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Test Info: Warnings

<!DOCTYPE html>
Test permissions policy on enumerateDevices() after getUserMedia()
<meta charset=utf-8>
<p class="instructions">If prompted, <strong>please allow</strong> access to
a microphone device.</p>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="/permissions-policy/resources/permissions-policy.js"></script>
'use strict';
promise_test(async () => {
const frame = document.createElement('iframe');
frame.allow = "speaker-selection 'none'"
const promise_load = new Promise(r => frame.onload = r);
await promise_load;
const fDevices = frame.contentWindow.navigator.mediaDevices;
await fDevices.getUserMedia({ audio: true });
const list = await fDevices.enumerateDevices();
const outputDevicesList = list.filter(({kind}) => kind == "audiooutput");
assert_equals(outputDevicesList.length, 0, "number of output devices.");
}, "permissions policy on enumerateDevices() after getUserMedia()");