src/third_party/web_platform_tests/webmessaging/MessageEvent_properties.htm

<!DOCTYPE html>
<html>
<head>
<title> MessageEvent interface and properties </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="./support/ChildWindowPostMessage.htm"></iframe>
</div>

<script>


    var description = "Test Description: " +
            "Create an event that uses the MessageEvent interface, with the event type message, " +
            "which does not bubble, is not cancelable, and has no default action.";

    var t = async_test(description);

    var DATA = "foo";
    var TARGET = document.querySelector("iframe");
    var ExpectedResult = [true, true, false, false, false];
    var ActualResult = [];

    function PostMessageTest()
    {
        TARGET.contentWindow.postMessage(DATA, "*");
    }

    window.addEventListener("message", t.step_func(function(e)
    {
        e.preventDefault();

        ActualResult = [(e instanceof MessageEvent), (e.type == "message"), e.bubbles, e.cancelable, e.defaultPrevented];

        assert_array_equals(ActualResult, ExpectedResult, "ActualResult");

        t.done();

    }), false);
</script>
</body>
</html>