<!DOCTYPE html>
<title>Resource Timing for prefetched SignedHTTPExchange</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);
}

async function waitForPerformanceEntries(url) {
  let entries = performance.getEntriesByName(url);
  if (entries.length > 0) {
    return entries;
  }
  return new Promise((resolve) => {
    new PerformanceObserver((list) => {
      const entries = list.getEntriesByName(url);
      if (entries.length > 0) {
        resolve(entries);
      }
    }).observe({ entryTypes: ['resource'] });
  });
}

promise_test(async (t) => {
  const url = get_host_info().HTTPS_ORIGIN + '/signed-exchange/resources/sxg/sxg-location.sxg';
  addPrefetch(url);
  return waitForPerformanceEntries(url).then((entries) => {
    assert_equals(entries.length, 1, "Should have only one resource timing entry");
    const e = entries[0];
    assert_greater_than(e.duration, 0, "duration should be greater than 0");
    assert_greater_than(e.fetchStart, 0, "fetchStart should be greater than 0");
    assert_greater_than(e.responseEnd, e.fetchStart,
                        "responseEnd should be greater than fetchStart");
  });
}, 'Resource Timing for prefetched SignedHTTPExchange');
</script>
</body>
