loaf-use-counter.html | Explore in Territory

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>

const kLongAnimationFrameObserver = 4577;
const kLongAnimationFrameRequested = 4578;

function clear() {
  internals.clearUseCounter(document, kLongAnimationFrameObserver);
  internals.clearUseCounter(document, kLongAnimationFrameRequested);
}

promise_test(async () => {
  clear();
  performance.getEntries();
  performance.getEntriesByName("long-animation-frame");
  performance.getEntriesByType("longtask");
  new PerformanceObserver(() => {}).observe({entryTypes: ["resource"]});
  assert_false(internals.isUseCounted(document, kLongAnimationFrameObserver));
  assert_false(internals.isUseCounted(document, kLongAnimationFrameRequested));
}, "UseCounter for LoAF should not be triggered for non-loaf types");

promise_test(async () => {
  clear();
  performance.getEntriesByType("long-animation-frame");
  assert_false(internals.isUseCounted(document, kLongAnimationFrameObserver));
  assert_true(internals.isUseCounted(document, kLongAnimationFrameRequested));
}, "UseCounter for LoAF requested should be triggered at appropriate times");

promise_test(async () => {
  clear();
  new PerformanceObserver(() => {}).observe({type: "long-animation-frame"});
  assert_true(internals.isUseCounted(document, kLongAnimationFrameObserver));
  assert_false(internals.isUseCounted(document, kLongAnimationFrameRequested));
}, "UseCounter for LoAF observer should be triggered at appropriate times");
</script>
<body>
  <div id="log"></div>
</body>
chromium/third_party/blink/web_tests/wpt_internal/long-animation-frame/loaf-use-counter.html
