},
				},
			},
		},
		{
			name:  "patch add gateway listener",
			proxy: gatewayProxy,
			fields: fields{
				GatewayListeners: []*listener.Listener{
					{
						Name: "gateway-listener",
					},
				},
			},
			want: fields{
				GatewayListeners: []*listener.Listener{
					{
						Name: "gateway-listener",
					},
					{
						Name: "new-gateway-listener",
					},
				},

	lb.envoyFilterWrapper = lb.push.EnvoyFilters(lb.node)
	if lb.envoyFilterWrapper == nil {
		return
	}

	if lb.node.Type == model.Router {
		lb.gatewayListeners = envoyfilter.ApplyListenerPatches(networking.EnvoyFilter_GATEWAY, lb.envoyFilterWrapper,
			lb.gatewayListeners, false)
		return
	}

	lb.virtualOutboundListener = lb.patchOneListener(lb.virtualOutboundListener, networking.EnvoyFilter_SIDECAR_OUTBOUND)

		log.Info(err.Error())
	}

	if len(mutableopts) == 0 {
		log.Warnf("gateway has zero listeners for node %v", builder.node.ID)
		return builder
	}

	builder.gatewayListeners = listeners
	return builder
}

func (configgen *ConfigGeneratorImpl) buildGatewayTCPBasedFilterChains(
	builder *ListenerBuilder,
	p protocol.Instance, port model.ServerPort,
	opts *gatewayListenerOpts,