if Rails.env.features? || Rails.env.test?
  ActiveRecord::Base.class_eval do
    class << self
      def delete_all_of_all
        @model_subclasses_for_delete_all_of_all.each do |klass|
          klass.delete_all
        end
      end
      def inherited_with_model_tracker(subclass)
        @model_subclasses_for_delete_all_of_all ||= []
        @model_subclasses_for_delete_all_of_all << subclass
        inherited_without_model_tracker(subclass)
      end
      alias_method_chain :inherited, :model_tracker
    end
  end
end