39 lines
1.5 KiB
HTML
39 lines
1.5 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<title>Makes sure that preloaded resources reduce connection time to zero</title>
|
|
<meta name="timeout" content="long">
|
|
<meta name="pac" content="/common/proxy-all.sub.pac">
|
|
<script src="/common/utils.js"></script>
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
|
|
<body>
|
|
<script>
|
|
const FAKE_PORT = 30303;
|
|
promise_test(async t => {
|
|
const fake_remote_origin = `http://${token()}.wpt:${FAKE_PORT}`;
|
|
const link = document.createElement('link');
|
|
link.rel = "preconnect";
|
|
link.href = fake_remote_origin;
|
|
document.head.appendChild(link);
|
|
await new Promise(r => t.step_timeout(r, 1000));
|
|
const url = `${fake_remote_origin}/images/smiley.png`;
|
|
const entryPromise = new Promise(resolve => {
|
|
new PerformanceObserver(list => {
|
|
const entries = list.getEntriesByName(url);
|
|
if (entries.length)
|
|
resolve(entries[0]);
|
|
}).observe({type: "resource"});
|
|
});
|
|
|
|
const img = document.createElement('img');
|
|
img.src = url;
|
|
document.body.appendChild(img);
|
|
const entry = await entryPromise;
|
|
assert_equals(entry.domainLookupStart, entry.domainLookupEnd);
|
|
assert_equals(entry.domainLookupStart, entry.connectStart);
|
|
assert_equals(entry.domainLookupStart, entry.connectEnd);
|
|
}, "Test that preconnect reduces connection time to zero");
|
|
</script>
|
|
</body>
|
|
</html>
|