[columns-valid.html]
  [e.style['columns'\] = "10px 2 / 100px" should set the property value]
    expected: FAIL

  [e.style['columns'\] = "2 10px / 100px" should set the property value]
    expected: FAIL

  [e.style['columns'\] = "10px / 100px" should set the property value]
    expected: FAIL

  [e.style['columns'\] = "auto / 100px" should set the property value]
    expected: FAIL

  [e.style['columns'\] = "10px 2 / auto" should set the property value]
    expected: FAIL

  [e.style['columns'\] = "2 10px / auto" should set the property value]
    expected: FAIL

  [e.style['columns'\] = "10px / auto" should set the property value]
    expected: FAIL

  [e.style['columns'\] = "2 / auto" should set the property value]
    expected: FAIL

  [e.style['columns'\] = "auto / auto" should set the property value]
    expected: FAIL