| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>LongTask Timing: long task in external script</title> |
| <body> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <h1>Long Task: External Script</h1> |
| <div id="log"></div> |
| <script> |
| async_test(function (t) { |
| if (typeof PerformanceLongTaskTiming === 'undefined') { |
| assert_unreached("Longtasks are not supported."); |
| t.done(); |
| } |
| const observer = new PerformanceObserver( |
| t.step_func(function (entryList) { |
| const entries = entryList.getEntries(); |
| assert_equals(entries.length, 1, |
| 'Exactly one entry is expected.'); |
| const longtask = entries[0]; |
| assert_equals(longtask.entryType, 'longtask'); |
| assert_equals(longtask.name, 'self'); |
| assert_greater_than(longtask.duration, 50); |
| |
| // Assert the TaskAttributionTiming entry in attribution. |
| assert_equals(longtask.attribution.length, 1, |
| 'Exactly one attribution entry is expected'); |
| const attribution = longtask.attribution[0]; |
| assert_equals(attribution.entryType, 'taskattribution'); |
| assert_equals(attribution.name, 'unknown'); |
| assert_equals(attribution.duration, 0); |
| assert_equals(attribution.startTime, 0); |
| assert_equals(attribution.containerId, ''); |
| assert_equals(attribution.containerName, ''); |
| assert_equals(attribution.containerSrc, ''); |
| observer.disconnect(); |
| t.done(); |
| }) |
| ); |
| observer.observe({entryTypes: ['longtask']}); |
| window.onload = () => { |
| const script = document.createElement('script'); |
| script.src = 'resources/makelongtask.js'; |
| document.body.appendChild(script); |
| } |
| }, 'Performance longtask entries are observable.'); |
| </script> |
| </body> |
