third_party/web_platform_tests/webmessaging/event.ports.sub.htm

<!DOCTYPE html>
<html>
<head>
<title> event.ports returns the MessagePort array sent with the message </title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id=log></div>

<div style="display:none">
    <iframe width="70%" onload="PostMessageTest()" src="{{location[scheme]}}://{{domains[www1]}}:{{location[port]}}/webmessaging/support/ChildWindowPostMessage.htm"></iframe>
</div>

<script>


    var description = "Test Description: event.ports returns the MessagePort array sent with the message.";

    var t = async_test(description);

    var DATA = {test: "e.source.postMessage(e.ports.toString(), '*', e.ports)"};
    var TARGET = document.querySelector("iframe");
    var ExpectedResult = "";

    function PostMessageTest()
    {
        test(function()
        {
            assert_own_property(window, "MessageChannel", "window");

            var channel = new MessageChannel();
            var ports = [channel.port1, channel.port2];
            ExpectedResult = ports.toString();
            TARGET.contentWindow.postMessage(DATA, "*", ports);

        }, "MessageChannel is supported.");
    }

    window.onmessage = t.step_func(function(e)
    {
        assert_equals(e.data, ExpectedResult, "e.data");
        assert_true(e.ports[0] instanceof MessagePort, e.ports[0] + " instanceof MessageChannel");
        assert_true(e.ports[1] instanceof MessagePort, e.ports[1] + " instanceof MessageChannel");
        t.done();
    });
</script>
</body>
</html>