27 lines
1.3 KiB
JavaScript
27 lines
1.3 KiB
JavaScript
async_test(t => {
|
|
// First observer creates second in callback to ensure the entry has been dispatched by the time
|
|
// the second observer begins observing.
|
|
new PerformanceObserver(() => {
|
|
// Second observer requires 'buffered: true' to see an entry.
|
|
new PerformanceObserver(t.step_func_done(list => {
|
|
const entries = list.getEntries();
|
|
assert_equals(entries.length, 1, 'There should be 1 mark entry.');
|
|
assert_equals(entries[0].entryType, 'mark');
|
|
})).observe({type: 'mark', buffered: true});
|
|
}).observe({entryTypes: ['mark']});
|
|
performance.mark('foo');
|
|
}, 'PerformanceObserver with buffered flag sees previous marks');
|
|
|
|
async_test(t => {
|
|
// First observer creates second in callback to ensure the entry has been dispatched by the time
|
|
// the second observer begins observing.
|
|
new PerformanceObserver(() => {
|
|
// Second observer requires 'buffered: true' to see an entry.
|
|
new PerformanceObserver(t.step_func_done(list => {
|
|
const entries = list.getEntries();
|
|
assert_equals(entries.length, 1, 'There should be 1 measure entry.');
|
|
assert_equals(entries[0].entryType, 'measure');
|
|
})).observe({type: 'measure', buffered: true});
|
|
}).observe({entryTypes: ['measure']});
|
|
performance.measure('bar');
|
|
}, 'PerformanceObserver with buffered flag sees previous measures');
|