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Test Info:

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
function childReady() {
return new Promise((resolve) => {
window.onmessage = resolve;
const handlers = ['beforeunload', 'pagehide', 'unload'];
for (let handler of handlers) {
promise_test(async (test) => {
let popup;
// Open a popup that has a portal, wait for both to be loaded.
await test_driver.bless('Open a popup', () => {
popup = open(`resources/portal-activate-in-handler.html?${handler}`,
await childReady();
// We need the exception type below to ensure the activate() call
// throws but the popup global may be gone by then so stash it here.
const exception_type = popup.DOMException;
// Navigate the popup away.
const cur_path = popup.location.pathname;
popup.location = 'resources/blank-host.html';
// We need to wait until the handler is called but because of the
// nature of these handlers, we can't reliably communicate with the
// popup while they're running so we use a promise established
// earlier to wait until a time we know the portal has been activated
// and the returned promise stored on this global.
await window.handler_called_promise;
assert_not_equals(typeof(window.portal_promise), 'undefined',
'Portal.activate() must be called');
// The popup should have called activate from the handler, and placed
// the promise returned from that call into this window in the
// |portal_promise| variable. We expect that this call should reject,
// however, if it does activate, it's timing dependent whether the
// handler will be run to completion so we may never fulfil the
// promise. In that case timeout and fail the test.
test.step_timeout(() => {
assert_unreached('Activation didn\'t fulfil.');
}, 3000);
await promise_rejects_dom(test,
"Portal activation must fail.");
}, `cannot activate portal from ${handler}`);