| Checks that an exception is thrown when a dictionary value cannot be converted to a String | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS new MessageEvent('message', {origin: 'test'}).origin is "test" | |
| PASS new MessageEvent('message', {origin: 2}).origin is "2" | |
| PASS new MessageEvent('message', {origin: nonConvertibleToString}) threw exception Exception in toString(). | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |