public void WhenFactorialArgumentsIsValid_ShouldCorrectCount(int factorialNumber, long factorialResult)
{
var mathem = new Mathem();
var result = mathem.Factorial(factorialNumber);
Assert.AreEqual(factorialResult, result);
}
public void WhenAFactorialArgumentIsInvalid_ShouldShowException()
{
int test = -14;
var mathem = new Mathem();
Assert.Throws <ArgumentException>(() => {
var result = mathem.Factorial(test);
});
}
