gistfile1.rb

should "fail if an expected parameter is not found" do                         
  class InteractionExpectingParameter < Less::Interaction                                         
    expects :title, String                                                             
                                                                               
    def run                                                                    
    end                                                                        
  end                                                                          
  assert_raise(MissingParameterError) { InteractionExpectingParameter.run }    
end