rspec users - Apr 2010 - Speccing the creation of a singleton resource

Hey guys. I''m writing a Rails gem that''s used by controllers.
The gem
creates a singleton resource at run-time, along the lines of:


controller_name = ...dynamically generated...

ActionController::Routing::Routes.draw do |map|
    map.resource controller_name, :only => :show
end


I''m trying to figure out how to spec the creation of the singleton
resource. The best that I''ve come up with so far is checking that a
route exists:

ActionController::Routing::Routes.routes.last.defaults[:controller].should
== controller_name.to_s

However, that doesn''t test whether or not it''s a singleton
resource.

Any suggestions? Thanks,
Nick