code: def render_html_report(summary, report_template=None, report_dir=None):
      
      if not report_template:
          report_template = os.path.join(
              os.path.abspath(os.path.dirname(__file__)),
              "templates",
              "report_template.html"
          )
          logger.log_debug("No html report template specified, use default.")
      else:
          logger.log_info("render with html report template: {}".format(report_template))
  
      logger.log_info("Start to render Html report ...")
  
      report_dir = report_dir or os.path.join(os.getcwd(), "reports")
      if not os.path.isdir(report_dir):
          os.makedirs(report_dir)
  
      start_at_timestamp = int(summary["time"]["start_at"])
      summary["time"]["start_datetime"] = datetime.fromtimestamp(start_at_timestamp).strftime('%Y-%m-%d %H:%M:%S')
  
      report_path = os.path.join(report_dir, "{}.html".format(start_at_timestamp))
  
      with io.open(report_template, "r", encoding='utf-8') as fp_r:
          template_content = fp_r.read()
          with io.open(report_path, 'w', encoding='utf-8') as fp_w:
              rendered_content = Template(
                  template_content,
                  extensions=["jinja2.ext.loopcontrols"]
              ).render(summary)
              fp_w.write(rendered_content)
  
      logger.log_info("Generated Html report: {}".format(report_path))
  
      return report_path
docs: render html report with specified report name and template
  
      Args:
          report_template (str): specify html report template path
          report_dir (str): specify html report save directory