Quick and dirty A/B testing Rails views

ab_helper.rb

module ABHelper

  def choose_test(name, default_option,  *options)
    key = "#{name}_ab"
    unless current_test = (params[key] || session[key] || cookies[key])
      current_test = options[rand(options.count)]
    end
    current_test = default_option unless options.include?(current_test)
    session[key] = cookies.permanent[key] = current_test
  end

end

Thanks for posting this. After playing around with Simple ABs and Abingo, I used this as the start of my own homegrown approach.