response_from_page_or_rjs

# File actionpack/lib/action_controller/assertions/selector_assertions.rb, line 601
        def response_from_page_or_rjs()
          content_type = @response.content_type

          if content_type && Mime::JS =~ content_type
            body = @response.body.dup
            root = HTML::Node.new(nil)

            while true
              next if body.sub!(RJS_STATEMENTS[:any]) do |match|
                html = unescape_rjs(match)
                matches = HTML::Document.new(html).root.children.select { |n| n.tag? }
                root.children.concat matches
                ""
              end
              break
            end

            root
          else
            html_document.root
          end
        end