SVG 1.1 dynamic update tests
Tests dynamic updates of the 'in' attribute of the SVGFECompositeElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS overComposite1.getAttribute('in') is "F12"
PASS overComposite1.getAttribute('in') is "F1"
PASS successfullyParsed is true
TEST COMPLETE