[font-weight-sign-function.html]
  [Property font-weight value 'calc(sign(1rem - 1px) * 10)']
    expected: FAIL

  [Property font-weight value 'calc(sign(1rem - 1px) * -10000)']
    expected: FAIL

  [Property font-weight value 'calc(sign(1rem - 1px) * 10000)']
    expected: FAIL