Not just their behavior, but also reading them out of the CSSOM.
Also test calc() and env()
Actually, not calc() and env() because https://github.com/w3c/csswg-drafts/issues/6631 isn't resolved yet.
And, reading them out of the CSSOM should be enough. This is a parsing test.
Created attachment 439242 [details]
This patch modifies the imported WPT tests. Please ensure that any changes on the tests (not coming from a WPT import) are exported to WPT. Please see https://trac.webkit.org/wiki/WPTExportProcess
Committed r283076 (242134@main): <https://commits.webkit.org/242134@main>