SVG 1.1 dynamic update tests
Tests dynamic updates of the 'filterUnits' attribute of the SVGFilterElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS filterElement.getAttribute('filterUnits') is "userSpaceOnUse"
PASS filterElement.getAttribute('filterUnits') is "objectBoundingBox"
PASS successfullyParsed is true
TEST COMPLETE