Ruby で super を呼んだ時の呼ばれる順番 ref: http://qiita.com/closer/items/5b90aaf115b4d113fe2a

file0.txt

("A".."H").each do |name|
  eval <<-MODULE
    module #{name}
      def hoge
        "#{name} -> " + super
      end
    end
  MODULE
end

class Base
  def hoge
    "Base"
  end
end

class TestClass < Base
  include A
  include B
  def hoge
    "TestClass -> " + super
  end
  include C
  include D
end

t = TestClass.new
t.extend E
t.extend F
def t.hoge
  "t -> " + super
end
t.extend G
t.extend H

p t.hoge #=> "t -> H -> G -> F -> E -> TestClass -> D -> C -> B -> A -> Base"

class TestClass2 < TestClass
  include A
  include B
  def hoge
    "TestClass2 -> " + super
  end
  include C
  include D
end

t = TestClass2.new
p t.hoge #=> "TestClass2 -> TestClass -> D -> C -> B -> A -> Base"