Tests for WHATWG specifications are maintained in the web-platform-tests repository, along with those for many other web-platform features, including all those maintained by W3C (except, for historical reasons, CSS).
Tests are contributed by community members, including implementers. In general specification editors are not responsible for maintaining tests along with the specification, due to the excess burden of work this would create. Therefore different specifications are accompanied by testsuites of varying breadth and depth.
In order to contribute tests to the testsuite for a WHATWG specification, follow the instructions on Test the Web Forward.
Old lists of tests that maybe have not been ported to web platform tests?
People should prune this list...
- Test cases
- IE's tests
- (Some of?) WebKit's tests
- Some of Mozilla's mochitests
- Some of Mozilla's reftests
- Philip's canvas tests
- Hixie's ad-hoc tests
- Lachlan's tests
- gsnedders' number parsing tests
- zcorpan's tests
- Mathias’s tests
- hsivonen's video tests
- Document Object Model (DOM) Conformance Test Suites
- Window test suite