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<!DOCTYPE html>
<title>MessagePort should not work when created from a disconnected window</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<body>
<script>
"use strict";
SimpleTest.waitForExplicitFinish();
runTest();
async function runTest() {
let ifr = document.createElement('iframe');
await new Promise(resolve => {
ifr.onload = resolve;
ifr.src = 'support/empty.html';
document.body.appendChild(ifr);
});
let w = ifr.contentWindow;
let pre = new w.MessageChannel();
ok(!!pre, "We have a channel");
ifr.remove();
let post = new w.MessageChannel();
ok(!!post, "We have a channel");
// This should silently fail.
pre.port1.postMessage(42);
pre.port2.onmessage = () => {
ok(false, "No messages should be received!");
}
// This should silently fail.
post.port1.postMessage(42);
post.port2.onmessage = () => {
ok(false, "No messages should be received!");
}
// Let's use another MessagePort just to be sure no messages are received by
// port2.
let mc = new MessageChannel();
mc.port1.postMessage(42);
mc.port2.onmessage = () => {
ok(true, "Ready to complete the test");
SimpleTest.finish();
}
}
</script>
</body>
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