old_contents: #    Copyright 2013 IBM Corp.
  #
  #    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 uuid
  
  from nova.objects import instance as instance_obj
  
  
  def fake_db_instance(**updates):
      db_instance = {
          'id': 1,
          'deleted': False,
          'uuid': str(uuid.uuid4()),
          'user_id': 'fake-user',
          'project_id': 'fake-project',
          'host': 'fake-host',
          'created_at': datetime.datetime(1955, 11, 5),
          }
      for field, typefn in instance_obj.Instance.fields.items():
          if field in db_instance:
              continue
          try:
              db_instance[field] = typefn(None)
          except TypeError:
              db_instance[field] = typefn()
  
      if updates:
          db_instance.update(updates)
      return db_instance
  
new_contents: #    Copyright 2013 IBM Corp.
  #
  #    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 uuid
  
  from nova.objects import instance as instance_obj
  
  
  def fake_db_secgroups(instance, names):
      secgroups = []
      for i, name in enumerate(names):
          secgroups.append(
              {'id': i,
               'instance_uuid': instance['uuid'],
               'name': 'secgroup-%i' % i,
               'description': 'Fake secgroup',
               'user_id': instance['user_id'],
               'project_id': instance['project_id'],
               'deleted': False,
               'deleted_at': None,
               'created_at': None,
               'updated_at': None,
               })
      return secgroups
  
  
  def fake_db_instance(**updates):
      db_instance = {
          'id': 1,
          'deleted': False,
          'uuid': str(uuid.uuid4()),
          'user_id': 'fake-user',
          'project_id': 'fake-project',
          'host': 'fake-host',
          'created_at': datetime.datetime(1955, 11, 5),
          }
      for field, typefn in instance_obj.Instance.fields.items():
          if field in db_instance:
              continue
          try:
              db_instance[field] = typefn(None)
          except TypeError:
              db_instance[field] = typefn()
  
      if updates:
          db_instance.update(updates)
  
      if db_instance.get('security_groups'):
          db_instance['security_groups'] = fake_db_secgroups(
              db_instance, db_instance['security_groups'])
  
      return db_instance
  
subject: Make fake_instance handle security groups