| PASS the event is an instance of AnimationEvent |
| PASS the event inherts from Event |
| PASS Missing type argument |
| PASS type argument is string |
| PASS type argument is null |
| PASS event type set to undefined |
| PASS animationName has default value of empty string |
| PASS elapsedTime has default value of 0.0 |
| PASS animationName is readonly |
| PASS elapsedTime is readonly |
| PASS animationEventInit argument is null |
| PASS animationEventInit argument is undefined |
| PASS animationEventInit argument is empty dictionary |
| FAIL AnimationEvent.pseudoElement initialized from the dictionary assert_equals: expected (string) "::testPseudo" but got (undefined) undefined |
| PASS animationName set to 'sample' |
| PASS elapsedTime set to 0.5 |
| PASS AnimationEventInit properties set value |
