gecko-dev/dom/broadcastchannel/tests/test_ordering.html

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<!DOCTYPE HTML>
<html>
<head>
<title>Test for BroadcastChannel.postMessage invalid State</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<div id="content"></div>
<script type="application/javascript">
let c1 = new BroadcastChannel("order");
let c2 = new BroadcastChannel("order");
let c3 = new BroadcastChannel("order");
let events = [];
let doneCount = 0;
function whichBC(bc) {
if (bc == c1) return "c1";
if (bc == c2) return "c2";
if (bc == c3) return "c3";
return "What?!?";
}
function handler(e) {
events.push(e);
if (e.data == "done") {
doneCount++;
if (doneCount == 2) {
is(events.length, 6, "Correct length");
is(whichBC(events[0].target), "c2", "target for event 0");
is(events[0].data, "from c1");
is(whichBC(events[1].target), "c3", "target for event 1");
is(events[1].data, "from c1");
is(whichBC(events[2].target), "c1", "target for event 2");
is(events[2].data, "from c3");
is(whichBC(events[3].target), "c2", "target for event 3");
is(events[3].data, "from c3");
is(whichBC(events[4].target), "c1", "target for event 4");
is(events[4].data, "done");
is(whichBC(events[5].target), "c3", "target for event 5");
is(events[5].data, "done");
SimpleTest.finish();
}
}
}
c1.onmessage = handler;
c2.onmessage = handler;
c3.onmessage = handler;
c1.postMessage("from c1");
c3.postMessage("from c3");
c2.postMessage("done");
SimpleTest.waitForExplicitFinish();
</script>
</body>
</html>