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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/open-blank-host.js"></script>
<script>
function nextMessage(target) {
return new Promise((resolve, reject) => {
target.addEventListener('message', e => resolve(e), {once: true});
});
}
async function openPortalAndActivate(logic) {
let {port1, port2} = new MessageChannel();
const w = await openBlankPortalHost();
try {
const portal = w.document.createElement('portal');
portal.src = new URL('resources/eval-portal.html?logic=' + encodeURIComponent(logic), location.href);
w.document.body.appendChild(portal);
assert_equals((await nextMessage(portal)).data, 'ready');
const replyPromise = nextMessage(port2);
await portal.activate({data: {replyPort: port1}, transfer: [port1]});
port2.start();
return (await nextMessage(port2)).data;
} finally {
w.close();
}
}
promise_test(async () => {
assert_implements("HTMLPortalElement" in self);
let messageFromNewSrc = await openPortalAndActivate(
'let predecessor = event.adoptPredecessor();' +
'let readyPromise = new Promise((resolve, reject) => {' +
' predecessor.onmessage = e => resolve(e.data + " via new src");' +
'});' +
'predecessor.src = "/portals/resources/eval-portal.html";' +
'document.body.appendChild(predecessor);' +
'return readyPromise;');
assert_equals(messageFromNewSrc, 'ready via new src');
}, "can set portal src during portalactivate");
</script>
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