# File lib/test/unit/assertions.rb, line 1328
      def assert_empty(object, message=nil)
        _wrap_assertion do
          assert_respond_to(object, :empty?,
                            "The object must respond to :empty?.")
          full_message = build_message(message,
                                       "<?> expected to be empty.",
                                       object)
          assert_block(full_message) do
            object.empty?
          end
        end
      end