route_spec.rb

describe "routes to the articles controller" do
  extend RouteSpecHelpers

  scope_options controller: 'articles', blog: 'my_blog'

  get '/blogs/my_blog/articles/new' => { action: 'new' }
  post '/blogs/my_blog/articles'    => { action: 'create' }
  get '/blogs/my_blog/articles/1'   => {action: 'show', id: '1' }


end


# routes to the articles controller
#   should route GET /blogs/my_blog/articles/new to {:controller=>"articles", :blog => "my_blog", :action=>"new"}
#   should route POST /blogs/my_blog/articles to {:controller=>"articles", :blog=>"my_blog", :action=>"create"}
#   should route GET /blogs/my_blog/articles/1 to {:controller=>"articles", :blog=>"my_blog", :action=>"show", :id=>"1"}

route_spec_helper.rb

module RouteSpecHelpers

  def scope_options(options={})
    before do
      @routing_scope = options
    end
  end


  [:get, :post, :put, :delete].each do |method|
    define_method method do |route|
      specify_route(method, route)
    end
  end


  RSpec::Matchers.define :route_to_here do |route_options|
    match_unless_raises Test::Unit::AssertionFailedError do |path|
      assertion_path = { :method => path.keys.first, :path => path.values.first }
      assert_recognizes(route_options, assertion_path)
    end

    failure_message_for_should do
      rescued_exception.message
    end

    description do |path|
      "route #{path.keys.first.upcase} #{path.values.first} to #{route_options.inspect}"
    end
  end



  private

  def specify_route(method, route)
    specify do
      path = route.keys.first
      routing_options = route.values.first
      routing_options = (@routing_scope || {}).merge(routing_options)
      { method => path }.should route_to_here(routing_options)
    end
  end


end