<!DOCTYPE html>
<html>
<body>
<script src="../../../resources/js-test-pre.js"></script>
<script>
description("Tests that MessageEvent.data returns the value it was initialized to.");

function testData(data)
{
    expectedData = data;

    debug("Using constructor");
    messageEvent = new MessageEvent("foo", { data: expectedData });
    shouldBeTrue("messageEvent.data === expectedData");
    shouldBeTrue("messageEvent.data === messageEvent.data");

    debug("Using deprecated initMessageEvent()");
    messageEvent = document.createEvent("messageevent");
    messageEvent.initMessageEvent("foo", false, false, expectedData);
    shouldBeTrue("messageEvent.data === expectedData");
    shouldBeTrue("messageEvent.data === messageEvent.data");
}

debug("* JS Object");
testData({ value: 1 });

debug("");
debug("* String");
testData("testString");

debug("");
debug("* Blob");
const blob = new Blob([JSON.stringify({ hello: "world" }, null, 2)], {type : 'application/json'});
testData(blob);

debug("");
debug("* ArrayBuffer");
var buffer = new ArrayBuffer(8);
testData(buffer);

debug("");
</script>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>