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<!DOCTYPE html>
<!--
Tests for cross-origin iframes due to sandbox flags is deferred properly.

This file cannot be upstreamed to WPT until:
* The specification describes the loading of cross-origin iframes. The test
  expects that they are not loaded during prerendering.
-->
<title>Load a prerendered iframe with sandbox attributes</title>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="/common/utils.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<body>
<script>

setup(() => assertSpeculationRulesIsSupported());

promise_test(async t => {
  const uid = token();
  const bc = new PrerenderChannel('test-channel', uid);
  const messageQueue = new BroadcastMessageQueue(bc);
  t.add_cleanup(_ => bc.close());

  const url = `resources/sandbox-iframe.html?uid=${uid}`;
  window.open(url, '_blank', 'noopener');

  const result = await messageQueue.nextMessage();
  const expected = [
    {
      event: 'started waiting iframe loaded',
      prerendering: true
    },
    {
      event: 'prerendering change',
      prerendering: false
    },
    {
      event: 'finished waiting iframe loaded',
      prerendering: false
    },
  ];
  assert_equals(result.length, expected.length);
  for (let i = 0; i < result.length; i++) {
    assert_equals(result[i].event, expected[i].event, `event[${i}]`);
    assert_equals(result[i].prerendering, expected[i].prerendering,
       `prerendering[${i}]`);
  }

  // Send a close signal to PrerenderEventCollector on the prerendered page.
  new PrerenderChannel('close', uid).postMessage('');
}, `same-origin sandbox iframes should not load until activation`);

</script>
</body>