I believe the Java Selenium driver can take screenshots. No idea about
performing comparisons.

Kaldari

On Mon, Mar 10, 2014 at 2:04 PM, Jon Robson <jdlrobson@gmail.com> wrote:

> I just wondered if anyone doing MediaWiki development had any
> experience in catching CSS regressions?
>
> We have had a few issues recently in mobile land where we've made big
> CSS changes and broken buttons on hidden away special pages -
> particularly now we have been involved in the development of mediawiki
> ui and moving mobile towards using them.
>
> My vision of how this might work is we have an automated tool that
> visits a list of given pages on various browsers, take screenshots of
> how they look and then compares the images with the last known state.
> The tool checks how similar the images are and complains if they are
> not the same - this might be a comment on the Gerrit patch or an
> e-mail saying something user friendly like "The Special:Nearby page on
> Vector looks different from how it used to. Please check everything is
> okay."
>
> This would catch a host of issues and prevent a lot of CSS regression bugs.
>
> Any experience in catching this sort of thing? Any ideas on how we
> could make this happen?
>
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