location-ancestor-origins-new-object.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/browsers/history/the-location-interface/location-ancestor-origins-new-object.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>location.ancestorOrigins new object semantics</title>

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

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

<iframe></iframe>

<script>

test(() => {

  assert_implements(location.ancestorOrigins);

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

  const iframeLoc = iframe.contentWindow.location;

  assert_array_equals(iframeLoc.ancestorOrigins, [window.origin]);

  assert_equals(iframeLoc.ancestorOrigins, iframeLoc.ancestorOrigins, 'should return the same object before removing the iframe');

  const ancestorOriginsBeforeRemoval = iframeLoc.ancestorOrigins;

  iframe.remove();

  assert_array_equals(iframeLoc.ancestorOrigins, []);

  assert_not_equals(iframeLoc.ancestorOrigins, ancestorOriginsBeforeRemoval, 'should return a new object after removing the iframe');

  assert_equals(iframeLoc.ancestorOrigins, iframeLoc.ancestorOrigins, 'should return the same object on subsequent access');

});

</script>