<html>
<head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
</head>
<body>
<script>
promise_test(async (test) => {
    const registration = await navigator.serviceWorker.register("postMessage-client-worker.js", { scope : 'resources' });
    activeWorker = registration.active;
    if (activeWorker)
        return;

    activeWorker = registration.installing;
    await new Promise(resolve => {
        activeWorker.addEventListener('statechange', () => {
            if (activeWorker.state === "activated")
                resolve();
        });
    });
}, "Register service worker");

function with_iframe(url) {
    return new Promise(function(resolve) {
        var frame = document.createElement('iframe');
        frame.className = 'test-iframe';
        frame.src = url;
        frame.onload = function() { resolve(frame); };
        document.body.appendChild(frame);
    });
}

promise_test(async (test) => {
    const frame = await with_iframe('resources/controlled-frame-postMessage.html');
    let counter = 0;
    while (counter++ < 100 && frame.contentWindow.messageData == undefined)
       await new Promise(resolve => setTimeout(resolve, 50));
    assert_equals(frame.contentWindow.messageData, 0);
    frame.remove();
}, "Verify frame gets early messages if setting synchronously message event listener");

promise_test(async (test) => {
    const frame = await with_iframe('resources/controlled-frame-postMessage.html?repeatMessages');
    let counter = 0;
    while (counter++ < 100 && frame.contentWindow.messageData == undefined)
       await new Promise(resolve => setTimeout(resolve, 50));
    assert_not_equals(frame.contentWindow.messageData, 0);
    frame.remove();
}, "Verify frame does not get all messages if not setting event listener early");

promise_test(async (test) => {
    const frame = await with_iframe('resources/controlled-frame-postMessage.html?repeatMessages&listener');
    let counter = 0;
    while (counter++ < 100 && frame.contentWindow.messageData.length < 5)
       await new Promise(resolve => setTimeout(resolve, 50));

    assert_less_than(counter, 100);
    data = frame.contentWindow.messageData;
    for (let cptr = 1; cptr < data.length; cptr++)
        assert_true(data[cptr - 1] < data[cptr]);
    frame.remove();
}, "Verify frame does get messages in order");
</script>
</body>
</html>
