mozilla-release/dom/media/tests/mochitest/test_peerConnection_offerRequiresReceiveVideo.html

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<head>
  <script type="application/javascript" src="pc.js"></script>
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<pre id="test">
<script type="application/javascript">
  createHTML({
    bug: "850275",
    title: "Simple offer media constraint test with video"
  });

  runNetworkTest(function() {
    var test = new PeerConnectionTest();
    test.setMediaConstraints([], [{video: true}]);
    test.setOfferOptions({ offerToReceiveVideo: true });
    test.run();
  });
</script>
</pre>
</body>
</html>