public void CalculateCombinationsRecursive_GetNumberOfCoins()
        {
            //Arrange
            int amount             = 50;
            CoinCombinations coins = new CoinCombinations();
            int quarters           = 2;

            //Act
            coins.CalculateCombinationsRecursive(amount);
            int quartersCount = coins.GetQuarters();

            //Assert
            Assert.AreEqual(quarters, quartersCount);
        }