Featuring Puppeteer, headless Chrome and Python image diffing

pip install visualdiff

Create your tests calling visualdiff.compare(url), this will drive a headless Chrome session rendering the desired URL and comparing the resulting image with an expected one.

The expectation are stored by default in a visualdiff subfolder of the current calling test script.

There are several additional options you can use, we'll see them in the examples

import visualdiff as vd

assert not vd.difference('https://example.com')

• It is a long time that I wanted a tool like this one, but thanks to this article from Monica Dinculescu for finally convincing me.
• Thanks to Mijakogi for the outstanding work on Pyppeteer