public void On0Returns1()
{
var mathLib = new FunctionalFactorial();
var result = mathLib.Factorial(0);
Assert.Equal(1, result);
}
public void On13Returns6227020800()
{
var mathLib = new FunctionalFactorial();
var result = mathLib.Factorial(13);
Assert.Equal(6227020800, result);
}
public void On10Returns3628800()
{
var mathLib = new FunctionalFactorial();
var result = mathLib.Factorial(10);
Assert.Equal(3628800, result);
}
public void On3Returns6()
{
var mathLib = new FunctionalFactorial();
var result = mathLib.Factorial(3);
Assert.Equal(6, result);
}
public void One2Returns2()
{
var mathLib = new FunctionalFactorial();
var result = mathLib.Factorial(2);
Assert.Equal(2, result);
}
public IMathLib GetMathLib(FactorialAlgorithm factorialAlgorithm)
{
IFactorialStrategy strategy;
switch (factorialAlgorithm)
{
case FactorialAlgorithm.Functional:
strategy = new FunctionalFactorial();
break;
case FactorialAlgorithm.Recursional:
strategy = new RecursiveFactorial();
break;
default:
throw new NotSupportedException(string.Format(Resources.Err_FactorialAlgorithmNotSupported, factorialAlgorithm));
}
return(new MathLib(strategy));
}
public void OnMinus1ThrowsException()
{
var mathLib = new FunctionalFactorial();
var exception = Assert.Throws <ArgumentException>(() => mathLib.Factorial(-1));
}
