@Test
	public void getSprites(){
		World w = new World(null);
		Sprite e = EnemyFactory.createEasyEnemy(new Position(1,1));
		Sprite p = new Player(1,1);
		
		w.addSprite(p);
		w.addSprite(e);
		
		assertTrue(w.getSprites().size() == 2 && w.getSprites().contains(p) 
			&& w.getSprites().contains(e));
	}