/// <summary>
/// Entry point for program.
/// This method will take argument from user and call another method to calculate factorial of the given number.
/// </summary>
static void Main()
{
try
{
// Flag used to continue program execution based on the user inputs
bool flag = true;
while (flag)
{
Console.WriteLine(InputMessage);
string number = Console.ReadLine();
Factorial objFactorial = new Factorial();
string result = objFactorial.CalculateFactorial(number);
Console.WriteLine(string.Format("{0}{1}{2}{3}", FactorialMessage, number, Is, result));
Console.WriteLine(DisplayMessageOne);
Console.WriteLine(DisplayMessageTwo);
if (Yes != Console.ReadLine())
{
flag = false;
}
}
}
catch (Exception exception)
{
Console.WriteLine(string.Format("{0}{1}", Error, exception.Message));
Console.ReadLine();
}
}
public void FactorialOfNegativeNumberTest()
{
Factorial objFactorial = new Factorial();
string actual = objFactorial.CalculateFactorial(NegativeNumber);
Assert.AreEqual(InvalidNumberMessage, actual);
}
public void FactorialOfHundred()
{
Factorial objFactorial = new Factorial();
string actual = objFactorial.CalculateFactorial(Hundred);
Assert.AreEqual(FactOfHundred, actual);
}
public void FactorialOfFive()
{
Factorial objFactorial = new Factorial();
string actual = objFactorial.CalculateFactorial(FiveNumber);
Assert.AreEqual(FactOfFive, actual);
}
public void FactorialOfEmptyNumberTest()
{
Factorial objFactorial = new Factorial();
string actual = objFactorial.CalculateFactorial(string.Empty);
Assert.AreEqual(EmptyStringMessage, actual);
}
public void FactorialOfZero()
{
Factorial objFactorial = new Factorial();
string actual = objFactorial.CalculateFactorial(ZeroNumber);
Assert.AreEqual(OneNumber, actual);
}