routing_test.rb

require 'rubygems'
require 'action_controller'
require 'test/unit'

class AccountsController < ActionController::Base
end

# Your mission, should you choose to accept it: Change the RouteSet (in the
# with_route_set method) so as to make both tests pass.
class RoutingTest < ActionController::TestCase
  def test_named_route
    with_route_set do
      assert_routing '/accounts/new', hash_for_named_route(:new_account)
    end
  end

  def test_named_route_adding_an_optional_parameter
    with_route_set do
      assert_routing '/accounts/new/CODE', hash_for_named_route(:new_account).merge(:account => { :invitation_code => 'CODE'})
    end
  end

  private

  def hash_for_named_route(named_route)
    send("hash_for_#{named_route}_path").except(:only_path, :use_route)
  end

  def with_route_set
    with_routing do |set|
      set.draw do |map|
        # You're free to change from here...
        map.resources :accounts
        # ... to here. That's it.
      end

      begin
        set.named_routes.install(metaclass)
        yield
      ensure
        # We should find a way to "uninstall" the named routes here.
      end
    end
  end
end