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Use of non-Latin graphemes in tests

From: Geoffrey Sneddon <gsneddon@opera.com>
Date: Sun, 01 Jul 2012 20:13:38 +0100
Message-ID: <4FF0A162.5050801@opera.com>
To: "public-css-testsuite@w3.org" <public-css-testsuite@w3.org>

Every few months I've got asked questions by colleagues as to what 
construes a pass for various bidi tests with a pass condition such as, 
"Test passes if characters are in the same order".

These questions normally resolve around whether two glyphs are 
realizations of the same grapheme (i.e., they are allographs). This has 
been especially problematic in cases where we've failed to render 
ligatures correctly, and hence the deviation from the reference image is 
even greater.

Attached are a couple of examples of the sort of result that causes 
issues (direction-unicode-bidi-017 and direction-unicode-bidi-026 
respectively). I believe both screenshots represent a pass, though 
Arabic is not a language I'm immensely familiar with. :)

I wonder how many of the bidi tests could be rewritten to be reftests, 
and have a (very) small set of manually inspected pages (I wonder if 
there's any way to get a better reference text in cases where a reftest 
isn't possible?) Any ideas? (I starred at the bidi algorithm for a bit, 
then realized I'd need to spend far more time than it's really worth now 
to get that all in my head again.)

Geoffrey Sneddon  Opera Software

(image/png attachment: t1.png)

(image/png attachment: t2.png)

Received on Sunday, 1 July 2012 19:14:17 UTC

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