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[RC6] absolute-non-replaced-height-001: difficult text assert and removing such test

From: Gérard Talbot <css21testsuite@gtalbot.org>
Date: Mon, 27 Aug 2012 21:55:41 -0400
Message-ID: <3fbdf9752b7f8999718f4b670fa999b9.squirrel@ed-sh-cp3.entirelydigital.com>
To: "Arron Eicholz" <arron.eicholz@microsoft.com>
Cc: "Public CSS test suite mailing list" <public-css-testsuite@w3.org>
Arron,

[RC6]
http://test.csswg.org/suites/css2.1/20110323/html4/absolute-non-replaced-height-001.htm


line 8 <meta name="assert" content="The calculation of static position
is based on initial containing block when there is a fixed positioned
element." />

There are 2 ideas (somewhat confused and mixed up) expressed in that
assert text:

1st idea is that the containing block of an element with its 'position'
set to 'fixed' is the viewport; the initial containing block has the
dimensions of the viewport.

"
If the element has 'position: fixed', the containing block is
established by the viewport
"
10.1 Definition of "containing block"
http://www.w3.org/TR/CSS21/visudet.html#containing-block-details

2nd idea is that static position is given, is determined "by the
distance from the top edge of the containing block to the top margin
edge of a hypothetical box that would have been the first box of the
element if its specified 'position' value had been 'static' and its
specified 'float' had been 'none' and its specified 'clear' had been
'none'."
10.6.4 Absolutely positioned, non-replaced elements
http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-height

The inner div in the test has 'top: auto' and 'left: auto' ... although
the test code does not explicitly declare those.

The test assert text does not make sense.

The static position for any absolutely positioned element (with
'position: absolute' or with 'position: fixed') is still the same: it is
given, determined "by the distance from the top edge of the containing
block to the top margin edge of a hypothetical box that would have been
the first box of the element if its specified 'position' value had been
'static' and its specified 'float' had been 'none' and its specified
'clear' had been 'none'."
The static position for an element with 'position: absolute' or with
'position: fixed' is given by the position it would have had in normal
flow.

The 'position: fixed' in the test has no relation, no incidence on the
test.

It is only when and if box offsets (top, left, bottom, right) are
non-auto and computable that we need to take into consideration what is
its containing block (according to section 10.1).

I have examined the test and I have no idea how to rehabilitate it, no
proposal for replacement. The goal/purpose/target/pursued idea of the
test is just not clear to me.

I believe this test should be removed.

Gérard
-- 
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CSS 2.1 Test suite RC6, March 23rd 2011:
http://test.csswg.org/suites/css2.1/20110323/html4/toc.html

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Received on Tuesday, 28 August 2012 01:56:08 GMT

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