public void ProcessNumbers_Should_Display_Output()
{
var fizzBuzz = new RulesEngine();
var output = fizzBuzz.ProcessRange();
foreach (var item in output)
{
Console.WriteLine(item);
}
}
/// <summary>
/// Use the rules engine to process a range from 0 to 100 using the default rules and
/// 2 custom rules and associated strings:
/// - Custom Rule 1: if the number equals 4, display "FOUR"
/// - Custom Rule 2: if the number is > 50 and a multiple of 6, display "GREATER_THAN_FIFTY_AND_MULTIPLE_OF_6"
/// </summary>
static void Main(string[] args)
{
var fizzBuzz = new RulesEngine();
int upperBound;
//Define custom rules to pass to rules engine
var rules = new Dictionary<NumberRule, string>()
{
{x => x == 4, "FOUR"},
{x => x > 50 && x%6 == 0, "GREATER_THAN_FIFTY_AND_MULTIPLE_OF_6"}
};
if (args.Length == 0)
{
//Process the range, storing the results in a collection
var result = fizzBuzz.ProcessRange(rules);
//Iterate over the results collection, writing the results for each
//number in the range to the console
foreach (var item in result)
{
var number = item.Key;
var output = item.Value;
Console.WriteLine("{0}: {1}", number, output);
}
}
else if (args.Length == 1 && Int32.TryParse(args[0], out upperBound))
{
fizzBuzz.ProcessRange(upperBound, WriteOutput, rules);
}
else
{
Console.WriteLine("Incorrect arguments supplied. Please pass either no arguments, or an integer < {0}", int.MaxValue);
}
//Allow the user to press any key to terminate the console app
Console.WriteLine("\n\nPress any key to continue...");
Console.ReadKey();
}
public void ProcessNumber_Should_Handle_Large_Input()
{
var fizzBuzz = new RulesEngine();
MemoryStream stream = new MemoryStream();
StreamWriter writer = new StreamWriter(stream);
StreamReader reader = new StreamReader(stream);
fizzBuzz.ProcessRange(999999, WriteOutput);
}
public void ProcessNumbers_Should_Throw_Exception_For_Negative_Numbers()
{
var fizzBuzz = new RulesEngine();
Assert.Throws<ArgumentOutOfRangeException>(() => fizzBuzz.ProcessRange(-1));
}