third_party/WebKit/LayoutTests/fast/workers/simultaneous-errors.html

   1 <!doctype html>
   2 <script src="../../resources/js-test.js"></script>
   3 <script>
   4 window.jsTestIsAsync = true;
   5
   6 var workers = 4;
   7 var errorsInWorker = 0;
   8 var promises = [];
   9 for (i = 0; i < workers; ++i) {
  10   var worker = new Worker('resources/throw-on-message-worker.js');
  11   promises.push(new Promise(function(resolve, reject) {
  12       worker.onmessage = function(event) {
  13           if (event.data === 'second')
  14               resolve();
  15           else if (event.data === 'error')
  16               ++errorsInWorker;
  17       }
  18   }));
  19   worker.postMessage('first');
  20   worker.postMessage('second');
  21 }
  22
  23 Promise.all(promises).then(function() {
  24     if (errorsInWorker === workers)
  25         testPassed('all worker errors were reported.');
  26     else
  27         testFailed('only ' + errorsInWorker + ' errors reported in ' + workers + ' workers');
  28     finishJSTest();
  29 });
  30 </script>