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  #   Copyright 2012 OpenStack LLC.
  #
  #   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 datetime
  import json
  import uuid
  from xml.dom import minidom
  
  import webob
  
  from cinder.api import common
  from cinder.api.openstack.wsgi import MetadataXMLDeserializer
  from cinder.api.openstack.wsgi import XMLDeserializer
  from cinder import test
  from cinder.tests.api import fakes
  from cinder import volume
  
  
  def fake_volume_get(*args, **kwargs):
      return {
          'id': 'fake',
          'host': 'host001',
          'status': 'available',
          'size': 5,
          'availability_zone': 'somewhere',
          'created_at': datetime.datetime.now(),
          'attach_status': None,
          'display_name': 'anothervolume',
          'display_description': 'Just another volume!',
          'volume_type_id': None,
          'snapshot_id': None,
          'project_id': 'fake',
      }
  
  
  def fake_volume_get_all(*args, **kwargs):
      return [fake_volume_get()]
  
  
  fake_image_metadata = {
      'image_id': 'someid',
      'image_name': 'fake',
      'kernel_id': 'somekernel',
      'ramdisk_id': 'someramdisk',
  }
  
  
  def fake_get_volume_image_metadata(*args, **kwargs):
      return fake_image_metadata
  
  
  class VolumeImageMetadataTest(test.TestCase):
      content_type = 'application/json'
  
      def setUp(self):
          super(VolumeImageMetadataTest, self).setUp()
          self.stubs.Set(volume.API, 'get', fake_volume_get)
          self.stubs.Set(volume.API, 'get_all', fake_volume_get_all)
          self.stubs.Set(volume.API, 'get_volume_image_metadata',
                         fake_get_volume_image_metadata)
          self.UUID = uuid.uuid4()
  
      def _make_request(self, url):
          req = webob.Request.blank(url)
          req.accept = self.content_type
          res = req.get_response(fakes.wsgi_app())
          return res
  
      def _get_image_metadata(self, body):
          return json.loads(body)['volume']['volume_image_metadata']
  
      def _get_image_metadata_list(self, body):
          return [
              volume['volume_image_metadata']
              for volume in json.loads(body)['volumes']
          ]
  
      def test_get_volume(self):
          res = self._make_request('/v2/fake/volumes/%s' % self.UUID)
          self.assertEqual(res.status_int, 200)
          self.assertEqual(self._get_image_metadata(res.body),
                           fake_image_metadata)
  
      def test_list_detail_volumes(self):
          res = self._make_request('/v2/fake/volumes/detail')
          self.assertEqual(res.status_int, 200)
          self.assertEqual(self._get_image_metadata_list(res.body)[0],
                           fake_image_metadata)
  
  
  class ImageMetadataXMLDeserializer(common.MetadataXMLDeserializer):
      metadata_node_name = "volume_image_metadata"
  
  
  class VolumeImageMetadataXMLTest(VolumeImageMetadataTest):
      content_type = 'application/xml'
  
      def _get_image_metadata(self, body):
          deserializer = XMLDeserializer()
          volume = deserializer.find_first_child_named(
              minidom.parseString(body), 'volume')
          image_metadata = deserializer.find_first_child_named(
              volume, 'volume_image_metadata')
          return MetadataXMLDeserializer().extract_metadata(image_metadata)
  
      def _get_image_metadata_list(self, body):
          deserializer = XMLDeserializer()
          volumes = deserializer.find_first_child_named(
              minidom.parseString(body), 'volumes')
          volume_list = deserializer.find_children_named(volumes, 'volume')
          image_metadata_list = [
              deserializer.find_first_child_named(
                  volume, 'volume_image_metadata'
              )
              for volume in volume_list]
          return map(MetadataXMLDeserializer().extract_metadata,
                     image_metadata_list)
  