latte art

gistfile1.rb

class Coffee
  def cost
    2.0
  end

  def origin
    "Columbia"
  end
end

class MilkDecorator
  def initialize(drink)
    @drink = drink
  end

  def cost
    @drink.cost + 0.4
  end

  def method_missing(meth, *args)
    if @drink.respond_to?(meth)
      @drink.send(meth, *args)
    else
      super
    end
  end

  def respond_to?(meth)
    @drink.respond_to?(meth)
  end
end

class SugarDecorator
  def initialize(drink)
    @drink = drink
  end

  def cost
    @drink.cost + 0.2
  end

  def method_missing(meth, *args)
    if @drink.respond_to?(meth)
      @drink.send(meth, *args)
    else
      super
    end
  end

  def respond_to?(meth)
    @drink.respond_to?(meth)
  end
end