public void TestFactorialBigIntegerEqualsFactorialInt()
{
for (int n = 0; n < 10; n++)
{
// act
int factorial0 = BigIntegerMathLib.Factorial0(n);
BigInteger factorial1 = BigIntegerMathLib.Factorial1(n);
// assert
Assert.AreEqual((BigInteger)factorial0, factorial1);
Assert.AreEqual(factorial0, (int)factorial1);
}
}
public void TestFactorial0OfNegativeNumberThrowsArgumentException()
{
// assert
Assert.That(() => BigIntegerMathLib.Factorial0(-1), Throws.TypeOf <ArgumentException>());
}
