test objects design

I was thinking about what I call FUNTOM but more and more I call it Semantic Test Objects. Here is my example unofolding towards an MVC type framework for using Watir as my view through some adapters.

#example of class as Semantic Test Object which has mixing of module providing behaviour.
# This sould be a strategy pattern type thinking but who knows.
# it's just my investigations into watir implementation
module DefaultBehavior
  def wag
    puts 'default wag left to right'
    # here call Watir Adapters to delegate actions to the webpage
  end
  def bark
    puts 'woof woof default bark'
  end
end

module SpecialBehavior
  include DefaultBehavior
  def bark
    puts 'raah raah special bark'
  end
end

class DogAsTestModel
  include DefaultBehavior
end

DogAsTestModel.new.wag
DogAsTestModel.new.bark

class DogAsTestModel
  include SpecialBehavior
end

DogAsTestModel.new.wag
DogAsTestModel.new.bark

class DogAsTestModel
  include SpecialBehavior
  def bark
    puts 'overwrite bark. Woooooof Woooooof'
  end
end

DogAsTestModel.new.wag
DogAsTestModel.new.bark

The idea is that class represents Semantic Test Object. It could be a collection of objects on a page.
more to come I hope.