| <!DOCTYPE html> |
| <title>visibilityState must be updated after prerendering</title> |
| <meta name="timeout" content="long"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/common/utils.js"></script> |
| <script src="resources/utils.js"></script> |
| <body> |
| <script> |
| |
| setup(() => assertSpeculationRulesIsSupported()); |
| |
| promise_test(async t => { |
| const uid = token(); |
| const bc = new PrerenderChannel('test-channel', uid); |
| |
| const gotMessage = new Promise(resolve => { |
| bc.addEventListener('message', e => { |
| resolve(e.data); |
| }, { |
| once: true |
| }); |
| }); |
| const url = `resources/visibility-state-check.html?uid=${uid}`; |
| window.open(url, '_blank', 'noopener'); |
| |
| const result = await gotMessage; |
| const expected = [ |
| { |
| event: 'Initial visibilityState: hidden', |
| prerendering: true |
| }, |
| { |
| event: 'started waiting visibilityState check', |
| prerendering: true |
| }, |
| { |
| event: 'visibilityState after prerenderingchange: visible', |
| prerendering: false |
| }, |
| { |
| event: 'finished waiting visibilityState check', |
| prerendering: false |
| } |
| ]; |
| assert_equals(result.length, expected.length); |
| for (let i = 0; i < result.length; i++) { |
| assert_equals(result[i].event, expected[i].event, `event${i}`); |
| assert_equals(result[i].prerendering, expected[i].prerendering, |
| `prerendering${i}`); |
| } |
| |
| new PrerenderChannel('close', uid).postMessage('') |
| }, 'The visibilityState must be updated after prerendering.'); |
| |
| </script> |
| </body> |
