LayoutTests/http/tests/security/sandbox-iframe-and-blob.https.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
</head>
<body>
    <iframe id="myFrame" sandbox="allow-scripts"></iframe>
    <script>
promise_test(async () => {
    myFrame.src = "resources/sandbox-iframe-and-blob-frame.html";
    const result = await new Promise((resolve, reject) => {
        window.onmessage = (event) => {
            resolve(event.data);
        };
        setTimeout(() => reject("iframe load timed out"), 5000);
    });
    assert_equals(result, 'loaded');
}, "Verify blob URLs are loaded with sandbox iframes");
    </script>
</body>
</html>