MediaStream-gettrackid.https.html (1304B)
1 <!doctype html> 2 <html> 3 <head> 4 <title>Retrieving a track from a MediaStream</title> 5 <link rel="author" title="Dominique Hazael-Massieux" href="mailto:dom@w3.org"/> 6 <link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#widl-MediaStream-getTrackById-MediaStreamTrack-DOMString-trackId"> 7 </head> 8 <body> 9 <p class="instructions">When prompted, accept to share your video stream.</p> 10 <h1 class="instructions">Description</h1> 11 <p class="instructions">This test checks that MediaStream.getTrackById behaves as expected</p> 12 13 <div id='log'></div> 14 <script src=/resources/testharness.js></script> 15 <script src=/resources/testharnessreport.js></script> 16 <script src=/resources/testdriver.js></script> 17 <script src=/resources/testdriver-vendor.js></script> 18 <script src=permission-helper.js></script> 19 <script> 20 promise_test(async () => { 21 await setMediaPermission("granted", ["camera"]); 22 const stream = await navigator.mediaDevices.getUserMedia({video: true}); 23 var track = stream.getVideoTracks()[0]; 24 assert_equals(track, stream.getTrackById(track.id), "getTrackById returns track of given id"); 25 assert_equals(stream.getTrackById(track.id + "foo"), null, "getTrackById of inexistant id returns null"); 26 }, "Tests that MediaStream.getTrackById works as expected"); 27 </script> 28 </body> 29 </html>