/// <summary>
/// Calculate the aggregation of numbers in a delimited string based on console arguments and input
/// </summary>
/// <param name="userInput">numbers and delimiters in a delimited format</param>
/// <param name="args">applpication arguments</param>
/// <returns>A result of the calculation based on the configuration</returns>
public CalculatorResult Calculate(string userInput, string[] args)
{
CalculatorResult calculatorResult = new CalculatorResult();
try
{
ProgramArguments programArguments = programArgumentsHandler.InterpretProgramArguments(args);
if (programArguments.AlternateDelimiter.Length > 0)
{
calculatorInputHandler.ReplaceAlternativeDelimiterWithArgumentDelimiter(programArguments.AlternateDelimiter);
}
if (programArguments.UpperBoundExists)
{
calculatorInputHandler.UpperBound = programArguments.UpperBound;
}
CalculatorInput calculatorInput = calculatorInputHandler.InterpretCalculatorInput(userInput);
if (!programArguments.AllowNegativeNumbers && calculatorInput.Numbers.Any(x => x < 0))
{
throw new NegativeNumberException("Negative numbers are not allowed: " + string.Join(",", calculatorInput.Numbers.Where(x => x < 0)));
}
try
{
calculatorResult = calculator.Calculate(calculatorInput.Numbers, Calculator.CreateCalculator(programArguments.CalculatorType));
}
catch (DivideByZeroException ex)
{
calculatorResult.ErrorMessage = $"{ex.Message}";
}
catch (Exception ex)
{
calculatorResult.ErrorMessage = $"Encountered an Error Attempting to Run Calculation: {ex.ToString()}";
}
}
catch (MaxNumbersExceededException ex)
{
calculatorResult.ErrorMessage = $"{ex.Message}";
}
catch (NegativeNumberException ex)
{
calculatorResult.ErrorMessage = $"{ex.Message}";
}
catch (Exception ex)
{
calculatorResult.ErrorMessage = $"Encountered an Error Attempting to Intepret the Calculator Input: {ex.ToString()}";
}
return(calculatorResult);
}
public void Calculate_NoNumbers_SuccessfulResult()
{
string[] args = null;
string userInput = "";
calculatorInputHandler.InterpretCalculatorInput(Arg.Any <string>()).Returns(
new CalculatorInput {
Numbers = new List <int>()
{
}
}
);
programArgumentsHandler.InterpretProgramArguments(Arg.Any <string[]>()).Returns(new ProgramArguments());
CalculatorHandler calculatorHandler = new CalculatorHandler(calculatorInputHandler, programArgumentsHandler);
CalculatorResult calculatorResult = calculatorHandler.Calculate(userInput, args);
Assert.IsTrue(calculatorResult.Total == 0);
Assert.IsTrue(calculatorResult.Formula.Equals("0 = 0"));
Assert.IsTrue(calculatorResult.ErrorMessage.Length == 0);
}
