mediacapture-streams/GUM-trivial-constraint.https.html

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<title>Trivial mandatory constraint in getUserMedia</title>
<link rel="author" title="Dominique Hazael-Massieux" href="mailto:dom@w3.org"/>
<link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#widl-NavigatorUserMedia-getUserMedia-void-MediaStreamConstraints-constraints-NavigatorUserMediaSuccessCallback-successCallback-NavigatorUserMediaErrorCallback-errorCallback">
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<p class="instructions">When prompted, accept to share your video stream.</p>
<h1 class="instructions">Description</h1>
<p class="instructions">This test checks that setting a trivial mandatory
constraint (width &gt;=0) in getUserMedia works</p>

<div id='log'></div>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
var t = async_test("Tests that setting a trivial mandatory constraint in getUserMedia works");
t.step(function() {
  navigator.mediaDevices.getUserMedia({video: {width: {min:0}}})
    .then(t.step_func(function (stream) {
      assert_equals(stream.getVideoTracks().length, 1, "the media stream has exactly one video track");
      t.done();
    }), t.step_func(function(error) {
      assert_unreached("a Video stream of minimally zero width can always be created");
      t.done();
    }));
});
</script>
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