SVG 1.1 dynamic update tests
Tests dynamic updates of the 'in' attribute of the SVGFEGaussianBlurElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS blurElement.getAttribute('in') is "SourceAlpha"
PASS blurElement.getAttribute('in') is "SourceGraphic"
PASS successfullyParsed is true
TEST COMPLETE