# File lib/fog/aws/requests/elb/set_load_balancer_policies_of_listener.rb, line 43
        def set_load_balancer_policies_of_listener(lb_name, load_balancer_port, policy_names)
          raise Fog::AWS::ELB::NotFound unless load_balancer = self.data[:load_balancers][lb_name]

          policy_names = [*policy_names]
          response = Excon::Response.new
          if policy_names.size > 1
            response.status = 409
            response.body = "<?xml version=\"1.0\"?><Response><Errors><Error><Code>InvalidConfigurationRequest</Code><Message>Requested configuration change is invalid.</Message></Error></Errors><RequestID>#{Fog::AWS::Mock.request_id}</RequestId></Response>"
            raise Excon::Errors.status_error({:expects => 200}, response)
          end

          unless listener = load_balancer['ListenerDescriptions'].find { |listener| listener['Listener']['LoadBalancerPort'] == load_balancer_port }
            response.status = 400
            response.body = "<?xml version=\"1.0\"?><Response><Errors><Error><Code>ListenerNotFound</Code><Message>LoadBalancer does not have a listnener configured at the given port.</Message></Error></Errors><RequestID>#{Fog::AWS::Mock.request_id}</RequestId></Response>"
            raise Excon::Errors.status_error({:expects => 200}, response)
          end

          unless load_balancer['Policies']['Proper'].find { |policy| policy['PolicyName'] == policy_names.first }
            response.status = 400
            response.body = "<?xml version=\"1.0\"?><Response><Errors><Error><Code>PolicyNotFound</Code><Message>One or more specified policies were not found.</Message></Error></Errors><RequestID>#{Fog::AWS::Mock.request_id}</RequestId></Response>"
            raise Excon::Errors.status_error({:expects => 200}, response)
          end if policy_names.any?

          listener['PolicyNames'] = policy_names

          response.status = 200
          response.body = {
            'ResponseMetadata' => {
              'RequestId' => Fog::AWS::Mock.request_id
            }
          }

          response
        end