ukm-get-metrics.html | Explore in Territory

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
promise_test(async () => {
  const recorder = internals.initializeUKMRecorder();
  await new Promise(resolve => requestAnimationFrame(() => {
    document.querySelector("#log").innerHTML = "Update";
    requestAnimationFrame(resolve);
  }));
  window.performance.getEntriesByType("resource");
  const metrics = recorder.getMetrics("Blink.UpdateTime", ["Layout", "Paint"]);
  assert_greater_than_equal(metrics.length, 1);
  assert_array_equals(Object.keys(metrics[0]), ["Layout", "Paint"]);
}, "UKM recorder should receive the Blink.UpdateTime entry");
</script>
<body>
  <div id="log"></div>
</body>

chromium/third_party/blink/web_tests/wpt_internal/ukm/ukm-get-metrics.html