Rails - Oct 2005 - action_controller/assertions error

HI all,
I''m using action controller 1.9.1.

In a controller test,

  def test_base_route
    assert_routing "http://#{@request.host}/user/login",
''''
  end


results in this error:
Started
E.
Finished in 0.172 seconds.

  1) Error:
test_base_route(UserControllerTest):
NoMethodError: undefined method `stringify_keys!'' for
"":String
   
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.9.1/lib/action_controller/assertions.rb:129:in
`assert_recognizes''
   
C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.9.1/lib/action_controller/assertions.rb:158:in
`assert_routing''
   
D:/svn-sandboxFSFS/ruby/routetest/test/functional/user_controller_test.rb:20:in
`test_base_route''


I looked for a matching ticket in rails trac and didn''t find anything.

Ideas ?

Thanks,

Peter Fitzgibbons