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Test Info: Warnings

<!DOCTYPE html>
<meta charset=utf-8 />
<div id='div' onclick='delay()'>Click me</div>
<div id='div2'>No, click me!</div>
<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>
let delayCalled = false;
let beforeClick;
function delay() {
const end = + 150;
while( < end) {}
delayCalled = true;
promise_test(function(t) {
assert_implements(window.PerformanceEventTiming, 'Event Timing is not supported.');
let observedMouseDown = false;
const observerPromise = new Promise(resolve => {
const observer = new PerformanceObserver(t.step_func(entryList => {
const mouseDowns = entryList.getEntriesByName('mousedown');
// Ignore cases in which there is no mousedown.
if (mouseDowns.length === 0)
assert_false(observedMouseDown, 'There must only be one mousedown entry.');
assert_equals(mouseDowns.length, 1);
const entry = mouseDowns[0];
// This ensures that the entry is exposing timing from the second click, i.e.
// the one from the clickAndBlockMain() call.
assert_greater_than_equal(entry.processingStart, beforeClick);
verifyClickEvent(entry, 'div2', true);
observedMouseDown = true;
observer.observe({entryTypes: ['event']});
// Take the timestamp after the programmatic click but before the next click.
beforeClick =;
// After the programmatic click, use another input to know when entries have been
// dispatched to the PerformanceObserver callback.
const clickPromise = clickAndBlockMain('div2');
return Promise.all([observerPromise, clickPromise]);
}, "Event Timing: events from programmatic click are not observed");