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<title>enumerateDevices: test that enumerateDevices is present</title>
<link rel="author" title="Dr Alex Gouaillard" href="mailto:agouaillard@gmail.com"/>
<link rel="help" href="https://w3c.github.io/mediacapture-main/#enumerating-devices">
<meta name='assert' content='Check that the enumerateDevices() method is present.'/>
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<h1 class="instructions">Description</h1>
<p class="instructions">This test checks for the presence 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>
"use strict";

//NOTE ALEX: for completion, a test for ondevicechange event is missing.

promise_test(async () => {
  assert_not_equals(navigator.mediaDevices.enumerateDevices, undefined, "navigator.mediaDevices.enumerateDevices exists");
  const deviceList =  await navigator.mediaDevices.enumerateDevices();
  for (const mediaInfo of deviceList) {
    assert_not_equals(mediaInfo.kind, undefined, "mediaInfo's kind should exist.");
    assert_equals(mediaInfo.deviceId, "", "mediaInfo's deviceId should exist and be empty if getUserMedia was never called successfully.");
    assert_equals(mediaInfo.label, "", "mediaInfo's label should exist and be empty if getUserMedia was never called successfully.");
    assert_equals(mediaInfo.groupId, "", "mediaInfo's groupId  should exist and be empty if getUserMedia was never called successfully.");
    assert_in_array(mediaInfo.kind, ["videoinput", "audioinput", "audiooutput"]);
  }
  assert_less_than_equal(deviceList.filter((item) => { return item.kind == "audioinput"; }).length, 1, "there should be zero or one audio input device ");
  assert_less_than_equal(deviceList.filter((item) => { return item.kind == "videoinput"; }).length, 1, "there should be zero or one video input device ");

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

promise_test(async () => {
  await navigator.mediaDevices.getUserMedia({ audio : true });
  const deviceList =  await navigator.mediaDevices.enumerateDevices();
  for (const mediaInfo of deviceList) {
    assert_not_equals(mediaInfo.kind, undefined, "mediaInfo's kind should exist.");
    assert_not_equals(mediaInfo.deviceId, "", "mediaInfo's deviceId should exist and not be empty.");
    assert_in_array(mediaInfo.kind, ["videoinput", "audioinput", "audiooutput"]);
  }
}, "mediaDevices.enumerateDevices() is present and working - after capture");

promise_test(async () => {
  const deviceList =  await navigator.mediaDevices.enumerateDevices();
  for (const mediaInfo of deviceList) {
    if (mediaInfo.kind == "audioinput" || mediaInfo.kind == "videoinput") {
      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");
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