<!DOCTYPE html>
<title>SharedWorker: runtime errors are not parse errors</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>

promise_test(async t => {
  const worker = new SharedWorker('support/shared-worker-eval-syntax-error.js');
  worker.onerror = t.unreached_func(
      'onerror should not be invoked for eval() runtime error');
  const data = await new Promise(resolve => worker.port.onmessage = e => resolve(e.data));
  assert_equals(data, 'onerror-fired',
      'Error should have fired at the SharedWorkerGlobalScope');
}, 'eval() with syntax error fires at global scope but not at SharedWorker');

promise_test(async t => {
  const worker = new SharedWorker('support/shared-worker-json-parse-error.js');
  worker.onerror = t.unreached_func(
      'onerror should not be invoked for JSON.parse() runtime error');
  const data = await new Promise(resolve => worker.port.onmessage = e => resolve(e.data));
  assert_equals(data, 'onerror-fired',
      'Error should have fired at the SharedWorkerGlobalScope');
}, 'JSON.parse() error fires at global scope but not at SharedWorker');

promise_test(async () => {
  const worker = new SharedWorker('modules/resources/syntax-error.js');
  const event = await new Promise(resolve => {
    worker.onerror = e => { e.preventDefault(); resolve(e); };
  });
  assert_equals(event.constructor, Event,
      'Script parse error should dispatch Event, not ErrorEvent');
  assert_false(event instanceof ErrorEvent,
      'Script parse error should not be an ErrorEvent');
}, 'Script parse error dispatches plain Event at SharedWorker');

</script>