Testing DOMRect:
1. {"x":0,"y":0,"width":0,"height":0,"top":0,"right":0,"bottom":0,"left":0}
2. {"x":10,"y":20,"width":30,"height":40,"top":20,"right":40,"bottom":60,"left":10}
3. {"x":-10,"y":-20,"width":30,"height":40,"top":-20,"right":20,"bottom":20,"left":-10}
4. {"x":10,"y":20,"width":30,"height":40,"top":20,"right":40,"bottom":60,"left":10}
5. {"x":null,"y":20,"width":30,"height":40,"top":20,"right":null,"bottom":60,"left":null}
6. {"x":10,"y":null,"width":30,"height":40,"top":null,"right":40,"bottom":null,"left":10}
7. {"x":10,"y":20,"width":null,"height":40,"top":20,"right":null,"bottom":60,"left":null}
8. {"x":10,"y":20,"width":30,"height":null,"top":null,"right":40,"bottom":null,"left":10}
9. {"x":null,"y":20,"width":30,"height":40,"top":20,"right":null,"bottom":60,"left":null}
10. {"x":10,"y":null,"width":30,"height":40,"top":null,"right":40,"bottom":null,"left":10}
11. {"x":10,"y":20,"width":null,"height":40,"top":20,"right":null,"bottom":60,"left":10}
12. {"x":10,"y":20,"width":30,"height":null,"top":20,"right":40,"bottom":null,"left":10}
Testing DOMRectReadOnly:
1. {"x":0,"y":0,"width":0,"height":0,"top":0,"right":0,"bottom":0,"left":0}
2. {"x":10,"y":20,"width":30,"height":40,"top":20,"right":40,"bottom":60,"left":10}
3. {"x":-10,"y":-20,"width":30,"height":40,"top":-20,"right":20,"bottom":20,"left":-10}
4. {"x":10,"y":20,"width":30,"height":40,"top":20,"right":40,"bottom":60,"left":10}
5. {"x":null,"y":20,"width":30,"height":40,"top":20,"right":null,"bottom":60,"left":null}
6. {"x":10,"y":null,"width":30,"height":40,"top":null,"right":40,"bottom":null,"left":10}
7. {"x":10,"y":20,"width":null,"height":40,"top":20,"right":null,"bottom":60,"left":null}
8. {"x":10,"y":20,"width":30,"height":null,"top":null,"right":40,"bottom":null,"left":10}
9. {"x":null,"y":20,"width":30,"height":40,"top":20,"right":null,"bottom":60,"left":null}
10. {"x":10,"y":null,"width":30,"height":40,"top":null,"right":40,"bottom":null,"left":10}
11. {"x":10,"y":20,"width":null,"height":40,"top":20,"right":null,"bottom":60,"left":10}
12. {"x":10,"y":20,"width":30,"height":null,"top":20,"right":40,"bottom":null,"left":10}