def test_create_with_subnet(self, **optionals):
        with patch('octavia.common.validate.get_network_driver') as net_mock:
            net_mock.return_value.get_subnet = \
                mock.Mock(side_effect = network_base.
                          SubnetNotFound('Subnet not found'))
            lb_json = {'name': 'test1', 'vip':
                {'subnet_id':uuidutils.generate_uuid(),
                 'ip_address':'10.0.0.1'}}
            lb_json.update(optionals)
            response = self.post(self.LBS_PATH, lb_json, expect_errors=True)