From W3C Wiki
HTML Test Materials
HTML is kinda messy; a big pile of tests will be at least as valuable as a spec for interoperability.
see also test metadata in the WHATWG wiki.
Microsoft's cross-document messaging and DOM Storage tests published from Adrian Bateman on 2009-01-26 (email@example.com from January 2009) (at lists.w3.org)
/trunk/LayoutTests/fast/workers – WebKit (at trac.webkit.org)
html5_tables tests by James Graham 13 Feb 2009.
See Anne van Kesteren 14 March 2007 post to public-html for pointers to some more test materials; Graham replies with a pointer to some encoding tests.
In a 20 March 2007 post to public-html, Lachlan Hunt takes issue with a number of XHTML 2 features; a reply from Holst makes a number of compatibility claims. It would be useful to see these substantiated by test cases. mobile test results by Simon Pieters seems relevant.
- accesskey attribute tests
- HTML/TableAccessibility has some test materials to ascertain the state of support for table markup.
- Comparison of TABLE markup alternatives (based on CSS2, Section 17 example)
- Comparison of TABLE markup alternatives to orient user to author's tab-navigation reflow using tabindex for an embedded FORM (based on Techniques for WCAG 2.0 example):
- Tests of the "cite" attribute defined in HTML 4.01 for Q and BLOCKQUOTE
- Tests for Exposing Longdesc Targets
Tests to confirm these are claims about interoperability problems are most welcome:
- IE maps unknown start and end tags to empty elements; Other browsers assume unknown start tags are for non-empty elements with an inline content model
- attributes do not need enclosing quote marks; the XML /> syntax for empty elements is ignored even if attributes are enclosed in quote marks
- Gecko coerces unknown tags to upper case, Opera doesn't
- browser varations in treatment of XML namespaces with DOM-based work arounds using scripts
- IE will in some cases parse to a lattice not a tree
- behavior for multiple definitions of same ID value (only interesting in safari vs. firefox)
- The http://syntax.whattf.org/ schema project includes some above-parser-level test cases.
misc canvas test stuff to look at and summarize...
a test from http://simon.html5.org/test/html/ was cited in a 9 Jul 2007 msg to the WG
-- Internationalization tests by Ishida and the I18N Core WG
-- numbers/microsyntax tests by Geoffrey Sneddon
Content Type Sniffing Tests
Mozilla automated testing (DanC hopes to study it further)
hmm... sounds like WebKit has automated testing stuff that's at least as mature. pointers welcome.