public void FailsWhithTextValue()
{
long result = Week4.FactorialNumber("pepe");
}
public void WorksForPositiveNumbers()
{
long result = Week4.FactorialNumber("4");
Assert.AreEqual(24, result);
}
public void FailsWhithTextValueOrValueLessOrEqualsZero()
{
long result = Week4.FactorialNumber("-6");
}
