When to pass view id to FacesRequest/NonFacesRequest ?

[hubaghdadi]

Hi.
FacesRequest and NonFacesRequest classes have two constructors, one that accepts no parameters and one that accepts view id (well, a third constructor exits).
For writing integration tests, when I have to pass the view id to FacesRequest and NonFacesRequest? any rule?
Thanks.

[pmuir]

If you want to attach the FacesRequest to a particular view e.g. to use page parameters/page actions.