[gap-computed.html]
  [Property gap value 'normal']
    expected: FAIL

  [Property gap value '10px']
    expected: FAIL

  [Property gap value '20%']
    expected: FAIL

  [Property gap value 'calc(20% + 10px)']
    expected: FAIL

  [Property gap value 'calc(-0.5em + 10px)']
    expected: FAIL

  [Property gap value 'calc(0.5em + 10px)']
    expected: FAIL

  [Property gap value 'normal 10px']
    expected: FAIL

  [Property gap value '10px 20%']
    expected: FAIL

  [Property gap value '20% calc(20% + 10px)']
    expected: FAIL

  [Property gap value 'calc(20% + 10px) normal']
    expected: FAIL

  [Property gap value 'calc(-0.5em + 10px) calc(0.5em + 10px)']
    expected: FAIL