#!/usr/bin/env ruby
# encoding: utf-8

class C
  class << self
    def public_method
      puts 'I am a public method, calling private method'
      private_method
    end

    private

    def private_method
      puts 'I am a private method'
    end
  end
end

module M1
  class << self
    def public_method
      puts 'I am a public method, calling private method'
      private_method
    end

    private

    def private_method
      puts 'I am a private method'
    end
  end
end

module M2
  module_function

  def public_method
    puts 'I am a public method, calling private method'
    private_method
  end

  private

  def private_method
    puts 'I am a private method'
  end
end

module M3 # ok
  extend self

  def public_method
    puts 'I am a public method, calling private method'
    private_method
  end

  private

  def private_method
    puts 'I am a private method'
  end
end

class C1; extend M1; end
class C2; extend M2; end
class C3; extend M3; end

class C1_; include M1; end
class C2_; include M2; end
class C3_; include M3; end

cases =  ['C', 'M'].map { |prefix| ['', *(1..3)].map { |suffix| ["#{prefix}#{suffix}_", "#{prefix}#{suffix}"] } }.flatten

cases.each do |testcase|
  if Object.const_defined?(testcase)
    begin
      klass = Object.const_get(testcase)
      puts "#{testcase}.public_method"
      klass.public_method
    rescue
      puts "\033[31mCase raised: #{testcase}\033[0m"
    end
  end
end