ClassMethods test

class_methods.rb

module M1
  class << self
    def included(klass)
      p klass
      klass.extend ClassMethods
    end
  end
  
  def method_i
    p 'InstanceMethodですよー'
  end
  
  module ClassMethods
    def method_c
      p 'ClassMethodsからきましたよー'
    end
  end
end

class C1
  include M1
end

C1.method_c
C1.new.method_i