public void SumOfDigits()
{
var number = BigInteger.Pow(2, 1000).ToString();
var sum = NumberHelpers.GetSumOfDigits(number);
Assert.AreEqual(1366, sum);
}
public void GetSumOfDigitsTest2()
{
var number = "1234";
var sum = NumberHelpers.GetSumOfDigits(number);
Assert.AreEqual(10, sum);
}
public void MainTest()
{
BigInteger a = 1;
for (var i = 2; i <= 100; i++)
{
a = BigInteger.Multiply(a, i);
}
Assert.AreEqual(648, NumberHelpers.GetSumOfDigits(a.ToString()));
}