sxg-double-prefetch.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /signed-exchange/sxg-double-prefetch.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Prefetching double SignedHTTPExchange files must not crash</title>

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

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

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

<script src="./resources/sxg-util.js"></script>

<body>

<script>

function addPrefetch(url) {

  let link = document.createElement('link');

  link.rel = 'prefetch';

  link.href = url;

  document.body.appendChild(link);

promise_test(async (t) => {

  const sxg1_url =

      get_host_info().HTTPS_ORIGIN + '/signed-exchange/resources/sxg/sxg-location.sxg?1';

  const sxg2_url =

      get_host_info().HTTPS_ORIGIN + '/signed-exchange/resources/sxg/sxg-location.sxg?2';

  addPrefetch(sxg1_url);

  addPrefetch(sxg2_url);

  await new Promise(resolve => {

    setInterval(() => {

      const entries = performance.getEntriesByType("resource");

      let hit_count = 0;

      for (let i = 0; i < entries.length; ++i) {

        const entry = entries[i];

        if (entry.name == sxg1_url || entry.name == sxg2_url) {

          if (++hit_count == 2)

            resolve();

    }, 100);

});

}, 'Prefetching double SignedHTTPExchange files must not crash');

</script>

</body>