html_document

# File actionpack/lib/action_dispatch/testing/assertions.rb, line 16
    def html_document
      @html_document ||= if @response.content_type.to_s.end_with?("xml")
        Nokogiri::XML::Document.parse(@response.body)
      else
        Nokogiri::HTML::Document.parse(@response.body)
      end
    end