restriction-broadcast-channel.https.html (1705B)
1 <!DOCTYPE html> 2 <title>BroadcastChannel#postMessage is deferred</title> 3 <meta name="timeout" content="long"> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <script src="/common/utils.js"></script> 7 <script src="../resources/utils.js"></script> 8 <script src="resources/utils.js"></script> 9 10 <body> 11 <script> 12 setup(() => assertSpeculationRulesIsSupported()); 13 14 promise_test(async t => { 15 const uid = token(); 16 const bc = new PrerenderChannel('test-channel', uid); 17 t.add_cleanup(_ => bc.close()); 18 19 const gotMessage = new Promise(resolve => { 20 bc.addEventListener('message', e => { 21 resolve(e.data); 22 }, { 23 once: true 24 }); 25 }); 26 27 const url = `resources/broadcast-channel.html?uid=${uid}`; 28 window.open(url, '_blank', 'noopener'); 29 30 const result = await gotMessage; 31 const expected = [ 32 { 33 event: 'started waiting BroadcastChannel', 34 prerendering: true 35 }, 36 { 37 event: 'prerendering change', 38 prerendering: false 39 }, 40 { 41 event: 'received message: hello', 42 prerendering: false 43 }, 44 { 45 event: 'finished waiting BroadcastChannel', 46 prerendering: false 47 }, 48 ]; 49 assert_equals(result.length, expected.length); 50 for (let i = 0; i < result.length; i++) { 51 assert_equals(result[i].event, expected[i].event, `event${i}`); 52 assert_equals(result[i].prerendering, expected[i].prerendering, 53 `prerendering${i}`); 54 } 55 56 // Send a close signal to PrerenderEventCollector on the prerendered page. 57 new PrerenderChannel('close', uid).postMessage(''); 58 }, `BroadcastChannel#postMessage should be deferred until the prerendered ` + 59 `page is activated`); 60 </script>