| PASS SpeechSynthesisEvent with no arguments throws TypeError | |
| PASS SpeechSynthesisEvent with no eventInitDict throws TypeError | |
| PASS SpeechSynthesisEvent with empty eventInitDict throws TypeError (requires | |
| utterance) | |
| PASS SpeechSynthesisEvent with eventInitDict not having utterance throws | |
| TypeError | |
| FAIL SpeechSynthesisEvent with eventInitDict having an utterance Illegal constructor | |
| FAIL SpeechSynthesisEvent with custom eventInitDict Illegal constructor | |