popup-same-origin-non-initial-about-blank.https.html

<!doctype html>
<title>Cross-Origin-Opener-Policy: about:blank</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
async_test(t => {
  const popup = window.open("resources/coop-coep.py?coop=same-origin&coep=&navigate=about:blank");
  t.add_cleanup(() => popup.close());
  assert_equals(window, popup.opener);

  popup.onload = t.step_func(() => {
    assert_true(popup.location.href.endsWith("&navigate=about:blank"));
    // Use wait_for_callback as about:blank cannot message back.
    t.step_wait_func_done(() => popup.location.href === "about:blank");
  });
}, "Navigating a popup to about:blank");
</script>

chromium/third_party/blink/web_tests/external/wpt/html/cross-origin-opener-policy/popup-same-origin-non-initial-about-blank.https.html