<html>
<head>
  <title>Tracker</title>
  <script type="text/javascript" src="https://example.com/browser/toolkit/components/antitracking/test/browser/storageAccessAPIHelpers.js"></script>
</head>
<body>
<h1>Tracker</h1>
<script>

function info(msg) {
  parent.postMessage({ type: "info", msg }, "*");
}

function ok(what, msg) {
  parent.postMessage({ type: "ok", what: !!what, msg }, "*");
}

function is(a, b, msg) {
  ok(a === b, msg);
}

function workerCode() {
  onmessage = e => {
    try {
      indexedDB.open("test", "1");
      postMessage(true);
    } catch (e) {
      postMessage(false);
    }
  };
}

var worker;
function createWorker() {
  let blob = new Blob([workerCode.toString() + "; workerCode();"]);
  let blobURL = URL.createObjectURL(blob);
  info("Blob created");

  worker = new Worker(blobURL);
  info("Worker created");
}

onmessage = function(e) {
  let runnableStr = `(() => {return (${e.data.callback});})();`;
  let runnable = eval(runnableStr); // eslint-disable-line no-eval
  runnable.call(this, e.data.arg || /* Phase */ 3).then(_ => {
    parent.postMessage({ type: "finish" }, "*");
  });
};

createWorker();

</script>
</body>
</html>
