SVG 1.1 dynamic update tests
Tests dynamic updates of the 'specularExponent' attribute of the SVGFESpotLightElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS spotLightElement.getAttribute('specularExponent') is "20"
PASS spotLightElement.getAttribute('specularExponent') is "1"
PASS successfullyParsed is true
TEST COMPLETE