ruby 我自己测试Ruby类，对象以及它们如何组合在一起，继承等等。

Posted 2021-05-16

class AParent
  attr_reader :hello
end

class Outer
  attr_reader :inner
  
  def initialize( inner )
    @inner = inner
  end
  
  def lol
    'lulz'
  end
end

class Inner < AParent
  def hi
    'there'
  end
end

inner = Inner.new
outer = Outer.new inner