| <!doctype html> |
| <meta charset=utf-8> |
| <title>Document timelines</title> |
| <link rel="help" href="https://drafts.csswg.org/web-animations/#document-timelines"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="../../testcommon.js"></script> |
| <div id="log"></div> |
| <script> |
| 'use strict'; |
| |
| async_test(t => { |
| assert_greater_than_equal(document.timeline.currentTime, 0, |
| 'The current time is initially is positive or zero'); |
| |
| // document.timeline.currentTime should be set even before document |
| // load fires. We expect this code to be run before document load and hence |
| // the above assertion is sufficient. |
| // If the following assertion fails, this test needs to be redesigned. |
| assert_not_equals(document.readyState, 'complete', |
| 'Test is running prior to document load'); |
| |
| // Test that the document timeline's current time is measured from |
| // navigationStart. |
| // |
| // We can't just compare document.timeline.currentTime to |
| // window.performance.now() because currentTime is only updated on a sample |
| // so we use requestAnimationFrame instead. |
| window.requestAnimationFrame(rafTime => { |
| t.step(() => { |
| assert_equals(document.timeline.currentTime, rafTime, |
| 'The current time matches requestAnimationFrame time'); |
| }); |
| t.done(); |
| }); |
| }, 'Document timelines report current time relative to navigationStart'); |
| |
| async_test(t => { |
| window.requestAnimationFrame(rafTime => { |
| t.step(() => { |
| const iframe = document.createElement('iframe'); |
| document.body.appendChild(iframe); |
| assert_greater_than_equal(iframe.contentDocument.timeline.currentTime, 0, |
| 'The current time of a new iframe is initially is positive or zero'); |
| }); |
| t.done(); |
| }); |
| }, 'Child frames do not report negative initial times'); |
| |
| </script> |
