Maximum (viewport) height for testcases; vertical scrollbar checked in automated checking of reftests

Hello,

1-
What is or what would be the maximum document height of testcases? 400px
? 500px ? Is there a *preferred* or recommended maximum document height
of testcases?

2-
When testcases are compared with their correspondent reftests, do the
software comparing screenshots actually verify presence of vertical
scrollbar of the viewport? or actually take into account/consider
presence of vertical scrollbar of the viewport as something which could
make a testcase declared as failed.

For example, my browser viewport height is usually around 420px
(window.innerHeight), so if a testcase requires a document height
(offsetHeight) of more than 420px, then I will get a vertical scrollbar.
I can increase such height by removing some toolbars.



There is no current requirement with regards to maximum or preferred or
recommended document height for testcases.

I have read
CSS Test Review Checklist
http://wiki.csswg.org/test/css2.1/review-checklist

and

CSS2.1 Conformance Test Suite: Common Assumptions and Uncommon Assumptions
http://test.csswg.org/suites/css2.1/20110323/


I want also to point out that this issue can also affect the usage of
test harness.

regards, Gérard
-- 
Contributions to the CSS 2.1 test suite:
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CSS 2.1 Test suite RC6, March 23rd 2011:
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Received on Tuesday, 6 December 2011 04:21:17 UTC