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=used-fallback
			DIV	 id=B


Moving mouse from A/used-fallback to A

  mouseout
     @used-fallback (target: used-fallback) (related: A)
     @content1 (target: used-fallback) (related: A)
     @shadow-root (target: used-fallback) (related: A)

  mouseover

Moving mouse from A to A/used-fallback

  mouseout

  mouseover
     @used-fallback (target: used-fallback) (related: A)
     @content1 (target: used-fallback) (related: A)
     @shadow-root (target: used-fallback) (related: A)

Click non-used-fallback node

  click
     @non-used-fallback (target: non-used-fallback)
     @content2 (target: non-used-fallback)
     @shadow-root (target: non-used-fallback)
     @A (target: A)
     @top (target: A)
PASS successfullyParsed is true

TEST COMPLETE