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add a PerformanceObserver test

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Halil Durak
2026-01-04 18:09:45 +03:00
parent 946b6d8226
commit f7fe8d00fb
1 changed files with 38 additions and 0 deletions
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38
src/browser/tests/performance_observer/performance_observer.html Normal file
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<!DOCTYPE html>
<script src="../testing.js"></script>
<script id="observe_performance_mark">
{
const observer = new PerformanceObserver((list, observer) => {
testing.expectEqual(true, list instanceof PerformanceObserverEntryList);
testing.expectEqual(true, observer instanceof PerformanceObserver);
const entries = list.getEntries();
testing.expectEqual(true, entries instanceof Array);
testing.expectEqual(2, entries.length);
{
const { name, startTime, duration, entryType } = entries[0];
testing.expectEqual("operationStart", name);
testing.expectEqual(20, startTime);
testing.expectEqual(0, duration);
testing.expectEqual("mark", entryType);
}
{
const { name, startTime, duration, entryType } = entries[1];
testing.expectEqual("operationEnd", name);
testing.expectEqual(34.0, startTime);
testing.expectEqual(0, duration);
testing.expectEqual("mark", entryType);
}
observer.disconnect();
});
// Look for performance marks.
observer.observe({ type: "mark" });
performance.mark("operationStart", { startTime: 20.0 });
performance.mark("operationEnd", { startTime: 34.0 });
}
</script>