
PASS e.style['letter-spacing'] = "auto" should not set the property value 
PASS e.style['letter-spacing'] = "20" should not set the property value 
PASS e.style['letter-spacing'] = "30%" should not set the property value 
PASS e.style['letter-spacing'] = "calc(40% + 50px)" should not set the property value 
PASS e.style['letter-spacing'] = "normal 10px" should not set the property value