preload-dynamic-csp.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /preload/preload-dynamic-csp.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Makes sure that preload requests respect CSP directives that are added after the preload</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/preload/resources/preload_helper.js"></script>

<link id="preload" rel=preload href="resources/square.png" as=image>

<body>

<script>

    setup({single_test: true});

    const preload = document.querySelector("#preload");

    preload.addEventListener("load", async () => {

        const meta = document.createElement("meta");

        meta.httpEquiv = "Content-Security-Policy";

        meta.content = "img-src 'none'";

        document.head.appendChild(meta);

        const img = document.createElement("img");

        img.src = preload.href;

        document.body.appendChild(img);

        const load = new Promise(resolve => img.addEventListener("load", () => resolve('load')));

        const error = new Promise(resolve => img.addEventListener("error", () => resolve('error')));

        const result = await Promise.any([load, error]);

        assert_equals(result, "error");

        done();

});

</script>