SVG 1.1 dynamic update tests
Erode radius = 4
Tests dynamic updates of the 'in' attribute of the SVGFEMorphologyElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS morphologyElement.getAttribute('in') is "SourceAlpha"
PASS morphologyElement.getAttribute('in') is "SourceGraphic"
PASS successfullyParsed is true
TEST COMPLETE