<!doctype html>
<title>MediaStreamTrack GetSettings</title>
<p class="instructions">When prompted, accept to share your video stream.</p>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
  'use strict'

  // https://w3c.github.io/mediacapture-main/archives/20170605/getusermedia.html

  promise_test(t => {
    const constraints = {
      video: true,
      audio: false
    };

    return navigator.mediaDevices.getUserMedia(constraints)
    .then(mediaStream => {
      const settings1 = mediaStream.getVideoTracks()[0].getSettings();
      const videoConstraints = {
        deviceId: settings1.deviceId
      };

      return navigator.mediaDevices.getUserMedia({
        video: videoConstraints,
        audio: false
      }).then(mediaStream => {
        const settings2 = mediaStream.getVideoTracks()[0].getSettings();
        assert_equals(settings1.deviceId, settings2.deviceId);
      });
    });
  }, 'A device can be opened twice and have the same device ID');

  promise_test(t => {
    const constraints = {
      video: true,
      audio: false
    };

    return navigator.mediaDevices.getUserMedia(constraints)
    .then(mediaStream => {
      const settings1 = mediaStream.getVideoTracks()[0].getSettings();
      const videoConstraints = {
        deviceId: settings1.deviceId,
        width: {
          exact: settings1.width / 2
        }
      };

      return navigator.mediaDevices.getUserMedia({
        video: videoConstraints,
        audio: false
      }).then(mediaStream => {
        const settings2 = mediaStream.getVideoTracks()[0].getSettings();
        assert_equals(settings1.deviceId, settings2.deviceId);
        assert_equals(settings1.width / 2, settings2.width);
      });
    });
  }, 'A device can be opened twice with different resolutions');
</script>