| <!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 === 'mousedown')); |
| 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> |
