<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1640766
-->
<head>
  <title>Test for Bug 1640766</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1640766">Mozilla Bug 1640766</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript">

/** Test for Bug 1640766 **/

function waitForMessage(aMsg) {
  return new Promise((aResolve) => {
    window.addEventListener("message", function handler(e) {
      if (e.data != aMsg) {
        return;
      }

      info(`receive: ${e.data}`);
      window.removeEventListener("message", handler);
      aResolve(e.source);
    });
  });
}

async function testSuspend(aWindow) {
  let timerRan = false;
  let timer = aWindow.setTimeout(function() {
    timerRan = true;
  }, 0);

  return new Promise((aResolve) => {
    setTimeout(function() {
      ok(!timerRan, "timer should not run as the window is suspended");
      clearTimeout(timer);
      aResolve();
    }, 0);
  });
}

add_task(async function() {
  let w = window.open("iframe1_bug1640766.html");
  let inner = await waitForMessage("ready");

  var utils = SpecialPowers.getDOMWindowUtils(w);
  utils.enterModalState();

  await testSuspend(w);
  await testSuspend(inner);

  utils.leaveModalState();
  w.close();
});

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