<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
async_test(t => {
  assert_implements("HTMLPortalElement" in self);
  let portal = document.createElement('portal');
  portal.src = "resources/invalid.asis";
  document.body.appendChild(portal);
  t.add_cleanup(() => { document.body.removeChild(portal); });
  t.step_timeout(async () => {
    await promise_rejects_dom(t, 'InvalidStateError', portal.activate());
    t.done();
  }, 2000);
}, "A portal that is showing inline content for a network error cannot be activated");
</script>
</body>
