<!DOCTYPE html>
<html>
<head>
<script src="../../../resources/js-test-pre.js"></script>
</head>
<body>
<script>
    description("This test checks if DataCloneError exception is thrown when postMessage's second parameter is the source port or the target port.");
    var dataCloneErrorWasThrown = false;
    var channel = new MessageChannel();
    channel.port1.start();
    try {
        channel.port1.postMessage("ports", [channel.port1]);
    } catch(ex) {
        if (ex.name == "DataCloneError")
            dataCloneErrorWasThrown = true;
    }
    shouldBeTrue("dataCloneErrorWasThrown")
</script>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>