public void MoveToValidDirection()
		{
			var field = new Field();
			var positionY = field.Position.Y;
			var moveableField = new MoveableField(field);
			moveableField.Move(Direction.Down);
			Assert.AreEqual(positionY - 1, field.Position.Y);
		}
		public void MoveToInvalidDirection()
		{
			var field = new Field();
			var moveableField = new MoveableField(field);
			moveableField.Move((Direction)9);
		}