body: //*[contains(@class, 'post_content')]
author: string('Kaelig Deloumeau-Prigent')
title: //h1[@class='title']
date: //span[@class='date']
test_url: http://blog.kaelig.fr/post/24877648508/pr%C3%A9processeurs-css-renoncer-par-choix-ou-par
