third_party/web_platform_tests/webmessaging/postMessage_objects.sub.htm

<!DOCTYPE html>
<html>
<head>
<title> postMessage with nested objects </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[www]}}:{{location[port]}}/webmessaging/support/ChildWindowPostMessage.htm"></iframe>
</div>

<script>


    var description = "Test Description: Messages can be structured objects, e.g., nested objects.";

    var t = async_test(description);

    var DATA = {foo: {bar: "wow"}};
    var TYPE = "object";
    var TARGET = document.querySelector("iframe");

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

    window.onmessage = t.step_func(function(e)
    {
        assert_equals(typeof(e.data), TYPE);
        assert_equals(typeof(e.data.foo), TYPE);
        assert_object_equals(e.data, DATA);
        t.done();
    });
</script>
</body>
</html>