Rails - Mar 2006 - assert_redirected_to behaviour

Consider following situation: you''ve got controller Foo that has 
following routing rules related:

map.connect ''/foo'', :controller => ''foo'',
:action => ''index''
map.foo ''/foo/:x/:y/:z/:action'', :controller =>
''foo''

You want all Foo actions to make use of partial url rewriting, so 
instead of writing:

def bar
  # params[:x], params[:y] and params[:z] contain action parameters
  redirect_to :action => ''baz'', :x => params[:x], :y
=> params[:y], :z
=> params[:z]
end

you could write just

def bar
  redirect_to :action => ''baz''
end

and have all those x, y and z parameters inherited from bar action.
So far, rails has that feature available.

Then you write a functional test something like this:

def test_bar
  get :bar, :x => 1, :y => 5, :z => 2
  assert_redirected_to :action => :baz, :x => 1, :y => 5, :z => 2
end

As far as I see, now assert_redirected_to only matches parameters 
supplied to it with parameters supplied to redirect_to method. I think, 
that assert should work something like this:

1. construct url with parameters supplied for redirect_to method
2. ask routing to recognize the url and get the parameters
3. match resulting parameters with parameters supplied for 
assert_redirected_to

Any objections ?

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