Bypass encapsulation to test private methods (Ruby)

bypass.rb

# This allows you to be a good OOP citizen and honor encapsulation, but
# still make calls to private methods (for testing) by doing
#
#   obj.bypass.private_thingie(arg1, arg2)
#
# Which is easier on the eye than
#
#   obj.send(:private_thingie, arg1, arg2)
#
class Object
  class Bypass
    instance_methods.each do |m|
      undef_method m unless m =~ /^__/
    end

    def initialize(ref)
      @ref = ref
    end
  
    def method_missing(sym, *args)
      @ref.__send__(sym, *args)
    end
  end

  def bypass
    Bypass.new(self)
  end
end