1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
<!DOCTYPE html>
<html>
<meta charset=utf-8 />
<title>Event Timing: compare timing of two long clicks
</title>
<button id='button'>Generate a 'click' event</button>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=/resources/testdriver.js></script>
<script src=/resources/testdriver-vendor.js></script>
<script src=resources/event-timing-test-utils.js></script>
<script>
/* Timeline:
Observer starts
Long click 1
Long click 2
Once two clicks have been received by observer, compare the timestamps.
*/
let timeBeforeFirstClick;
let timeAfterFirstClick;
let timeAfterSecondClick;
let observedEntries = [];
async_test(function(t) {
assert_implements(window.PerformanceEventTiming, 'Event Timing is not supported.');
new PerformanceObserver(t.step_func(entryList => {
observedEntries = observedEntries.concat(entryList.getEntries().filter(
entry => entry.name === 'pointerdown'));
if (observedEntries.length < 2)
return;
assert_not_equals(timeBeforeFirstClick, undefined);
assert_not_equals(timeAfterFirstClick, undefined);
assert_not_equals(timeAfterSecondClick, undefined);
// First click.
verifyClickEvent(observedEntries[0], 'button');
assert_between_exclusive(observedEntries[0].processingStart,
timeBeforeFirstClick,
timeAfterFirstClick,
"First click's processingStart");
assert_greater_than(timeAfterFirstClick, observedEntries[0].startTime,
"timeAfterFirstClick should be later than first click's start time.");
// Second click.
verifyClickEvent(observedEntries[1], 'button');
assert_between_exclusive(observedEntries[1].processingStart,
timeAfterFirstClick,
timeAfterSecondClick,
"Second click's processingStart");
assert_greater_than(timeAfterSecondClick, observedEntries[1].startTime,
"timeAfterSecondClick should be later than second click's start time.");
t.done();
})).observe({type: 'event'});
timeBeforeFirstClick = performance.now();
clickAndBlockMain('button').then( () => {
timeAfterFirstClick = performance.now();
clickAndBlockMain('button').then(() => {
timeAfterSecondClick = performance.now();
})
});
}, "Event Timing: compare click timings.");
</script>
</html>
|
