# File lib/action_dispatch/testing/assertions/tag.rb, line 98
      def assert_tag(*opts)
        opts = opts.size > 1 ? opts.last.merge({ :tag => opts.first.to_s }) : opts.first
        tag = find_tag(opts)
        assert tag, "expected tag, but no tag found matching #{opts.inspect} in:\n#{@response.body.inspect}"
      end