check_radio (wifi) {{{
 initial: off
      wifi on  -> on  (ok)
      wifi off -> off (ok)
 sudo wifi on  -> on  (ok)
 sudo wifi off -> off (ok)
 result: off
}}} errcnt=0

check_radio (bluetooth) {{{
 initial: off
      bluetooth on  -> on  (ok)
      bluetooth off -> off (ok)
 sudo bluetooth on  -> on  (ok)
 sudo bluetooth off -> off (ok)
 result: off
}}} errcnt=0

check_radio (wwan) {{{
 no device.
}}} errcnt=0

check_radio (nfc) {{{
 no device.
}}} errcnt=0

OK: 4 of 4 tests passed