| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <meta charset="utf-8" /> |
| <title>This test validates element timing information for same-origin redirect chain.</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/element-timing-helpers.js"></script> |
| </head> |
| <body> |
| <script> |
| async_test(t => { |
| assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented"); |
| // First redirect |
| let destUrl = '/common/redirect.py?location=' |
| // Second redirect |
| destUrl += '/common/redirect.py?location=' |
| // Image without TAO headers. |
| destUrl += '/element-timing/resources/square20.png'; |
| let beforeRender; |
| new PerformanceObserver(t.step_func_done(entries => { |
| assert_equals(entries.getEntries().length, 1, 'There should be one entry'); |
| const entry = entries.getEntries()[0]; |
| checkElement(entry, location.origin + destUrl, 'et', 'id', beforeRender, |
| document.getElementById('id')); |
| })).observe({entryTypes: ['element']}); |
| const image = document.createElement('img'); |
| image.src = destUrl; |
| image.setAttribute('elementtiming', 'et'); |
| image.setAttribute('id', 'id') |
| document.body.appendChild(image); |
| beforeRender = performance.now(); |
| }, 'Same-origin image redirect without TAO should have its renderTime set.'); |
| </script> |
| </body> |
| </html> |
| |