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<!DOCTYPE html>
<html>
<head>
<title>Navigation Timing Transfert Size of Prefetched Page</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
</head>
<body>
<script>
function add_iframe(url) {
return new Promise(resolve => {
const frame = document.createElement('iframe');
frame.src = url;
frame.addEventListener('load', () => {
resolve(frame);
}, { once: true });
document.body.appendChild(frame);
});
};
promise_test(async t => {
// Add an iframe
let iframe_url = 'resources/iframe-prefetch-transfer-size.html';
frame = await add_iframe(iframe_url)
// Prefetch a url as link element.
await frame.contentWindow.addLink();
// navigate to the prefetched url.
await new Promise(resolve => {
frame.addEventListener('load', () => {
resolve();
}, { once: true });
frame.contentWindow.navigateToPrefetchedUrl();
});
// Verify navigation timing transfer size is 0.;
let transferSize =
frame.contentWindow.performance.getEntriesByType('navigation')[0].transferSize;
assert_equals(transferSize, 0);
}, "Navigation timing transfer size for a prefetched navigation should be 0.");
</script>
</body>
</html>
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