<!DOCTYPE html>
<body>
<script>
if (window.testRunner) {
    testRunner.waitUntilDone();
    testRunner.dumpAsText();
}

let count = 0;
onmessage = (event) => {
    ++count;
    if (event.data !== "null") {
        document.body.innerHTML = "FAIL, got " + event.data + " with count " + count;
        if (window.testRunner)
            testRunner.notifyDone();
        window.clearTimeout(timer);
        count = 3;
        return;
    }
    if (count === 2) {
        document.body.innerHTML = "PASS";
        if (window.testRunner)
            testRunner.notifyDone();
        window.clearTimeout(timer);
    }
};

const timer = setTimeout(() => {
    document.body.innerHTML = "TIMEOUT";
    if (window.testRunner)
        testRunner.notifyDone();
}, 10000);
</script>
<iframe src="data:text/html,<script>console.log('data URL frame loaded'); const blob = new Blob(['<'+ 'script>console.log(\'blob popup loaded\' + location.origin); onload = () => window.opener.postMessage(location.origin, \'*\'); console.log(\'blob popup message posted\'); onmessage = () => window.opener.postMessage(location.origin, \'*\'); <' + '/script>'], {type: 'text/html'}); const blobURL = URL.createObjectURL(blob); const popup = window.open(blobURL); onmessage = (event) => { popup.postMessage('check', '*'); parent.postMessage(event.data, '*'); URL.revokeObjectURL(blobURL); onmessage = (event) => { parent.postMessage(event.data, '*'); popup.close(); }; }; console.log('blob popup opened'); </script>"></iframe>
</body>