69 lines
2.8 KiB
HTML
69 lines
2.8 KiB
HTML
<!DOCTYPE html>
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<html>
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<meta charset=utf-8 />
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<title>Event Timing only times certain types of trusted event.
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</title>
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<meta name="timeout" content="long">
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<button id='button' onmousedown='mainThreadBusy(60)'
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onfocus='mainThreadBusy(60)'>Generate a 'click' event</button>
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<script src=/resources/testharness.js></script>
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<script src=/resources/testharnessreport.js></script>
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<script src=/resources/testdriver.js></script>
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<script src=/resources/testdriver-vendor.js></script>
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<script src=resources/event-timing-test-utils.js></script>
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<script>
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let trustedClickStart;
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function trustedClickAndBlockMain(id) {
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trustedClickStart = performance.now();
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return clickAndBlockMain(id);
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}
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function untrustedClickAndBlockMain(id) {
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const target = document.getElementById(id);
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// Block mainthread in the callback, as dispatchEvent() is a sync call.
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target.dispatchEvent(new MouseEvent('mousedown'));
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}
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function trustedFocusAndBlockMain(id) {
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const target = document.getElementById(id);
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trustedFocusStart = performance.now();
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// Block mainthread in the callback, as focus() is a sync call.
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target.focus();
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}
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promise_test(function(t) {
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assert_implements(window.PerformanceEventTiming, 'Event Timing is not supported.');
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let observedMouseDown = false;
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const observerPromise = new Promise(resolve => {
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new PerformanceObserver(t.step_func(entryList => {
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const observerCallbackTime = performance.now();
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const mouseDowns = entryList.getEntriesByName('mousedown');
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// Ignore cases in which there is no mousedown.
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if (mouseDowns.length === 0)
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return;
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assert_false(observedMouseDown, 'Got more than one callback with mousedown.');
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assert_equals(mouseDowns.length, 1,
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"Should only observe one mousedown entry. Instead, got these: " +
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JSON.stringify(mouseDowns) + ".");
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assert_equals(mouseDowns[0].name, 'mousedown',
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"The observed entry should be a mousedown");
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assert_less_than(mouseDowns[0].startTime, observerCallbackTime,
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"The startTime should be before observerCallbackTime");
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assert_greater_than(mouseDowns[0].startTime, trustedClickStart,
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"The startTime should be after trustedClickStart");
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observedMouseDown = true;
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resolve();
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})).observe({ entryTypes: ['event'] });
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});
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// Untrusted event of a type event timing cares about.
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untrustedClickAndBlockMain('button');
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// Trusted event of a type event timing doesn't cares about.
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trustedFocusAndBlockMain('button');
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// Trusted event of a type event timing cares about.
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const clickPromise = trustedClickAndBlockMain('button').then(wait);
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return Promise.all([observerPromise, clickPromise]);
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}, "Event Timing only times certain types of trusted event.");
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</script>
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</html>
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