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// META: script=/resources/WebIDLParser.js
// META: script=/resources/idlharness.js
// https://w3c.github.io/longtasks/
'use strict';
idl_test(
['longtasks'],
['performance-timeline', 'hr-time'],
(idl_array, t) => new Promise((resolve, reject) => {
const longTask = () => {
const begin = self.performance.now();
while (self.performance.now() < begin + 100);
}
t.step_timeout(longTask, 0);
const observer = new PerformanceObserver((entryList, observer) => {
const entries = Array.from(entryList.getEntries());
idl_array.add_objects({
PerformanceLongTaskTiming: entries.slice(0, 1),
TaskAttributionTiming: entries[0].attribution,
});
observer.disconnect();
resolve();
});
observer.observe({entryTypes: ['longtask']});
t.step_timeout(() => {
reject('longtask entry was not observed');
}, 1000);
})
);
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