public void TestNegativeNumbers()
{
Assert.Throws <Exception>(delegate
{
defaultParser.CalculateExpression(Regex.Unescape("5\n-2\n3"));
}, "invalid negative numbers -2\n");
}
static void Main(string[] args)
{
Console.WriteLine("challenge-calulator");
Console.WriteLine("Author: Ali Shemirani");
Console.WriteLine("Description: application receives formula based on rules defined https://github.com/restaurant365/challenge-calculator" +
Environment.NewLine + "and cacluate the result. it also receives accepts below arguments that must be separated with a space. you can mix and match every combination of available arguments" + Environment.NewLine);
Console.WriteLine("--max={number} specifiy the maximum allowed number in formulas if it goes over the value specified it converts to 0, default value is 1000");
Console.WriteLine("--delimiter={character} specify an alternative delimiter in formulas it is one character, default value is \\n");
Console.WriteLine("--negative={true/false} specify whether application should process negative values, default value is false");
Console.WriteLine("--operation={Add/Multiplication/Division/Substrac} select what operation should be performed for formula, default operation is Add");
Console.WriteLine(Environment.NewLine);
Console.WriteLine("Examples:");
Console.WriteLine("-----------------------------------");
Console.WriteLine("2,3,4,5 --max=4 --operation=Multiplication");
Console.WriteLine("The result is 0" + Environment.NewLine);
string input = Regex.Unescape(Console.ReadLine());
while (!string.IsNullOrEmpty(input))
{
ParserBuilder parserBuilder = new ParserBuilder();
string[] argumentParts = input.Split(" ");
for (int index = 1; index < argumentParts.Length; index++)
{
string argument = argumentParts[index];
if (argument.StartsWith("--max=", StringComparison.Ordinal))
{
int maxValue = int.Parse(argument.Substring("--max=".Length));
parserBuilder.SetMaxValue(maxValue);
}
else if (argument.StartsWith("--delimiter=", StringComparison.Ordinal))
{
char delimiter = Regex.Unescape(argument.Substring("--delimiter=".Length))[0];
parserBuilder.SetCustomDelimiter(delimiter);
}
else if (argument.StartsWith("--negative=", StringComparison.Ordinal))
{
bool parseNegative = bool.Parse(argument.Substring("--negative=".Length));
parserBuilder.SetParseNegative(parseNegative);
}
else if (argument.StartsWith("--operation=", StringComparison.Ordinal))
{
Operation operation = (Operation)Enum.Parse(typeof(Operation), argument.Substring("--operation=".Length));
parserBuilder.SetOperation(operation);
}
}
if (argumentParts.Length >= 1)
{
string expression = argumentParts[0];
IParser parser = parserBuilder.Build(expression);
int result = parser.CalculateExpression(expression);
Console.WriteLine($"The result is: {result}");
}
input = Regex.Unescape(Console.ReadLine());
}
}
public void TestMultiDelimiter()
{
int result = parser.CalculateExpression(Regex.Unescape("1\n2,3"));
Assert.AreEqual(6, result);
}
public void TestValidExpressionWithDelimiter()
{
int result = parser.CalculateExpression("2,2");
Assert.AreEqual(4, result);
}