This tests that invalid syntax triggers 'worker.onerror'. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". Page-level worker.onerror handler triggered: PASS errorEvent.message is "Uncaught SyntaxError: Unexpected token }" PASS stripURL(errorEvent.filename) is "[blob: URL]" PASS errorEvent.lineno is 2 PASS errorEvent.colno is 9 PASS errorEvent.error is null PASS successfullyParsed is true TEST COMPLETE