public void ChangeSpriteColor()
        {
            var stream = new Subject<PointerState>();
            var tested = new PointerDrawer(stream);
            stream.OnNext(new PointerState { Position = new GeoPoint { X = 0, Y = 0 } });

            //tested.
        }
        public void ChangeSpriteColor()
        {
            var stream = new Subject <PointerState>();
            var tested = new PointerDrawer(stream);

            stream.OnNext(new PointerState {
                Position = new GeoPoint {
                    X = 0, Y = 0
                }
            });

            //tested.
        }