| <!doctype html> |
| <head> |
| <title>Test effect of selectAudioOutput() on audiooutput devices from enumerateDevices()</title> |
| <link rel="help" href="https://w3c.github.io/mediacapture-output/#dom-mediadevices-selectaudiooutput"> |
| </head> |
| <body> |
| <p class="instructions">If prompted, <strong>please allow</strong> access to |
| an audio output device.</p> |
| </body> |
| <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> |
| 'use strict'; |
| |
| promise_test(async () => { |
| const devices = await navigator.mediaDevices.enumerateDevices(); |
| const outputDevices = devices.filter(info => info.kind == "audiooutput"); |
| assert_equals(outputDevices.length, 0, "number of audiooutput devices."); |
| }, "enumerateDevices() returns no audiooutput devices before permission grant"); |
| |
| let selected; |
| |
| promise_test(async t => { |
| await test_driver.bless('transient activation for selectAudioOutput()'); |
| selected = await navigator.mediaDevices.selectAudioOutput(); |
| assert_true(selected instanceof MediaDeviceInfo, |
| "resolves with a MediaDeviceInfo."); |
| assert_equals(selected.kind, "audiooutput", "selected.kind"); |
| assert_greater_than(selected.deviceId.length, 0, "selected.deviceId.length"); |
| assert_greater_than(selected.groupId.length, 0, "selected.groupId.length"); |
| assert_not_equals(selected.label, undefined, "selected.label"); |
| }, "selectAudioOutput()"); |
| |
| promise_test(async () => { |
| // "Once a device is exposed after a call to selectAudioOutput, it MUST be |
| // listed by enumerateDevices() for the current browsing context." |
| const devices = await navigator.mediaDevices.enumerateDevices(); |
| const outputDevices = devices.filter(info => info.kind == "audiooutput"); |
| assert_equals(outputDevices.length, 1, "number of audiooutput devices."); |
| assert_not_equals(selected, undefined); |
| const [info] = outputDevices; |
| assert_equals(info.deviceId, selected.deviceId, "deviceId exposed"); |
| assert_equals(info.groupId, selected.groupId, "groupId exposed"); |
| assert_equals(info.label, selected.label, "label exposed"); |
| }, "enumerateDevices() after selectAudioOutput()"); |
| </script> |
