public List <int> GetRandomPositive(int?quantity = MAX_ITEMS_QUANTITY)
        {
            if (quantity.HasValue && quantity.Value > MAX_ITEMS_QUANTITY)
            {
                quantity = MAX_ITEMS_QUANTITY;
            }

            var generator = new RandomPositiveNumberGenerator();

            return(generator.Generate(quantity.Value));
        }
 public RandomPositiveNumberGeneratorTest()
 {
     _generator = new RandomPositiveNumberGenerator();
 }