public void CalculateCoins_AddAPenny_True()
        {
            //arrange

            //act
            CoinCal.CalculateCoins(4);

            //assert
            Assert.AreEqual(4, CoinCal.GetPennies());
        }
        public void CalculateCoins_AddADime_True()
        {
            //arrange

            //act
            CoinCal.CalculateCoins(10);

            //assert
            Assert.AreEqual(1, CoinCal.GetDimes());
        }
        public void CalculateCoins_AddANickel_True()
        {
            //arrange

            //act
            CoinCal.CalculateCoins(5);

            //assert
            Assert.AreEqual(1, CoinCal.GetNickels());
        }
        public void CalculateCoins_AddAQuarter_True()
        {
            //arrange

            //act
            CoinCal.CalculateCoins(55);

            //assert
            Assert.AreEqual(2, CoinCal.GetQuarters());
        }
        public void CalculateCoins_AddCoins_True()
        {
            //arrange

            //act
            CoinCal.CalculateCoins(37);

            //assert
            Assert.AreEqual(1, CoinCal.GetQuarters());
            Assert.AreEqual(1, CoinCal.GetDimes());
            Assert.AreEqual(2, CoinCal.GetPennies());
        }