<title> MessageChannel: port.onmessage enables message queue </title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id=log></div>

var TestResult = false;

var description = "The first time a MessagePort object's onmessage IDL attribute is set, the port's "

+ "port message queue must be enabled, as if the start() method had been called.";

var t = async_test("Test Description: " + description);

var channel = new MessageChannel();

channel.port2.onmessage = TestMessageEvent;

channel.port1.postMessage("ping");

setTimeout(t.step_func(VerifyResult), 100);

function TestMessageEvent(evt)

{

TestResult = true;

}

function VerifyResult()

{

assert_true(TestResult, "Port message queue is enabled?");

t.done();

}