nav2-test-response-end-and-duration-before-during-and-after-load-event.html

<!DOCTYPE HTML>
<html>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<iframe src="resources/respond-slowly.py"></iframe>
<body>
<script>
async_test(function(t) {
  window.addEventListener('message', t.step_func_done(function(event) {
    let originalResponseEnd = event.data[0];
    let originalDuration = event.data[1];
    let responseEndDuringLoadEvent = event.data[2];
    let durationDuringLoadEvent = event.data[3];
    let responseEndAfterLoadEvent = event.data[4];
    let durationAfterLoadEvent = event.data[5];
    assert_equals(originalResponseEnd, 0, "PerformanceNavigationTiming.responseEnd == 0 before load event");
    assert_equals(originalDuration, 0, "PerformanceNavigationTiming.duration is 0 before load event");
    assert_greater_than(responseEndDuringLoadEvent, 500, "PerformanceNavigationTiming.responseEnd is reasonable during load event");
    assert_equals(durationDuringLoadEvent, 0, "PerformanceNavigationTiming.duration is 0 during load event");
    assert_greater_than(responseEndAfterLoadEvent, 500, "PerformanceNavigationTiming.responseEnd is reasonable after load event");
    assert_greater_than(durationAfterLoadEvent, 500, "PerformanceNavigationTiming.duration is reasonable after load event");
  }));
}, "Check that performance.getEntriesByType('navigation')[0].responseEnd has reasonable values before and after the load has finished");
</script>
</body>
</html>

chromium/third_party/blink/web_tests/external/wpt/navigation-timing/nav2-test-response-end-and-duration-before-during-and-after-load-event.html