| MutationRecord should be exposed on window but not constructible | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS window.MutationRecord is non-null. | |
| PASS typeof MutationRecord is "object" | |
| PASS new MutationRecord threw exception TypeError: MutationRecordConstructor is not a constructor (evaluating 'new MutationRecord'). | |
| PASS record instanceof MutationRecord is true | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |