Poopin'

poop.rb

class Poop
  class << self
    def outta_my_butt
     "( 0 )"
    end
  end
  # or for all you hipsters
  # def self.outta_my_butt
  #   "( 0 )"
  # end
 

  def doesnt_go_there
     "( X )"
  end
end

Poop.outta_my_butt

poop = Poop.new
poop.doesnt_go_there

Poop.doesnt_go_there # undefined method

let(:poop) { mock_model(Poop) }
poop.stub(:doesnt_go_there).and_return("whoops")