third_party/WebKit/LayoutTests/fast/events/message-port-start-and-close-different-microtask.html

   1 <body>
   2 <p>Test whether opening and closing a messageport in different microtasks correctly receives an in-flight message.</p>
   3 <p>Should be a START message, followed by a HELLO message then DONE.</p>
   4 <pre id=log></pre>
   5 <script>
   6 function log(message)
   7 {
   8     document.getElementById("log").innerHTML += message + "<br>";
   9 }
  10
  11 if (window.testRunner) {
  12     testRunner.dumpAsText();
  13     testRunner.waitUntilDone();
  14 }
  15
  16 log("START");
  17
  18 var channel = new MessageChannel;
  19 channel.port2.postMessage("HELLO");
  20 openThenPostClose();
  21 done();
  22
  23 function openThenPostClose() {
  24     setTimeout(function() {
  25         channel.port1.onmessage = function(evt) {
  26             log("PASS. Got Message: " +  evt.data + " before close");
  27         }
  28         setTimeout(function() {
  29             channel.port1.close();
  30         }, 0);
  31     }, 0);
  32 }
  33
  34 function done() {
  35     // Wait a short period of time to ensure no messages come in from previous tests.
  36     setTimeout(function() {
  37         log("DONE");
  38         if (window.testRunner)
  39             testRunner.notifyDone();
  40     }, 100);
  41 }
  42
  43 </script>
  44 </body>