border-*-width-036/047 (etc.?) make invalid assumptions about rounding from L. David Baron on 2010-10-14 (public-css-testsuite@w3.org from October 2010)

From: L. David Baron <dbaron@dbaron.org>
Date: Thu, 14 Oct 2010 00:37:45 -0700
To: public-css-testsuite@w3.org
Message-ID: <20101014073745.GA20093@pickering.dbaron.org>

There are a bunch of border-related tests that fail in Gecko because
the tests make invalid assumptions about rounding behavior.  Gecko
has rounding behavior that has served us very well on the Web:  we
have different rounding behavior for border-widths (where
pixel-width consistency is important) than for most other
dimensions.  (This different behavior is shared by outline widths
and hopefully soon by line heights.)

The following tests fail in Gecko, despite Gecko's behavior being
valid according to the spec:

border-bottom-width-036
border-bottom-width-047
border-left-width-036
border-left-width-047
border-right-width-036
border-right-width-047
border-top-width-036
border-top-width-047

I suspect numerous other tests make the same assumptions, though.

-David

-- 
L. David Baron                                 http://dbaron.org/
Mozilla Corporation                       http://www.mozilla.com/

Received on Thursday, 14 October 2010 07:38:15 UTC