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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="/common/utils.js"></script>
<script src="../resources/utils.js"></script>
<script src="resources/utils.sub.js"></script>
<meta name="variant" content="?default">
<meta name="variant" content="?bypass_cache=true">
<meta name="variant" content="?prefetch=true">
<meta name="variant" content="?prefetch=true&bypass_cache=true">
<script>
setup(() => assertSpeculationRulesIsSupported());
const searchParams = new URLSearchParams(location.search);
const prefetchEnabled = searchParams.has('prefetch');
const bypassCache = searchParams.has('bypass_cache');
// Header size: https://w3c.github.io/resource-timing/#dom-performanceresourcetiming-transfersize
const headerSize = 300;
promise_test(async t => {
const agent = await spawnWindow(t);
// Some meaningless query param to avoid cached response.
const prefetchUrl =
bypassCache ? agent.getExecutorURL({ a: "b" }) : agent.getExecutorURL();
if (prefetchEnabled)
await agent.forceSinglePrefetch(prefetchUrl);
await agent.navigate(prefetchUrl);
if (prefetchEnabled)
assert_prefetched(await agent.getRequestHeaders(),
`Prefetch ${prefetchUrl.href} should work.`);
else
assert_not_prefetched(await agent.getRequestHeaders(),
`${prefetchUrl.href} should not be prefetched.`);
await agent.execute_script(
() => window.entries = performance.getEntriesByType('navigation'));
// TODO(crbug/1317756): Currently the initial prefetch request bypasses the
// HTTP cache. Expand test coverage for cache and cache+revalidation cases.
//
// We do not assert the exact size of `resources/executor.sub.html` since it
// would be a headache to update this test everytime executor.sub.html
// changes.
assert_equals(await agent.execute_script(() => window.entries.length), 1,
'Wrong number of entries');
const entry =
await agent.execute_script(() => window.entries[0]);
const bodySize = entry.encodedBodySize;
assert_greater_than(bodySize, 0);
assert_equals(entry.transferSize, headerSize + bodySize);
assert_equals(entry.decodedBodySize, bodySize);
}, `PerformanceNavigationTiming.transferSize/encodedBodySize/decodedBodySize test, same origin prefetch.`);
</script>
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