public void Pick_WeightedSymbolCollectionFactory_RandomPicksMatchesWeightDistribution(int tries)
{
RandomWeightedSymbolPicker randomWeightedSymbolPicker = new RandomWeightedSymbolPicker();
WeightedSymbolCollectionFactory weightedSymbolCollectionFactory = new WeightedSymbolCollectionFactory();
IEnumerable <WeightedSymbol> weightedSymbols = weightedSymbolCollectionFactory.Create();
List <WeightedSymbol> picks = randomWeightedSymbolPicker.Pick(weightedSymbols, tries).ToList();
var picksSymbolGroup = picks.GroupBy(y => y);
foreach (var symbolGroup in picksSymbolGroup)
{
WeightedSymbol weightedSymbol = symbolGroup.Key;
int symbolGroupCount = symbolGroup.Count();
// What is the calculated weight of the symbol we actually picked with the random picker?
double avgPickWeight = symbolGroupCount / (double)tries;
// What is the actual predefined weight?
double wsWeight = symbolGroup.Key.Weight;
const double similarPcnt = 0.01;
// The weights should be very similar. Let's say 1% similar.
double wsWeightMin = wsWeight - wsWeight * similarPcnt;
double wsWeightMax = wsWeight + wsWeight * similarPcnt;
Assert.IsTrue(avgPickWeight >= wsWeightMin);
Assert.IsTrue(avgPickWeight <= wsWeightMax);
}
}
public void Pick_WeightedSymbolCollectionFactory_ResultCountMatchesTries(int tries)
{
RandomWeightedSymbolPicker randomWeightedSymbolPicker = new RandomWeightedSymbolPicker();
WeightedSymbolCollectionFactory weightedSymbolCollectionFactory = new WeightedSymbolCollectionFactory();
IEnumerable <WeightedSymbol> weightedSymbols = weightedSymbolCollectionFactory.Create();
List <WeightedSymbol> picks = randomWeightedSymbolPicker.Pick(weightedSymbols, tries).ToList();
Assert.AreEqual(picks.Count, tries);
}
public RandomWeightedSymbolPickerController(RandomWeightedSymbolPicker randomWeightedSymbolPicker,
WeightedSymbolCollectionFactory weightedSymbolCollectionFactory)
{
this.randomWeightedSymbolPicker = randomWeightedSymbolPicker;
this.weightedSymbolCollectionFactory = weightedSymbolCollectionFactory;
}
