text: # Copyright (c) 2013 - 2015 EMC Corporation.
  # 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 json
  
  from six.moves import urllib
  
  from cinder import context
  from cinder import exception
  from cinder.tests.unit import fake_snapshot
  from cinder.tests.unit import fake_volume
  from cinder.tests.unit.volume.drivers.dell_emc import scaleio
  from cinder.tests.unit.volume.drivers.dell_emc.scaleio import mocks
  
  
  class TestCreateVolumeFromSnapShot(scaleio.TestScaleIODriver):
      """Test cases for ``ScaleIODriver.create_volume_from_snapshot()``"""
      def setUp(self):
          """Setup a test case environment.
  
          Creates fake volume and snapshot objects and sets up the required
          API responses.
          """
          super(TestCreateVolumeFromSnapShot, self).setUp()
          ctx = context.RequestContext('fake', 'fake', auth_token=True)
  
          self.snapshot = fake_snapshot.fake_snapshot_obj(ctx)
          self.snapshot_name_2x_enc = urllib.parse.quote(
              urllib.parse.quote(self.driver._id_to_base64(self.snapshot.id))
          )
          self.volume = fake_volume.fake_volume_obj(ctx)
          self.volume_name_2x_enc = urllib.parse.quote(
              urllib.parse.quote(self.driver._id_to_base64(self.volume.id))
          )
  
          self.snapshot_reply = json.dumps(
              {
                  'volumeIdList': [self.volume.id],
                  'snapshotGroupId': 'snap_group'
              }
          )
  
          self.HTTPS_MOCK_RESPONSES = {
              self.RESPONSE_MODE.Valid: {
                  'types/Volume/instances/getByName::' +
                  self.snapshot_name_2x_enc: self.snapshot.id,
                  'instances/System/action/snapshotVolumes':
                      self.snapshot_reply,
              },
              self.RESPONSE_MODE.BadStatus: {
                  'instances/System/action/snapshotVolumes':
                      self.BAD_STATUS_RESPONSE,
                  'types/Volume/instances/getByName::' +
                  self.snapshot_name_2x_enc: self.BAD_STATUS_RESPONSE,
              },
              self.RESPONSE_MODE.Invalid: {
                  'instances/System/action/snapshotVolumes':
                      mocks.MockHTTPSResponse(
                          {
                              'errorCode': self.OLD_VOLUME_NOT_FOUND_ERROR,
                              'message': 'BadStatus Volume Test',
                          }, 400
                      ),
                  'types/Volume/instances/getByName::' +
                  self.snapshot_name_2x_enc: None,
              },
          }
  
      def test_bad_login(self):
          self.set_https_response_mode(self.RESPONSE_MODE.BadStatus)
          self.assertRaises(
              exception.VolumeBackendAPIException,
              self.driver.create_volume_from_snapshot,
              self.volume,
              self.snapshot
          )
  
      def test_invalid_snapshot(self):
          self.set_https_response_mode(self.RESPONSE_MODE.Invalid)
          self.assertRaises(
              exception.VolumeBackendAPIException,
              self.driver.create_volume_from_snapshot,
              self.volume,
              self.snapshot
          )
  
      def test_create_volume_from_snapshot(self):
          self.set_https_response_mode(self.RESPONSE_MODE.Valid)
          self.driver.create_volume_from_snapshot(self.volume, self.snapshot)
  