<!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="?prefetch=true&bypass_cache=true">
<meta name="variant" content="?prefetch=false&bypass_cache=true">
<meta name="variant" content="?prefetch=true&bypass_cache=false">
<meta name="variant" content="?prefetch=false&bypass_cache=false">

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

const prefetchEnabled = (Object.fromEntries(
  new URLSearchParams(location.search)).prefetch === "true");
const bypassCache = (Object.fromEntries(
  new URLSearchParams(location.search)).bypass_cache === "true");

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'));

    // Expects one entry, whose `deliveryType` is "navigational-prefetch" for
    // the prefetched request, and "" for the non-prefetched.
    //
    // TODO(crbug/1317756): Currently the initial prefetch request bypasses the
    // HTTP cache, making `deliveryType` always an empty string for non-prefetch
    // request. Expand test coverage when `net::LOAD_DISABLE_CACHE` is removed.
    assert_equals(await agent.execute_script(() => window.entries.length), 1,
      'Wrong number of entries');
    const deliveryType =
      await agent.execute_script(() => window.entries[0].deliveryType);
    const expectedDeliveryType = prefetchEnabled ? 'navigational-prefetch' : '';
    assert_equals(deliveryType, expectedDeliveryType);

  }, `PerformanceNavigationTiming.deliveryType test, same origin prefetch.`);
</script>
