fenced-frame/subframe-loading.https.html

<!DOCTYPE html>
<title>Test Subframe Loading Disabler</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<body>
<script>

promise_test(async () => {
  const container = document.body.appendChild(document.createElement("div"));

  // Create a helper iframe that triggers loading the new fenced frame
  // simultaneously when the parent container is removed.
  const helperFrame = container.appendChild(document.createElement("iframe"));

  helperFrame.contentWindow.onunload = function() {
    const fenced_frame = document.createElement("fencedframe");
    fenced_frame.src = "resources/dummy.https.html";
    container.appendChild(fenced_frame);
  };

  // If the fenced frame loads when it's not supposed to,
  // a DCHECK will catch that and cause the test to crash.
  document.body.removeChild(container);

}, "Fenced frames should not load if its parent has subframe loading disabled");

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