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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /signed-exchange/sxg-prefetch-resource-timing.tentative.html - WPT Dashboard Interop Dashboard
<!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>