location-ancestor-origins-referrerpolicy-snapshot.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/history/the-location-interface/location-ancestor-origins-referrerpolicy-snapshot.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>location.ancestorOrigins snapshot timing of referrerpolicy</title>

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

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

<body>

<script>

promise_test(async () => {

  assert_implements(location.ancestorOrigins);

  const iframe = document.createElement('iframe');

  iframe.src = '/common/blank.html?pipe=trickle(d1)';

  iframe.referrerPolicy = 'no-referrer';

  const loaded = new Promise(resolve => iframe.onload = resolve);

  document.body.append(iframe);

  // initial about:blank should see 'no-referrer' results

  assert_array_equals(Array.from(iframe.contentWindow.location.ancestorOrigins), ['null']);

  iframe.referrerPolicy = '';

  await loaded;

  // The referrerpolicy attribute get snapshotted at step 16 of "beginning navigation"

  // https://html.spec.whatwg.org/#beginning-navigation and result should therefore,

  // still be ["null"], here.

  assert_array_equals(Array.from(iframe.contentWindow.location.ancestorOrigins), ["null"]);

});

promise_test(async () => {

  assert_implements(location.ancestorOrigins);

  const iframe = document.createElement('iframe');

  iframe.referrerPolicy = 'no-referrer';

  const loaded = new Promise(resolve => iframe.onload = resolve);

  document.body.append(iframe);

  // initial about:blank should see 'no-referrer' results

  assert_array_equals(Array.from(iframe.contentWindow.location.ancestorOrigins), ['null']);

  iframe.referrerPolicy = '';

  await loaded;

  await new Promise(resolve => {

    iframe.onload = resolve;

    iframe.src = '/common/blank.html?pipe=trickle(d1)';

});

  assert_array_equals(Array.from(iframe.contentWindow.location.ancestorOrigins), [window.origin]);

});

</script>