public void CalcFactorial_IsInputplus_ReturnAnswer()
{
var method = new MethodFac();
int result = method.CalcFactorial(5);
Assert.AreEqual(result, 120);
}
public void CalcFactorial_IsInputMinus_ReturnOne()
{
var method = new MethodFac();
int result = method.CalcFactorial(-1);
Assert.AreEqual(result, 0);
}