| <!DOCTYPE html> |
| <html> |
| <meta charset=utf-8 /> |
| <title>Event Timing only times certain types of trusted event. |
| </title> |
| <button id='button' onfocus='mainThreadBusy(100)'>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-support.js></script> |
| <script> |
| let trustedClickStart = 0; |
| |
| function untrustedClickAndBlockMain(id) { |
| return new Promise((resolve, reject) => { |
| const target = document.getElementById(id); |
| target.dispatchEvent(new MouseEvent('click')); |
| // Block mainthread in the callback, as dispatchEvent() is an sync call. |
| resolve(); |
| }); |
| } |
| |
| function trustedFocusAndBlockMain(id) { |
| return new Promise((resolve, reject) => { |
| const target = document.getElementById(id); |
| trustedFocusStart = performance.now(); |
| target.focus(); |
| // Block mainthread in the callback, as focus() is an sync call. |
| resolve(); |
| }); |
| } |
| |
| async_test(function(t) { |
| new PerformanceObserver(entryList => { |
| const observerCallbackTime = performance.now(); |
| const entries = entryList.getEntries(); |
| t.step(()=>{ |
| assert_equals(entries.length, 1, |
| "Observe more than one entries: " + |
| JSON.stringify(entries) + "."); |
| assert_equals(entries[0].name, 'click', |
| "The observed entry should be a click"); |
| assert_greater_than(observerCallbackTime, entries[0].startTime, |
| "assert(untrustedClickStart > entries[0].startTime) failed"); |
| assert_greater_than(entries[0].startTime, trustedClickStart, |
| "assert(entries[0].startTime > trustedClickStart) failed"); |
| }); |
| t.done(); |
| }).observe({ entryTypes: ['event'] }); |
| // untrusted event of a type event timing cares about |
| untrustedClickAndBlockMain('button').then(wait); |
| // trusted event of a type event timing doesn't cares about |
| trustedFocusAndBlockMain('button').then(wait); |
| // trusted event of a type event timing cares about |
| trustedClickStart = performance.now(); |
| clickAndBlockMain('button').then(wait); |
| }, "Event Timing only times certain types of trusted event."); |
| </script> |
| </html> |
