| <!DOCTYPE html> |
| <html> |
| <meta charset=utf-8 /> |
| <title>Event Timing: first-input entry should be buffered even without observer</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> |
| async_test(function(t) { |
| if (!window.PerformanceEventTiming) |
| assert_unreached("PerformanceEventTiming is not supported"); |
| |
| function testEntries() { |
| // First callback is not ensured to have the entry. |
| if (performance.getEntriesByType('first-input').length === 0) { |
| t.step_timeout(testEntries, 10); |
| return; |
| } |
| assert_equals(performance.getEntriesByType('first-input').length, 1, |
| "There should be a first-input entry in the performance timeline"); |
| const entry = performance.getEntriesByType('first-input')[0]; |
| assert_equals(entry.name, 'mousedown'); |
| assert_equals(entry.entryType, 'first-input'); |
| assert_greater_than_equal(entry.duration, 104, |
| "The first input was a long one."); |
| t.done(); |
| } |
| clickAndBlockMain('button').then(wait).then(t.step_func(testEntries)); |
| }, |
| "Event Timing: check first-input after onload, observer, click, click." |
| ); |
| </script> |
| </html> |
