CSS Testing

Justin justin.obara at utoronto.ca
Wed Jan 21 16:42:43 UTC 2009

Hi Jacob,

Comparing images tends to be extremely brittle. Even a single pixel  
different means the pictures are not equivalent. Now consider a web  
page where the size and placement of content is highly dependent on  
the browser size.

I have attached a screen shot I took a while back when I ran into a  
problem while testing the robot automation. The image shows the same  
page opened in FF2 and FF3. Notice the difference in size of the  
portlets. The browsers both had the same size.

I've quickly looked at github, but am not sure I quite understand what  
they are doing. It seems that they are using two approaches. 1) to  
compare images 2) compare the rendered DOM values against expected  

It seems that the second approach would be more feasible, but I'm  
guessing you would still have a problem with the example illustrated  
in the attachment.

- Justin

On 21-Jan-09, at 11:08 AM, Jacob Farber wrote:

> Has anyone ever done automated testing for CSS before? If so, have  
> you heard of http://github.com/garethr/css-test/tree/master or  
> comparing a rendered webpage image to an master image? I would be  
> interested to hear about any experiences you may have had with this  
> technique.
> Thanks
> Jacob
> -- 
> Jacob Farber
> University of Toronto - ATRC
> Tel: (416) 946-3002
> www.fluidproject.org
> _______________________________________________________
> fluid-work mailing list - fluid-work at fluidproject.org
> To unsubscribe, change settings or access archives,
> see http://fluidproject.org/mailman/listinfo/fluid-work

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://fluidproject.org/pipermail/fluid-work/attachments/20090121/6166be30/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Picture 1.png
Type: image/png
Size: 171647 bytes
Desc: not available
URL: <http://fluidproject.org/pipermail/fluid-work/attachments/20090121/6166be30/attachment.png>

More information about the fluid-work mailing list