зеркало из https://github.com/mozilla/gecko-dev.git
60 строки
2.1 KiB
HTML
60 строки
2.1 KiB
HTML
<!DOCTYPE HTML>
|
|
<meta charset=utf-8>
|
|
<title>LongTask Timing: long task in external script</title>
|
|
<body>
|
|
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<script src="resources/utils.js"></script>
|
|
|
|
<h1>Long Task: External Script</h1>
|
|
<div id="log"></div>
|
|
<script>
|
|
promise_test(function(t) {
|
|
assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');
|
|
const performanceObserverTimeout = 5 * 1000;
|
|
const longTasksPromise = new Promise(resolve => {
|
|
const observer = new PerformanceObserver(
|
|
t.step_func(function(entryList) {
|
|
const entries = entryList.getEntries();
|
|
entries.forEach(longtask => {
|
|
assert_equals(longtask.entryType, 'longtask');
|
|
if (hasUnrelatedTaskName(longtask.name, 'self')) {
|
|
return;
|
|
}
|
|
checkLongTaskEntry(longtask);
|
|
// Assert the TaskAttributionTiming entry in attribution.
|
|
assert_equals(longtask.attribution.length, 1,
|
|
'Exactly one attribution entry is expected');
|
|
const attribution = longtask.attribution[0];
|
|
assert_equals(attribution.entryType, 'taskattribution');
|
|
assert_equals(attribution.name, 'unknown');
|
|
assert_equals(attribution.duration, 0);
|
|
assert_equals(attribution.startTime, 0);
|
|
assert_equals(attribution.containerType, 'window');
|
|
assert_equals(attribution.containerId, '');
|
|
assert_equals(attribution.containerName, '');
|
|
assert_equals(attribution.containerSrc, '');
|
|
observer.disconnect();
|
|
resolve();
|
|
})
|
|
}));
|
|
observer.observe({
|
|
entryTypes: ['longtask']
|
|
});
|
|
const script = document.createElement('script');
|
|
script.src = 'resources/makelongtask.js';
|
|
document.body.appendChild(script);
|
|
});
|
|
const timeout = new Promise(
|
|
(resolve, reject) => t.step_timeout(
|
|
() => {
|
|
reject(new Error('observer failed to find any entries'))
|
|
},
|
|
performanceObserverTimeout)
|
|
)
|
|
return Promise.race([longTasksPromise, timeout]);
|
|
}, 'Performance longtask entries are observable.');
|
|
</script>
|
|
</body>
|