Ruby Module - Private, Public method

module_private_public.rb

module Bar
  def self.included(base)
    class << base
      def public_method # public method
        puts "public method"
      end

      def call_private # public method
        puts "Call Private from Public"
        private_method
      end

      private
      def private_method
        puts "Private method"
      end
    end
  end

  def module_method 
    puts "module method"
  end

  def call_module_private_method
    puts "Call module private method from module inst"
    module_private_method
  end

  private 
  def module_private_method
    puts "module private method"
  end
end

class Foo
  include Bar
end

Foo.public_method
Foo.call_private
Foo.private_method # fail
Foo.new.module_method
Foo.new.call_module_private_method
Foo.new.module_private_method # fail