A simple decorator in Ruby powered by method_missing

simple_decorator.rb

class Thing
  def foo
    puts "I'm a foo"
  end
  
  def bar  
    puts "I'm a bar"
  end
  
  def baz  
    puts "I'm a baz"
  end
end

class ThingDecorator
  def initialize
    @thing = Thing.new
  end

  def method_missing(method_name)
    if @thing.respond_to?(method_name)
      @thing.send(method_name)
    else
      puts "Can't call #{method_name.to_sym} as it doesn't exist on thing"
    end
  end
end

td = ThingDecorator.new
td.foo