[RTCRtpTransceiver-setCodecPreferences.html]
  [setCodecPreferences() can remove rtx]
    expected: FAIL

  [setCodecPreferences() modifies the order of video codecs in createOffer]
    expected:
      if (os == "mac") and not debug: [PASS, FAIL]

  [setCodecPreferences() should allow setting H264 as first codec]
    expected:
      if (os == "mac") and not debug: [PASS, FAIL]