speculation-rules/prefetch/different-initiators.sub.https.html

<!DOCTYPE html>
<meta name="timeout" content="long">
<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>
<script src="../resources/utils.js"></script>
<script src="resources/utils.sub.js"></script>
<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>

<meta name="variant" content="?cross-site-1">
<meta name="variant" content="?cross-site-2">
<meta name="variant" content="?same-site">

<script>
setup(() => assertSpeculationRulesIsSupported());

// Regression test for https://crbug.com/1423234.
promise_test(async t => {
  // Open 2 windows.
  const hostname1 =
      location.search === '?cross-site-1' ? '{{hosts[alt][www]}}' : undefined;
  const hostname2 =
      location.search === '?cross-site-2' ? '{{hosts[alt][www]}}' : undefined;
  const initiator1 = await spawnWindow(
      t, { protocol: 'https', hostname: hostname1 });
  const initiator2 = await spawnWindow(
      t, { protocol: 'https', hostname: hostname2 });

  // Start speculation rules prefetch from `initiator1`.
  const nextUrl = initiator1.getExecutorURL({ protocol: 'https', page: 2 });
  await initiator1.forceSinglePrefetch(nextUrl);

  // Register a SW for `nextUrl` -- this is a trick to make the prefetched
  // result to put in `PrefetchService::prefetches_ready_to_serve_` in
  // Chromium implementation but actually not used by this navigation.
  const r = await service_worker_unregister_and_register(
      t, 'resources/sw.js', nextUrl);
  await wait_for_state(t, r.installing, 'activated');

  // Navigate `initiator1`.
  // This doesn't use the prefetched result due to the ServiceWorker.
  await initiator1.navigate(nextUrl);

  // Navigate `initiator1` away from `nextUrl`.
  const headers1 = await initiator1.execute_script(() => {
    window.executor.suspend(() => {
      location.href = 'about:blank';
    });
    return requestHeaders;
  }, []);

  // Unregister the SW.
  await service_worker_unregister(t, nextUrl);

  // Navigate `initiator2`.
  // This shouldn't use the prefetched result because the initiator Documents
  // (even sites) are different.
  await initiator2.execute_script((url) => {
    window.executor.suspend(() => {
      location.href = url;
    });
  }, [nextUrl]);

  // Note: while the Window for `initiator2` remains open, the executor ID of
  // the page is the ID of `nextUrl`, which is `initiator1.context_id`.
  // So `initiator1` is used below for manipulating the Window for `initiator2`.
  assert_equals(
      await initiator1.execute_script(() => location.href),
      nextUrl.toString(),
      "expected navigation to reach destination URL");

  const headers2 = await initiator1.execute_script(() => {
    return requestHeaders;
  }, []);

  assert_not_prefetched(headers1,
      "Prefetch should not work due to ServiceWorker.");

  assert_not_prefetched(headers2,
      "Prefetch should not work for different initiators.");
}, "Cross-initiator prefetches using ServiceWorker tricks");
</script>