Testing Virtual Service With Port-forward

I am looking to test a virtual service. I would like to test it’s authenticatio/authorization and it has a grpc-web envoy filter underneath. Without istio, I would have port-forwarded to a service to test it. Is there an equivalent way with istio to expose the a virtual service so that it may be tested in that manner?

hello @bking did you manage to find this? im at similar stage actually, if you did manage to do it kindly share it