@Test
    public void findBestDistance(){

        List<ArithmeticQuantity> quantity_list = new ArrayList<ArithmeticQuantity>();
        quantity_list.add(new ArithmeticQuantity(10, Distance.FEET));
        quantity_list.add(new ArithmeticQuantity(2, Distance.YARDS));
        quantity_list.add(new ArithmeticQuantity(9, Distance.FEET));
        quantity_list.add(new ArithmeticQuantity(4, Distance.YARDS));
        assertEquals(Quantity.best(quantity_list), new ArithmeticQuantity(4, Distance.YARDS));

    }