gecko-dev/testing/web-platform/tests/webmessaging/Channel_postMessage_target_...

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HTML

<!DOCTYPE html>
<html>
<head>
<title> postMessage(): target port and source port </title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id=log></div>
<script>
var TARGET = null;
var SOURCE = null;
var description = "The postMessage() method - Let target port be the port with which source "
+ "port is entangled, if any.";
var t = async_test("Test Description: " + description);
var channel = new MessageChannel();
SOURCE = channel.port1;
TARGET = channel.port2;
TARGET.start();
TARGET.addEventListener("message", t.step_func(TestMessageEvent), true);
SOURCE.postMessage("ping");
function TestMessageEvent(evt)
{
assert_equals(evt.target, TARGET);
assert_not_equals(evt.target, SOURCE);
t.done();
}
</script>
</body>
</html>