<!DOCTYPE html>
<title>Test GetFencedFrameMode() on a nested nested iframe.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="resources/utils.js"></script>

<body>
<script>
promise_test(async () => {
  // This test has the following setup:
  // root -> (fencedframe) -> (first_iframe) -> (second_iframe)
  // (second_iframe) will attempt an _unfencedTop navigation, which will result
  // in GetFencedframeMode() being called. For this test to pass, it shouldn't
  // timeout.
  const fencedframe = await attachFencedFrameContext(
      {generator_api: 'fledge'});
  await fencedframe.execute(async () => {
    const first_iframe = attachIFrameContext();
    await first_iframe.execute(async () => {
      const second_iframe = attachIFrameContext();
      await second_iframe.execute(async () => {
        // This call will cause FrameTreeNode::GetFencedFrameMode() to be called
        // for second_iframe. If the browser process doesn't hang (and timeout
        // the test), then the test passes.
        window.open("https://www.google.com", "_unfencedTop");
      });
    });
  });
}, 'Trigger GetFencedFrameMode() in a nested nested iframe');
</script>
</body>