| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <meta charset="utf-8" /> |
| <title>This test validates LargestContenfulPaint information for cross-origin redirect chain images.</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/largest-contentful-paint-helpers.js"></script> |
| <script src=/common/get-host-info.sub.js></script> |
| </head> |
| <body> |
| <script> |
| async_test(t => { |
| if (!window.LargestContentfulPaint) { |
| assert_unreached("LargestContentfulPaint is not implemented"); |
| } |
| let destUrl = get_host_info().HTTP_REMOTE_ORIGIN |
| + '/resource-timing/resources/multi_redirect.py?'; |
| destUrl += 'page_origin=' + get_host_info().HTTP_ORIGIN; |
| destUrl += '&cross_origin=' + get_host_info().HTTP_REMOTE_ORIGIN; |
| destUrl += '&final_resource=' + '/element-timing/resources/circle.svg'; |
| destUrl += '&timing_allow=1'; |
| destUrl += '&tao_steps='; |
| |
| const image = document.createElement('img'); |
| image.src = destUrl + '0'; |
| image.setAttribute('id', 'id'); |
| document.body.appendChild(image); |
| |
| let numObserved = 0; |
| let beforeLoad = performance.now(); |
| |
| new PerformanceObserver(t.step_func(entries => { |
| assert_equals(entries.getEntries().length, 1); |
| const entry = entries.getEntries()[0]; |
| const options = numObserved === 3 ? [] : ['renderTimeIs0']; |
| checkImage(entry, destUrl + numObserved, 'id', 200 * 200, beforeLoad, options); |
| numObserved++; |
| if (numObserved === 4) |
| t.done(); |
| else { |
| // Change the image to trigger a new LCP entry. |
| const img = document.getElementById('id'); |
| image.src = destUrl + numObserved; |
| beforeLoad = performance.now(); |
| } |
| })).observe({type: 'largest-contentful-paint'}); |
| }, 'Cross-origin image without TAO should not have its renderTime set, with full TAO it should.'); |
| </script> |
| </body> |
| </html> |
| |
