[tab-size-valid.html]
  [e.style['tab-size'\] = "0" should set the property value]
    expected: FAIL

  [e.style['tab-size'\] = "2.5" should set the property value]
    expected: FAIL

  [e.style['tab-size'\] = "0px" should set the property value]
    expected: FAIL

  [e.style['tab-size'\] = "10px" should set the property value]
    expected: FAIL

  [e.style['tab-size'\] = "calc(2em + 3ex)" should set the property value]
    expected: FAIL