debug_html

debug_html can be used to save HTML to a temporary file and open it in a web browser for inspection. It's like save_and_open_page in capybara.

Put this somewhere in your code to open the default web browser to render the HTML code.

require 'debug_html'
DebugHTML.save_and_open(html)

You could also do something else instead of opening a web browser.

require 'debug_html'
path = DebugHTML.save(html)