEVolumeDriverTestCase(test_volume.LibvirtVolumeBaseTestCase):
  
      @mock.patch('os.path.exists', return_value=True)
      def test_libvirt_nvme_driver(self, exists):
          libvirt_driver = nvme.LibvirtNVMEVolumeDriver(self.fake_host)
          self.assertIsInstance(libvirt_driver.connector,
                                connector.NVMeConnector)
  
      def test_libvirt_nvme_driver_connect(self):
          nvme_driver = nvme.LibvirtNVMEVolumeDriver(self.fake_host)
          config = {'server_ip': '127.0.0.1', 'server_port': 9898}
          disk_info = {
              'id': '1234567',
              'name': 'aNVMEVolume',
              'conf': config}
          connection_info = {'data': disk_info}
          with mock.patch.object(nvme_driver.connector,
                                 'connect_volume',
                                 return_value={'path': '/dev/dms1234567'}):
              nvme_driver.connect_volume(connection_info, None)
              self.assertEqual('/dev/dms1234567',
                               connection_info['data']['device_path'])
  
      def test_libvirt_nvme_driver_disconnect(self):
          nvme_con = nvme.LibvirtNVMEVolumeDriver(self.connr)
          nvme_con.connector.disconnect_volume = mock.MagicMock()
          disk_info = {
              'path': '/dev/dms1234567', 'name': 'aNVMEVolume',
                       'type': 'raw', 'dev': 'vda1', 'bus': 'pci0',
                       'device_path': '/dev/dms123456'}
          connection_info = {'data': disk_info}
          nvme_con.disconnect_volume(connection_info, None)
          nvme_con.connector.disconnect_volume.assert_called_once_with(
              disk_info, None)
  
      def test_libvirt_nvme_driver_get_config(self):
          nvme_driver = nvme.LibvirtNVMEVolumeDriver(self.fake_host)
          device_path = '/dev/fake-dev'
          connection_info = {'data': {'device_path': device_path}}
  
          conf = nvme_driver.get_config(connection_info, self.disk_info)
          tree = conf.format_dom()
  
          self.assertEqual('block', tree.get('type'))
          self.assertEqual(device_path, tree.find('./source').get('dev'))
          self.assertEqual('raw', tree.find('./driver').get('type'))
  