<!doctype html>
<html>
<head>
<script type="application/javascript">

  function waitForMessage() {
    return new Promise(function(resolve) {
      window.addEventListener('message', function(evt) {
        resolve(evt.data);
      }, {once: true});
    });
  }

  // Set up the objects for cloning.
  function setup() {
    window.testObject = { myNumber: 42,
                          myString: "hello",
                          myImageData: new ImageData(10, 10) };
  }

  // Called by the chrome parent window.
  function tryToClone(obj, shouldSucceed, message) {
    var success = false;
    try { window.postMessage(obj, '*'); success = true; }
    catch (e) { message = message + ' (threw: ' + e.message + ')'; }
    is(success, shouldSucceed, message);
    return (success && shouldSucceed) ? waitForMessage() : Promise.resolve();
  }

</script>
</head>
<body onload="setup()">
<input id="fileinput" type="file"></input>
</body>
</html>
