1 Test that onloadingdone is fired after style recalculation.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
7 PASS window.getComputedStyle(testDiv, 0).width is "48px"
8 ready promise fulfilled
9 PASS window.getComputedStyle(testDiv, 0).width is "48px"
10 PASS successfullyParsed is true