SVG 1.1 dynamic update tests
Tests dynamic updates of the 'diffuseConstant' attribute of the SVGFEDiffuseLightingElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS gradientElement.getAttribute('diffuseConstant') is "0"
PASS gradientElement.getAttribute('diffuseConstant') is "1"
PASS successfullyParsed is true
TEST COMPLETE