nav2-test-instance-accessible-from-the-start.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(function() {
  var navigationTiming2 = window.performance.getEntriesByType('navigation')[0];
  assert_not_equals(navigationTiming2, undefined);
  assert_equals(navigationTiming2.entryType, "navigation");
  assert_equals(navigationTiming2.startTime, 0);
  assert_equals(navigationTiming2.initiatorType, "navigation");
  done();
}, "PerformanceNavigationTiming instance exists with reasonable values.");
</script>

chromium/third_party/blink/web_tests/external/wpt/navigation-timing/nav2-test-instance-accessible-from-the-start.html