<!doctype html> <html> <head> <title>getUserMedia({audio:true}) creates a stream with at least an audio track</title> <link rel="author" title="Dominique Hazael-Massieux" href="mailto:dom@w3.org"/> <link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#widl-NavigatorUserMedia-getUserMedia-void-MediaStreamConstraints-constraints-NavigatorUserMediaSuccessCallback-successCallback-NavigatorUserMediaErrorCallback-errorCallback"> <link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#widl-MediaStreamTrack-kind"> </head> <body> <p class="instructions">When prompted, accept to share your audio stream.</p> <h1 class="instructions">Description</h1> <p class="instructions">This test checks that the MediaStream object returned by the success callback in getUserMedia has exactly one audio track.</p> <div id='log'></div> <script src=/resources/testharness.js></script> <script src=/resources/testharnessreport.js></script> <script src=/resources/testdriver.js></script> <script src=/resources/testdriver-vendor.js></script> <script src=permission-helper.js></script> <script> promise_test(async () => { await setMediaPermission(); const stream = await navigator.mediaDevices.getUserMedia({audio:true}); assert_true(stream instanceof MediaStream, "getUserMedia success callback comes with a MediaStream object"); assert_equals(stream.getAudioTracks().length, 1, "the media stream has exactly one audio track"); assert_equals(stream.getAudioTracks()[0].kind, "audio", "getAudioTracks() returns a sequence of tracks whose kind is 'audio'"); assert_equals(stream.getVideoTracks().length, 0, "the media stream has zero video track"); }, "Tests that a MediaStream with exactly one audio track is returned"); </script> </body> </html>