| <!DOCTYPE html> |
| <body> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <script> |
| async_test(function (t) { |
| window.addEventListener('message', t.step_func(e => { |
| assert_equals(e.data, '2 paint first-paint paint first-contentful-paint'); |
| // When only child frame paints, expect only first-paint. |
| t.step_timeout( function() { |
| const bufferedEntries = performance.getEntriesByType('paint'); |
| assert_equals(bufferedEntries.length, 1); |
| assert_equals(bufferedEntries[0].entryType, 'paint'); |
| assert_equals(bufferedEntries[0].name, 'first-paint'); |
| t.done(); |
| }, 50); |
| })); |
| const iframe = document.createElement('iframe'); |
| iframe.id = 'child-iframe'; |
| iframe.src = 'resources/subframe-painting.html'; |
| document.body.appendChild(iframe); |
| }, 'Parent frame ignores paint-timing events fired from child image rendering.'); |
| </script> |
| </body> |
| </html> |
