1 Use descendant invalidation set for :empty pseudo class - sibling invalidation.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS getComputedStyle(emptySibling, '').backgroundColor is green
7 PASS internals.updateStyleAndReturnAffectedElementCount() is 7
8 PASS getComputedStyle(emptySibling, '').backgroundColor is transparent
9 PASS getComputedStyle(notEmptySibling, '').backgroundColor is transparent
10 PASS internals.updateStyleAndReturnAffectedElementCount() is 6
11 PASS getComputedStyle(notEmptySibling, '').backgroundColor is green
12 PASS successfullyParsed is true