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

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

const searchParams = new URLSearchParams(location.search);
const prefetchEnabled = searchParams.has('prefetch');

promise_test(async t => {
    const agent = await spawnWindow(t);
    // Some meaningless query param to avoid cached response.
    const prefetchUrl = agent.getExecutorURL({ a: "b" });

    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.`);
    }

    const entries = await agent.execute_script(
      () => performance.getEntriesByType('navigation'));
    assert_equals(entries.length, 1, 'Wrong number of navigation entries');
    const entry = entries[0];

    // Events timeline:
    //   ... -> connectEnd --> requestStart --> responseStart --> ...
    if (prefetchEnabled) {
      assert_equals(entry.connectEnd, entry.requestStart);
      assert_equals(entry.requestStart, entry.responseStart);
    } else {
      assert_less_than_equal(entry.connectEnd, entry.requestStart);
      assert_less_than_equal(entry.requestStart, entry.responseStart);
    }

  }, "PerformanceNavigationTiming.requestStart/responseStart test, same origin prefetch.");
</script>
