class method self.included

# File activesupport/lib/active_support/testing/setup_and_teardown.rb, line 12
      def self.included(base)
        base.class_eval do
          include ActiveSupport::Callbacks
          define_callbacks :setup, :teardown

          if defined?(::Mini)
            undef_method :run
            alias_method :run, :run_with_callbacks_and_miniunit
          else
            begin
              require 'mocha'
              undef_method :run
              alias_method :run, :run_with_callbacks_and_mocha
            rescue LoadError
              undef_method :run
              alias_method :run, :run_with_callbacks_and_testunit
            end
          end
        end
      end