<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);
}

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" }, "*");
  });
};

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