@Test
    public void threeFeetIsEqualToOneYard(){
        ArithmeticQuantity feet = new ArithmeticQuantity(3, Distance.FEET);
        ArithmeticQuantity yards = new ArithmeticQuantity(1, Distance.YARDS);

        assertEquals(feet, yards);
        assertEquals(yards, feet);

        //assertEquals(new Quantity(1.5, YARDS), new Quantity(4.5, FEET));
    }