From: Dave Rothlisberger <dave@...>
Date: 2008-05-15T08:24:30+09:00
Subject: Re: Override methods from a module

> Please let me know if this makes sense/how this could be improved.
>
> 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

A slightly nicer way to write the above:

module Stuff
  def self.included(mod)
    mod.class_eval do
      alias_method_chain :setup, :new_feature
    end
  end

  def setup_with_new_feature
    setup_without_new_feature
    puts 'new setup'
  end

  def teardown_with_new_feature
    teardown_without_new_feature
    puts 'new teardown'
  end
end
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