embedded-opener.html

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This WPT test may be referenced by the following Test IDs:
- /html/browsers/windows/embedded-opener.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>opener and embedded documents; using window.open()</title>

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

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

<div id=log></div>

<iframe name=matchesastring></iframe>

<script>

async_test(t => {

  const frame = document.querySelector("iframe");

  frame.onload = t.step_func(() => {

    // Firefox and Chrome/Safari load differently

    if (frame.contentWindow.location.href === "about:blank") {

      return;

    // Test bits

    assert_equals(frame.contentWindow.opener, window, "opener before setting it to null");

    const openerDesc = Object.getOwnPropertyDescriptor(frame.contentWindow, "opener"),

          openerGet = openerDesc.get;

    assert_equals(openerGet(), window, "opener before setting it to null via directly invoking the getter");

    frame.contentWindow.opener = null;

    frame.contentWindow.opener = "immaterial";

    assert_equals(openerGet(), null, "opener after setting it to null via directly invoking the getter");

    assert_equals(frame.contentWindow.opener, "immaterial");

    t.done();

});

  window.open("/common/blank.html", "matchesastring");

});

</script>