| Sibling invalidation with :hover and ::first-letter | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS getComputedStyle(target).backgroundColor is transparent | |
| PASS window.eventSender is defined. | |
| PASS internals.updateStyleAndReturnAffectedElementCount() is 4 | |
| PASS getComputedStyle(target).backgroundColor is green | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |
| This text, and the orange square, should have a green background when the orange square is hovered. |