rspec users - Mar 2008 - How to spec controller whose route has a different name?

Perhaps I am missing something extremely obvious, but I am unable to  
get my specs to work for an ArticlesController which is accessed using  
URLs like "/wiki/foo".

Here''s the corresponding line from config/routes.rb:

   map.resources :wiki, :controller => ''articles''

This is Rails 2.0.2, but in the next release that will be:

   map.resources :articles, :as => :wiki

And here is a very short excerpt from the specs:

   describe ArticlesController do
     describe ''GET /wiki/new'' do
       before do
         @article = mock_model Article
         Article.stub!(:new).and_return(@article)
       end

       def do_get
         get :new        # doesn''t work
         #get ''new''       # doesn''t work either
         #get ''/wiki/new'' # doesn''t work either
       end

       it ''should succeed'' do
         do_get
         response.should be_success
       end
     end
   end

In specs where the controller uses totally "normal" routing, RSpec  
seems to correctly infer that when I "describe ThingController" and  
then do "get :new" then I am talking about doing a GET of
"/thing/
new". But that doesn''t seem to be happening in this case (all the
specs fail) and I can''t seem to figure out how to make it work. I  
tried setting an explicit controller_name but it didn''t help.

Any suggestions?

Cheers,
Wincent