[RTCPeerConnection-addTransceiver.https.html]
  [addTransceiver() with rid longer than 16 characters should throw TypeError]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1396918 (Not seeing any spec language about length...)

  [addTransceiver() with rid containing invalid non-alphanumeric characters should throw TypeError]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1396918

