[offset-position-parsing-invalid.html]
  [e.style['offset-position'\] = "none" should not set the property value]
    expected: FAIL

  [e.style['offset-position'\] = "30deg" should not set the property value]
    expected: FAIL

  [e.style['offset-position'\] = "left 10% top" should not set the property value]
    expected: FAIL