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chromium/third_party/blink/web_tests/external/wpt/loading/early-hints/resources/modulepreload-in-early-hints.html 

<!DOCTYPE html>
<meta charset=utf-8>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="early-hints-helpers.sub.js"></script>
<body>
<script>
async function fetchModuleScript(url) {
    return new Promise((resolve, reject) => {
        const el = document.createElement("script");
        el.src = url;
        el.type = "module";
        el.onload = resolve;
        el.onerror = _ => reject(new Error("Failed to fetch resource: " + url));
        document.body.appendChild(el);
    });
}

const params = new URLSearchParams(window.location.search);
const description = params.get("description");

promise_test(async (t) => {
    const resource_url = params.get("resource-url");
    const should_preload = params.get("should-preload") === "true";
    await fetchModuleScript(resource_url);
    assert_equals(isPreloadedByEarlyHints(resource_url), should_preload);
}, description);
</script>
</body>