SVG 1.1 dynamic update tests
Tests dynamic updates of the 'xChannelSelector' property of the SVGFEDisplacementMapElement object
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS displacementMap.xChannelSelector.baseVal is SVGFEDisplacementMapElement.SVG_CHANNEL_B
PASS displacementMap.xChannelSelector.baseVal is SVGFEDisplacementMapElement.SVG_CHANNEL_R
PASS successfullyParsed is true
TEST COMPLETE