class method self.included

# File activesupport/lib/active_support/testing/setup_and_teardown.rb, line 6
      def self.included(base)
        base.class_eval do
          include ActiveSupport::Callbacks
          define_callbacks :setup, :teardown

          if defined?(MiniTest::Assertions) && TestCase < MiniTest::Assertions
            include ForMiniTest
          else
            include ForClassicTestUnit
          end
        end
      end