testing cookie deletes in rails

gistfile1.rb

describe MyController do
  let(:cookies) { mock('cookies') }
  
  context "when my page is visited" do
    it "should delete my cookie" do
       controller.stub!(:cookies).and_return(cookies)

       cookies.should_receive(:delete).with(cookie, :domain => '.mydomain.com')

       get "my_action"
    end
  end
end