SVG 1.1 dynamic update tests
Tests dynamic updates of the 'z' property of the SVGFESpotLightElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS spotLightElement.z.baseVal is 0
PASS spotLightElement.z.baseVal is 100
PASS successfullyParsed is true
TEST COMPLETE