| <!DOCTYPE html> |
| <meta charset=utf-8> |
| <title>Test basic functionality of document timeline phases.</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| 'use strict'; |
| promise_test(async t => { |
| const timeline = new DocumentTimeline(); |
| assert_equals(timeline.phase, "active"); |
| }, 'Document timeline starts in "active" phase.'); |
| |
| promise_test(async t => { |
| const timeline = new DocumentTimeline(); |
| assert_throws_js(TypeError, () => { |
| timeline.phase = "after"; |
| }); |
| }, 'Setting document timeline phase (which is readonly) throws TypeError.'); |
| </script> |
