[set-constraints-combinations-microphone.tentative.https.html]
  [Case 0: type='microphone', video=undefined, audio=undefined]
    expected: FAIL

  [Case 1: type='microphone', video=undefined, audio=true]
    expected: FAIL

  [Case 2: type='microphone', video=false, audio=true]
    expected: FAIL

  [Case 3: type='microphone', video=true, audio=true]
    expected: FAIL

  [Case 4: type='microphone', video=undefined, audio=false]
    expected: FAIL

  [Case 5: type='microphone', video=false, audio=false]
    expected: FAIL

  [Case 6: type='microphone', video=true, audio=false]
    expected: FAIL

  [Case 7: type='microphone', video=false, audio=undefined]
    expected: FAIL

  [Case 8: type='microphone', video=true, audio=undefined]
    expected: FAIL