I posted this to a Ruby forum a while ago.
I got controllers in a namespace and controllers outside of the namespace. For example, I have a PagesController and a Admin::PagesController. When I run rspec from the top, tests pass and I get the following warning: spec/controllers/admin/pages_controller_spec.rb:4: warning: toplevel constant PagesController referenced by Admin::PagesController. This makes no sense. I do have a PagesController and an Admin::PagesController and specs for both that are declared properly.
This was only happening under Spork, so I posted a similar question to the sporkgem list.
I also found a workaround, to require the Admin controllers first in spec/spec_helper.rb.
Finally, @tilsammans figured it out. It’s the same problem as what I have: an Admin namespace and an Admin class.
It was because I also had a class Admin, as well as a namespace Admin. Since Admin was a class (a model) it inherited from Object which made the top-level ApplicationController available inside the Admin namespace. The reply by Andrew White on _ _http://groups.google.com/group/rubyonrails-core/browse_thread/thread/bab5e87ee10d2ecb_ lead me to find the right answer. In the end I renamed Admin to AdminUser and everything fell into place._
This is rather counterintuitive and one would think Ruby should somehow handle this situation, but it at least makes technical sense.