public Buyer Provide(IReadOnlyAssortment assortment, string name)
{
if (assortment == null)
{
throw new ArgumentNullException(nameof(assortment));
}
var result = new Buyer(name);
var random = new Random();
var shoppingListLength = random.Next(0, 31);
var startSpecIndex = random.Next(0, assortment.ProductSpecifications.Count - shoppingListLength);
foreach (var spec in assortment.ProductSpecifications.Skip(startSpecIndex))
{
result.AddShoppingListPosition(spec, random.Next(1, 11));
}
return(result);
}