1 CONSOLE WARNING: 'DOMImplementation.createCSSStyleSheet()' is deprecated.
2 Test that CSS rules don't lose custom properties on GC when only reachable through child rules.
4 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
7 FAIL rule.parentRule.foo should be bar. Threw exception TypeError: Cannot read property 'foo' of null
8 PASS successfullyParsed is true