prefetch-events.html

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This test has a WPT meta file that expects 4 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /preload/prefetch-events.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Ensures that prefetch respects HTTP cache semantics</title>

<meta name="timeout" content="long">

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

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

<script src="/common/utils.js"></script>

<script src="resources/prefetch-helper.js"></script>

<script src="/common/get-host-info.sub.js"></script>

<body>

<script>

const {REMOTE_ORIGIN} = get_host_info();

async function prefetch(link, uid, t) {

    link.rel = "prefetch";

    document.head.appendChild(link);

    const event = new Promise(resolve => {

        link.addEventListener("error", () => resolve("error"));

        link.addEventListener("load", () => resolve("load"));

        t.step_timeout(() => resolve("timeout"), 1000);

});

    return await event;

promise_test(async t => {

    const uid = token();

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

    link.href = `/preload/resources/prefetch-info.py?key=${uid}`;

    const event = await prefetch(link, uid, t);

    assert_equals(event, "load");

}, "Prefetch should fire the load event");

promise_test(async t => {

    const uid = token();

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

    link.href = `${REMOTE_ORIGIN}/preload/resources/prefetch-info.py?key=${uid}`;

    const event = await prefetch(link, uid, t);

    assert_equals(event, "load");

}, "Cross-origin prefetch should fire the load event");

promise_test(async t => {

    const uid = token();

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

    link.href = `/preload/resources/prefetch-info.py?key=${uid}&status=404`;

    const event = await prefetch(link, uid, t);

    assert_equals(event, "load");

}, "Prefetch should fire the load event for 404");

promise_test(async t => {

    const uid = token();

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

    link.href = `${REMOTE_ORIGIN}/preload/resources/prefetch-info.py?key=${uid}&status=404`;

    const event = await prefetch(link, uid, t);

    assert_equals(event, "load");

}, "Prefetch should fire the load event for 404 (cross-origin)");

promise_test(async t => {

    const uid = token();

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

    link.href = `/preload/resources/prefetch-info.py?key=${uid}&status=500`;

    const event = await prefetch(link, uid, t);

    assert_equals(event, "load");

}, "Prefetch should fire the load event for 500");

promise_test(async t => {

    const uid = token();

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

    link.href = `${REMOTE_ORIGIN}/preload/resources/prefetch-info.py?key=${uid}&status=500`;

    const event = await prefetch(link, uid, t);

    assert_equals(event, "load");

}, "Cross-origin prefetch should fire the load event for 500");

promise_test(async t => {

    const uid = token();

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

    link.crossOrigin = "anonymous";

    link.href = `${REMOTE_ORIGIN}/preload/resources/prefetch-info.py?key=${uid}&cors=false`;

    const event = await prefetch(link, uid, t);

    assert_equals(event, "error");

}, "Prefetch should fire the error event for network errors");

promise_test(async t => {

    const uid = token();

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

    link.crossOrigin = "anonymous";

    const event = await prefetch(link, uid, t);

    assert_equals(event, "timeout");

}, "Prefetch should do nothing with an empty href");

promise_test(async t => {

    const uid = token();

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

    link.href = "https://example.com\u0000mozilla.org";

    link.crossOrigin = "anonymous";

    const event = await prefetch(link, uid, t);

    assert_equals(event, "timeout");

}, "Prefetch should do nothing with an invalid href");

</script>

</body>