MediaDevices-enumerateDevices.https.html

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This WPT test may be referenced by the following Test IDs:
- /mediacapture-streams/MediaDevices-enumerateDevices.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<html>

<head>

<title>enumerateDevices: test that enumerateDevices is present (legacy Firefox)</title>

<meta name='assert' content='Check that the enumerateDevices() method is present (legacy Firefox).'/>

</head>

<body>

<h1 class="instructions">Description</h1>

<p class="instructions">This is a modified copy of

testing/web-platform/tests/mediacapture-streams/MediaDevices-enumerateDevices.https.html

testing legacy Firefox version of the <code>navigator.mediaDevices.enumerateDevices()</code> method.</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>

"use strict";

promise_test(async () => {

  assert_not_equals(navigator.mediaDevices.enumerateDevices, undefined, "navigator.mediaDevices.enumerateDevices exists");

  const devices = await navigator.mediaDevices.enumerateDevices();

  for (const {kind, deviceId, label, groupId} of devices) {

    assert_in_array(kind, ["videoinput", "audioinput", "audiooutput"]);

    assert_greater_than(deviceId.length, 0, "deviceId should be present even if getUserMedia was never called successfully (legacy).");

    assert_equals(label, "", "label should be empty string if getUserMedia was never called successfully.");

    assert_greater_than(groupId.length, 0, "groupId should be present even if getUserMedia was never called successfully (legacy).");

  assert_less_than_equal(devices.filter(({kind}) => kind == "audioinput").length,

                         1, "there should be zero or one audio input device.");

  assert_less_than_equal(devices.filter(({kind}) => kind == "videoinput").length,

                         1, "there should be zero or one video input device.");

  assert_equals(devices.filter(({kind}) => kind == "audiooutput").length,

                0, "there should be no audio output devices.");

  assert_less_than_equal(devices.length, 2,

                         "there should be no more than two devices.");

  if (devices.length > 1) {

    assert_equals(devices[0].kind, "audioinput", "audioinput is first");

    assert_equals(devices[1].kind, "videoinput", "videoinput is second");

}, "mediaDevices.enumerateDevices() is present and working - before capture");

promise_test(async t => {

  await setMediaPermission("granted");

  const stream = await navigator.mediaDevices.getUserMedia({ video: true });

  stream.getTracks()[0].stop();

  const devices = await navigator.mediaDevices.enumerateDevices();

  const kinds = ["audioinput", "videoinput"];

  for (const {kind, deviceId} of devices) {

    assert_in_array(kind, kinds, "camera doesn't expose audiooutput");

    assert_equals(typeof deviceId, "string", "deviceId is a string.");

    switch (kind) {

      case "videoinput":

        assert_greater_than(deviceId.length, 0, "video deviceId should not be empty.");

        break;

      case "audioinput":

        assert_greater_than(deviceId.length, 0, "audio deviceId should not be empty (legacy).");

        break;

}, "mediaDevices.enumerateDevices() is working - after video capture");

// This test is designed to come after its video counterpart directly above

promise_test(async t => {

  const devices1 = await navigator.mediaDevices.enumerateDevices();

  const stream = await navigator.mediaDevices.getUserMedia({ audio: true });

  stream.getTracks()[0].stop();

  const devices = await navigator.mediaDevices.enumerateDevices();

  assert_equals(devices.filter(({kind}) => kind == "videoinput").length,

                devices1.filter(({kind}) => kind == "videoinput").length,

                "same number of (previously exposed) videoinput devices");

  assert_greater_than_equal(devices.filter(d => d.kind == "audioinput").length,

                            devices1.filter(d => d.kind == "audioinput").length,

                            "same number or more audioinput devices");

  const order = ["audioinput", "videoinput", "audiooutput"];

  for (const {kind, deviceId} of devices) {

    assert_in_array(kind, order, "expected kind");

    assert_equals(typeof deviceId, "string", "deviceId is a string.");

    switch (kind) {

      case "videoinput":

        assert_greater_than(deviceId.length, 0, "video deviceId should not be empty.");

        break;

      case "audioinput":

        assert_greater_than(deviceId.length, 0, "audio deviceId should not be empty.");

        break;

  const kinds = devices.map(({kind}) => kind);

  const correct = [...kinds].sort((a, b) => order.indexOf(a) - order.indexOf(b));

  assert_equals(JSON.stringify(kinds), JSON.stringify(correct), "correct order");

}, "mediaDevices.enumerateDevices() is working - after video then audio capture");

promise_test(async () => {

  const devices = await navigator.mediaDevices.enumerateDevices();

  for (const mediaInfo of devices) {

    if (mediaInfo.kind == "audioinput" || mediaInfo.kind == "videoinput") {

      assert_true("InputDeviceInfo" in window, "InputDeviceInfo exists");

      assert_true(mediaInfo instanceof InputDeviceInfo);

    } else if (mediaInfo.kind == "audiooutput") {

      assert_true(mediaInfo instanceof MediaDeviceInfo);

    } else {

      assert_unreached("mediaInfo.kind should be one of 'audioinput', 'videoinput', or 'audiooutput'.")

}, "InputDeviceInfo is supported");

</script>

</body>

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