Tests to ensure that event dispatching behaves as the Shadow DOM spec describes.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


Composed Shadow Tree will be:
DIV	 id=sandbox
	DIV	 id=top
		DIV	 id=shadow-host
			svg	 id=svg-in-shadow-tree class=[object SVGAnimatedString]


Moving mouse from shadow-host/svg-in-shadow-tree to top

  mouseout

  mouseover
PASS successfullyParsed is true

TEST COMPLETE