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https://github.com/web-platform-tests/wpt
26 December 2018, 22:31:15 UTC
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Tip revision: e15d2c1a2afc866b09d31558d1af451227be2dca authored by Raymond Toy on 20 September 2018, 21:42:05 UTC
Sub-sample accurate start for ABSN
Tip revision: e15d2c1
MediaDevices-enumerateDevices.https.html 
<!doctype html>
<html>
<head>
<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.'/>
</head>
<body>
<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(function() {
  assert_true(undefined !== navigator.mediaDevices.enumerateDevices, "navigator.mediaDevices.enumerateDevices exists");
  return navigator.mediaDevices.enumerateDevices().then(function(list) {
    for (let mediainfo of list) {
      assert_true(undefined !== mediainfo.deviceId, "mediaInfo's deviceId should exist.");
      assert_true(undefined !== mediainfo.kind,     "mediaInfo's kind     should exist.");
      assert_true(undefined !== mediainfo.label,    "mediaInfo's label    should exist.");
      assert_true(undefined !== mediainfo.groupId,  "mediaInfo's groupId  should exist.");
      // TODO the values of some of those fields should be empty string by default if no permission has been requested.
      if ( mediainfo.kind == "audioinput" || mediainfo.kind == "videoinput") {
        assert_true(mediainfo instanceof InputDeviceInfo);
        var capabilities = mediainfo.getCapabilities();
        assert_equals(typeof capabilities, "object", "capabilities must be an object.");
        assert_equals(typeof capabilities.deviceId, "string", "deviceId must be a string.");
        assert_equals(typeof capabilities.groupId, "string", "groupId must be a string.");
        if (mediainfo.kind == "audioinput") {
          assert_equals(typeof capabilities.echoCancellation, "object", "echoCancellation must be an object.");
          assert_equals(typeof capabilities.autoGainControl, "object", "autoGainControl must be an object.");
          assert_equals(typeof capabilities.noiseSuppression, "object", "noiseSuppression must be an object.");
        }
        if (mediainfo.kind == "videoinput") {
          assert_equals(typeof capabilities.facingMode, "object", "facingMode must be an object.");
          verifyVideoRangeProperties(capabilities);
        }
      } else if ( mediainfo.kind == "audiooutput" ) {
        assert_true(mediainfo instanceof MediaDeviceInfo);
      } else {
        assert_unreached("mediainfo.kind should be one of 'audioinput', 'videoinput', or 'audiooutput'.")
      }
    }
  });
}, "mediaDevices.enumerateDevices() is present and working on navigator");

function verifyVideoRangeProperties(capabilities) {
  if (capabilities.hasOwnProperty('width')) {
      assert_equals(Object.keys(capabilities.width).length, 2);
      assert_true(capabilities.width.hasOwnProperty('min'));
      assert_true(capabilities.width.hasOwnProperty('max'));
      assert_less_than_equal(capabilities.width.min, capabilities.width.max);
  }
  if (capabilities.hasOwnProperty('height')) {
    assert_equals(Object.keys(capabilities.height).length, 2);
    assert_true(capabilities.height.hasOwnProperty('min'));
    assert_true(capabilities.height.hasOwnProperty('max'));
    assert_less_than_equal(capabilities.height.min, capabilities.height.max);
  }
  if (capabilities.hasOwnProperty('aspectRatio')) {
    assert_equals(Object.keys(capabilities.aspectRatio).length, 2);
    assert_true(capabilities.aspectRatio.hasOwnProperty('min'));
    assert_true(capabilities.aspectRatio.hasOwnProperty('max'));
    assert_less_than_equal(capabilities.aspectRatio.min, capabilities.aspectRatio.max);
  }
  if (capabilities.hasOwnProperty('frameRate')) {
    assert_equals(Object.keys(capabilities.frameRate).length, 2);
    assert_true(capabilities.frameRate.hasOwnProperty('min'));
    assert_true(capabilities.frameRate.hasOwnProperty('max'));
    assert_less_than_equal(capabilities.frameRate.min, capabilities.frameRate.max);
  }
}
</script>
</body>
</html>
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