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=A
			DIV	 id=B
				DIV	 id=G
					DIV	 id=J
						DIV	 id=C
							DIV	 id=D
					DIV	 id=L
						DIV	 id=E
							DIV	 id=F


Moving mouse from F to D

  mouseout

  mouseover

Moving mouse from B/G/L to D

  mouseout

  mouseover

Moving mouse from B/G/L to B/G/J

  mouseout

  mouseover

Moving mouse from A to D

  mouseout

  mouseover

Moving mouse from D to A

  mouseout

  mouseover
PASS successfullyParsed is true

TEST COMPLETE