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<!doctype html>
<html>
<head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<script>
async_test(function (t) {
assert_implements(window.PerformanceLongTaskTiming, 'Longtasks are not supported.');
const observer = new PerformanceObserver(
t.step_func(function (entryList) {
const entries = entryList.getEntries();
assert_greater_than_equal(entries.length, 1);
const entry = entries[0];
assert_equals(typeof(entry.toJSON), 'function');
const entryJSON = entry.toJSON();
assert_equals(typeof(entryJSON), 'object');
// Check attributes inheritted from PerformanceEntry.
const performanceEntryKeys = [
'name',
'entryType',
'startTime',
'duration'
];
for (const key of performanceEntryKeys) {
assert_equals(entryJSON[key], entry[key],
`entry.toJSON().${key} should match entry.${key}`);
}
// Check PerformanceLongTaskTiming specific entries.
assert_equals(typeof(entryJSON.attribution), 'object');
const entryJsonAttribution = entryJSON.attribution[0];
assert_equals(typeof(entryJsonAttribution), 'object');
assert_equals(entryJSON.attribution.length, entry.attribution.length);
// Check TaskAttributionTiming toJSON.
const entryAttribution = entry.attribution[0];
assert_equals(typeof(entryAttribution.toJSON), 'function');
const entryAttributionJSON = entryAttribution.toJSON();
assert_equals(typeof(entryAttributionJSON), 'object');
// Check TaskAttributionTiming attributes, from both:
// 1) |entryJsonAttribution| from PerformanceLongTaskTiming.
// 2) |entryAttributionJSON| from TaskAttributionTiming.
const taskAttributionTimingKeys = [
'name',
'entryType',
'startTime',
'duration',
'containerType',
'containerSrc',
'containerId',
'containerName'
];
for (const key of taskAttributionTimingKeys) {
assert_equals(entryAttributionJSON[key], entryAttribution[key],
`attribution.toJSON().${key} should match attribution.${key}`);
assert_equals(entryJsonAttribution[key], entryAttribution[key],
`entry.toJSON().attribution[0].${key} should match attribution.${key}`);
}
t.done();
})
);
observer.observe({entryTypes: ['longtask']});
window.onload = () => {
// Trigger a long task.
const begin = window.performance.now();
while (window.performance.now() < begin + 60);
};
}, 'Test toJSON() in PerformanceLongTaskTiming and TaskAttributionTiming');
</script>
</body>
</html>
|
