<!DOCTYPE html>
<meta name="timeout" content="long">
<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="?cross-site">
<meta name="variant" content="?same-site">
<script>
setup(() => assertSpeculationRulesIsSupported());
// In https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate,
// `sourceDocument` (instead of `navigable`'s active document) should be
// used as the referring document for prefetch.
//
// Nonetheless, a prefetch in a top-level window is not suitable to use in an iframe.
// In particular, browsers partition storage and cache by top-level site.
// If a browser does start allowing these in narrower cases where the partition
// would nonetheless be the same, this test might need tweaking.
promise_test(async t => {
const win = await spawnWindow(t, { protocol: 'https' });
const hostname =
location.search === '?cross-site' ? '{{hosts[alt][www]}}' : undefined;
const nextUrl = win.getExecutorURL({ protocol: 'https', hostname, page: 2 });
await win.forceSinglePrefetch(nextUrl);
// In https://html.spec.whatwg.org/multipage/browsing-the-web.html#navigate,
// `sourceDocument` is the incumbent Document and thus `win`'s Document.
// `navigable`'s active document is `iframe`'s Document.
await win.execute_script((url) => {
window.executor.suspend(() => {
const iframe = document.createElement('iframe');
document.body.appendChild(iframe);
iframe.contentWindow.location.href = url;
});
}, [nextUrl]);
// Below, the scripts given to `win.execute_script()` are executed on the
// `nextUrl` page in the iframe, because `window.executor.suspend()` above
// made `win`'s original page stop processing `execute_script()`,
// while the new page of `nextUrl` in the iframe starts processing
// `execute_script()` for the same ID.
assert_equals(
await win.execute_script(() => location.href),
nextUrl.toString(),
"expected navigation to reach destination URL");
assert_not_prefetched(await win.getRequestHeaders());
}, `location.href across iframe`);
</script>
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