performance-observer.html | Explore in Territory

<!DOCTYPE html>
<script src="../../resources/js-test.js"></script>
<script>

description("This tests that PerformanceObserver gets called the right number of times.");

window.jsTestIsAsync = true;

var entries = [];

var expectedEntries = [
    {entryType:'mark', name:'mark_1'},
    {entryType:'mark', name:'mark_2'},
    {entryType:'measure', name:'measure_1'}
];

var observer = new PerformanceObserver(performanceCallback);

function performanceCallback(performanceEntryList)
{
    entries = entries.concat(performanceEntryList.getEntries());
    if (entries.length != expectedEntries.length)
        return;
    shouldBe('entries[0].entryType', 'expectedEntries[0].entryType');
    shouldBe('entries[0].name', 'expectedEntries[0].name');
    shouldBe('entries[1].entryType', 'expectedEntries[1].entryType');
    shouldBe('entries[1].name', 'expectedEntries[1].name');
    shouldBe('entries[2].entryType', 'expectedEntries[2].entryType');
    shouldBe('entries[2].name', 'expectedEntries[2].name');
    finishJSTest();
}

function performMeasure()
{
    window.performance.measure('measure_1', 'mark_1', 'mark_2');
}

var config = { entryTypes: ['mark', 'measure'] };
observer.observe(config);

window.performance.mark('mark_1');
window.performance.mark('mark_2');

window.setTimeout(performMeasure, 0);
</script>
chromium/third_party/blink/web_tests/fast/performance/performance-observer.html
