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Creating reftests for tests involving half of the unpredictable width of another element; reftests for c43-rpl-bbx-002 and c43-rpl-ibx-000

From: Gérard Talbot <css21testsuite@gtalbot.org>
Date: Tue, 13 Dec 2011 21:08:18 -0800
Message-ID: <4da2a62ebab0423bf739f27c2b8ac7fa.squirrel@gtalbot.org>
To: "Public CSS test suite mailing list" <public-css-testsuite@w3.org>
Hello,

Some tests

http://test.csswg.org/suites/css2.1/nightly-unstable/html4/c43-center-000.htm

http://test.csswg.org/suites/css2.1/nightly-unstable/html4/c43-rpl-bbx-000.htm

http://test.csswg.org/suites/css2.1/nightly-unstable/html4/c43-rpl-bbx-001.htm

involve a precise measurement of half of the current window viewport or
rather the available document box width. Now, the available width for
the element to center or to use width: 50% may be odd and may then lead
to the fractional pixel.

Some properties do not round fractional values the same way as others.
So, for all these reasons, it's not possible to do reftests for these.

c43-center-000 has already a real, confirmed fractional pixel issue.

----------

Also, as coded, right now, it's impossible to do reftests for

http://test.csswg.org/suites/css2.1/nightly-unstable/html4/c43-rpl-bbx-002.htm
and
http://test.csswg.org/suites/css2.1/nightly-unstable/html4/c43-rpl-ibx-000.htm

regards, Gérard
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Received on Wednesday, 14 December 2011 05:11:28 GMT

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