public void ToStringTest()
        {
            var oSingleCountLineItem = new LineItem(SINGLE_COUNT_LINE_ITEM_AS_INPUT_STRING);
            Assert.AreEqual("1 imported box of chocolates : 11.40", oSingleCountLineItem.ToString());

            var oMultiCountLineItem = new LineItem(MULTIPLE_COUNT_LINE_ITEM_AS_INPUT_STRING);
            Assert.AreEqual("14 imported box of chocolates : 159.50", oMultiCountLineItem.ToString());
        }