From: Drew Olson <olsonas@...>
Date: 2007-10-16T08:52:17+09:00
Subject: Re: Override methods from a module

Drew Olson wrote:
> Your examples definitely help and may have helped me with another way of 
> looking at the problem but I'm not sure they'll work as my objects are 
> already extending parent objects.
> 
> - Drew

Sorry about the previous response. Apparently lack of sleep results in 
horrendous grammar. Below is the solution I've figured out for the 
problem. It seems to work the way I was hoping for. Please let me know 
if this makes sense/how this could be improved.

Thanks,
Drew

module Stuff
  def self.included mod
    @@mixer_class = mod
  end

  def initialize
    super
    @@mixer_class.class_eval do
      alias_method :old_setup, :setup
      alias_method :old_teardown, :teardown

      define_method(:setup) do
        old_setup
        puts "new setup"
      end

      define_method(:teardown) do
        old_teardown
        puts "new teardown"
      end
    end
  end
end

class Tester
  def common
    puts "this is in all tests!"
  end
end


class PlainTester < Tester
  def setup
    puts "plain setup"
  end

  def teardown
    puts "plain teardown"
  end
end

class ExtraFunTester < Tester
  include Stuff
  def setup
    puts "old setup"
  end

  def teardown
    puts "old teardown"
  end
end

p = PlainTester.new
e = ExtraFunTester.new

p.setup
p.teardown

e.setup
e.teardown
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