audio-output/selectAudioOutput-permissions-policy.https.sub.html

<!DOCTYPE html>
<meta charset=utf-8>
<body>
  <script src="/resources/testharness.js"
          type="text/javascript{{GET[in-iframe]}}"></script>
  <script src="/resources/testharnessreport.js"
          type="text/javascript{{GET[in-iframe]}}"></script>
  <script src="/resources/testdriver.js"></script>
  <script src="/resources/testdriver-vendor.js"></script>
  <script src="/common/get-host-info.sub.js"></script>
  <script src="/permissions-policy/resources/permissions-policy.js"></script>
  <script>
  'use strict';

  async function testSelectAudioOutput() {
    await test_driver.bless('transient activation for selectAudioOutput()');
    const selected = await navigator.mediaDevices.selectAudioOutput();

    let devices;
    try {
      devices = await navigator.mediaDevices.enumerateDevices();
    } catch (e) {
      // Throw a unique error to avoid risk of false-pass if e should match
      // an expected error from selectAudioOutput().
      throw Error(`enumerateDevices() failed with ${e}`);
    }
    const selected_devices =
          devices.filter(info => info.deviceId == selected.deviceId);
    // Don't use assert_not_equals() because testharness.js cannot be
    // loaded in the iframe with testdriver.js.
    if (selected_devices.length != 1) {
      throw Error('Device count matching selected is ' +
                  selected_devices.length);
    }
  }

  if (page_loaded_in_iframe()) {
    test_driver.set_test_context(window.parent);
  }
  const cross_domain = get_host_info().HTTPS_REMOTE_ORIGIN;
  run_all_fp_tests_allow_self(
    cross_domain,
    'speaker-selection',
    'NotAllowedError',
    testSelectAudioOutput
  );
  </script>
</body>