public void TestFactorialOfOneIsOne()
{
// act
BigInteger result1 = BigIntegerMathLib.Factorial1(1);
BigInteger result2 = BigIntegerMathLib.Factorial2(1);
// assert
BigInteger one = 1;
Assert.AreEqual(one, result1);
Assert.AreEqual(one, result2);
}
public void TestBothVersionsOfFactorialAreEqual()
{
for (BigInteger n = 0; n < 100; n++)
{
// act
BigInteger factorial1 = BigIntegerMathLib.Factorial1(n);
BigInteger factorial2 = BigIntegerMathLib.Factorial2(n);
// assert
Assert.AreEqual(factorial1, factorial2);
}
}
static void Main()
{
BigInteger factorial1000 = BigIntegerMathLib.Factorial2(1000);
BigInteger fibonacci1000 = BigIntegerMathLib.Fibonacci2(1000);
string message1 = string.Format("\nFactorial(1000) = \n{0}", factorial1000);
Console.WriteLine(message1);
string message2 = string.Format("\nFibonacci(1000) = \n{0}", fibonacci1000);
Console.WriteLine(message2);
const string file = "FactorialAndFibonacci.txt";
string contents = string.Format("{0}{1}", message1, message2);
File.WriteAllText(file, contents);
Console.ReadKey();
}
public void TestFactorial2OfNegativeNumberThrowsArgumentException()
{
// assert
Assert.That(() => BigIntegerMathLib.Factorial2(-1), Throws.TypeOf <ArgumentException>());
}
