W3C home > Mailing lists > Public > public-css-testsuite@w3.org > September 2006

RE: pixel-based vs. real-word-pased units

From: Ian Hickson <ian@hixie.ch>
Date: Tue, 12 Sep 2006 00:18:21 +0000 (UTC)
To: Peter Sorotokin <psorotok@adobe.com>
Cc: public-css-testsuite@w3.org
Message-ID: <Pine.LNX.4.62.0609120012020.11485@dhalsim.dreamhost.com>

On Mon, 11 Sep 2006, Peter Sorotokin wrote:
> > 
> > Not making that assumption breaks all kinds of Web pages. There was a 
> > time several years ago where Mac browsers assumed 72dpi, and they were 
> > universally having difficulties with important Web sites.
> Hey, I am implementing the spec. Does the test suite test the compliance 
> with the spec or the ability to render real-world Web content?

The test suite is primarily written by browser vendors and therefore 
primarily tests for CSS compliance in a Web context, which includes making 
certain assumptions that are required for rendering Web content.

I would be happy to add a flag to the filename to indicate that the test 
assumes Web browser characteristics (though that would probably flag most 
tests -- all of them, if you consider HTML support to be a Web browser 
characteristic). I would also be happy to accept tests that don't make 
those assumptions. To contribute such tests, please see:


It would be great to get tests from implementors who aren't Web browser 
vendors, since, as you imply, that has resulted in a bias in the test 
suite so far.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Tuesday, 12 September 2006 00:19:27 UTC

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