restriction-web-serial.tentative.https.html (1818B)
1 <!DOCTYPE html> 2 <title>Access to the Web Serial API 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 18 const gotMessage = new Promise(resolve => { 19 bc.addEventListener('message', e => { 20 resolve(e.data); 21 }, { 22 once: true 23 }); 24 }); 25 const url = `resources/web-serial.https.html?uid=${uid}`; 26 window.open(url, '_blank', 'noopener'); 27 28 const result = await gotMessage; 29 const expected = [ 30 {event: 'started waiting navigator.serial.getPorts', prerendering: true}, 31 {event: 'prerendering change', prerendering: false}, 32 {event: 'finished waiting navigator.serial.getPorts', prerendering: false}, 33 ]; 34 // The spec, https://wicg.github.io/nav-speculation/prerendering.html#patch-serial, 35 // says that Web Serial API has delay while prerendering for 36 // requestPort(). As this test uses getPorts(), it's a tentative test. 37 assert_equals(result.length, expected.length); 38 for (let i = 0; i < result.length; i++) { 39 assert_equals(result[i].event, expected[i].event, `event[${i}]`); 40 assert_equals(result[i].prerendering, expected[i].prerendering, 41 `prerendering[${i}]`); 42 } 43 bc.close(); 44 45 // Send a close signal to PrerenderEventCollector on the prerendered page. 46 new PrerenderChannel('close', uid).postMessage(''); 47 }, `the access to the Web Serial API should be deferred until the prerendered 48 page is activated`); 49 </script>