| Tests a flag to make background shorthand property not override background-size when it's already set. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS e.style.background is "url(\"dummy://test.png\") center center / cover no-repeat border-box border-box red" | |
| PASS e.style.backgroundSize is "cover" | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |