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<!doctype html>
<title>Cross-Origin-Opener-Policy: a navigated popup</title>
<!-- In particular this is different from coep-navigate-popup.https.html as this document initiates
the navigation (and uses same-origin-allow-popups and no COEP as without that it cannot be
observed). COOP should work identically, but implementations might have used the wrong
authority. -->
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src="/common/utils.js"></script> <!-- Use token() to allow running tests in parallel -->
async_test(t => {
const noCOOP = "/common/blank.html";
const popupName = token();
const popup =, popupName);
const channel = new BroadcastChannel(token());
// Close the popup once the test is complete.
// The browsing context is closed after the navigation hence use the broadcast channel
// to trigger the closure.
t.add_cleanup(() => {
popup.onload = t.step_func(() => {
assert_equals(, popupName);
assert_equals(new URL(popup.document.URL).pathname, noCOOP);
channel.onmessage = t.step_func_done(event => {
const payload =;
// The name should be empty, but we're checking the length rather than a
// string comparison to "" to keep the random token out of error messages.
assert_equals(, 0);
const coop = `resources/${}`;
popup.location = coop;
}, "Open a popup to a document without COOP, then navigate it to a document with");