cross-origin-iframe-prerender.https.html

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This WPT test may be referenced by the following Test IDs:
- /speculation-rules/prerender/cross-origin-iframe-prerender.https.html?target_hint=_blank - WPT Dashboard Interop Dashboard
- /speculation-rules/prerender/cross-origin-iframe-prerender.https.html?target_hint=_self - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<!--

Tests for cross-origin iframes `document.prerendering` state with

`Supports-Loading-Mode: prerender-cross-origin-frames` header.

-->

<title>Load a cross-origin document in a prerendered iframe</title>

<meta name="variant" content="?target_hint=_self">

<meta name="variant" content="?target_hint=_blank">

<meta name="timeout" content="long">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/utils.js"></script>

<script src="../resources/utils.js"></script>

<script src="resources/utils.js"></script>

<body>

<script>

setup(() => assertSpeculationRulesIsSupported());

promise_test(async t => {

  const uid = token();

  const bc = new PrerenderChannel('test-channel', uid);

  const gotMessage = new Promise(resolve => {

    bc.addEventListener('message', e => {

      resolve(e.data);

    }, {

      once: true

});

});

  const url = `resources/cross-origin-iframe-prerender.html?uid=${uid}&target_hint=${getTargetHint()}`;

  window.open(url, '_blank', 'noopener');

  const result = await gotMessage;

  assert_equals(result, 'iframe prerender finished correctly.');

  bc.close();

  // Send a close signal to PrerenderEventCollector on the prerendered page.

  new PrerenderChannel('close', uid).postMessage('');

}, `cross-origin iframes should be prerendered with prerender-cross-origin-frame header.`);

</script>