ladybird/Tests/LibWeb/Text/input/FileAPI/Blob-partitioning.html

<script src="../include.js"></script>
<script>
    asyncTest(async (done) => {
        try {
            const httpServer = httpTestServer();
            const url = await httpServer.createEcho("GET", "/blob-partitioned-fetched", {
                status: 200,
                headers: {
                    "Access-Control-Allow-Origin": "*",
                },
                body: `
                <script>
                    const blob = new Blob(["Hello, world!"], { type: "text/plain" });
                    const blobURL = URL.createObjectURL(blob);
                    window.parent.postMessage(blobURL, "*");
                <\/script>
                `
            });

            const options = {
                method: 'GET',
                mode: 'no-cors'
            };
            window.addEventListener("message", async (event) => {
                const blobURL = event.data;
                try {
                    const response = await fetch(blobURL, options);
                } catch (e) {
                    println(e);
                }
                done();
            });

            const iframe = document.getElementById("testIframe");
            iframe.src = url;

        } catch (err) {
            console.log("FAIL - " + err);
        }
    });
</script>
<iframe id="testIframe" src="about:blank"></iframe>