[clamp-length-serialize.html]
  [e.style['letter-spacing'\] = "calc(0px - clamp(30px, 100px, 20px))" should set the property value]
    expected: FAIL

  [e.style['letter-spacing'\] = "calc(calc(0px - clamp(30px, 100px, 20px)))" should set the property value]
    expected: FAIL

  [e.style['letter-spacing'\] = "calc(0px - clamp(1px, 1em, 1vh))" should set the property value]
    expected: FAIL

  [e.style['letter-spacing'\] = "calc(calc(0px - clamp(1px, 1em, 1vh)))" should set the property value]
    expected: FAIL