public void TestCompundDiscountPolicy_XOR()
{
cart.AddProduct(store, 1, 1, false);
cart.AddProduct(store, 2, 7, false);
PurchaseBasket basket = cart.GetBasket(store);
DiscountPolicy minItemsBasketPolicy = new ConditionalBasketDiscount(preCondition: preConditionsDict[CommonStr.DiscountPreConditions.NumUnitsInBasketAboveEqX], discount: 20, minUnitsAtBasket: 7);
DiscountPolicy MinUnitsProductPolicy = new ConditionalProductDiscount(preCondition: preConditionsDict[CommonStr.DiscountPreConditions.NumUnitsOfProductAboveEqX], discount: 30, minUnits: 1, productId: 1);
List <DiscountPolicy> policies_lst = new List <DiscountPolicy>();
policies_lst.Add(minItemsBasketPolicy);
policies_lst.Add(MinUnitsProductPolicy);
DiscountPolicy compundDiscount = new CompundDiscount(CommonStr.DiscountMergeTypes.XOR, policies_lst);
double discount = compundDiscount.CalcDiscount(basket);
double expected = 3000;
Assert.AreEqual(expected, discount);
}
public static DiscountPolicy Parse(string text)
{
if (simpleDiscountRegex.IsMatch(text))
{
if (conditionalBasketDiscountRegex.IsMatch(text))
{
string[] constructs = text.Split(':');
int precondition = Convert.ToInt32(constructs[1]);
double discount = Convert.ToDouble(constructs[2]);
return(new ConditionalBasketDiscount(discount, new DiscountPreCondition(precondition)));
}
else if (conditionalBasketDiscountMBPRegex.IsMatch(text))
{
string[] constructs = text.Split(':');
int precondition = Convert.ToInt32(constructs[1]);
double discount = Convert.ToDouble(constructs[2]);
double minBasketPrice = Convert.ToDouble(constructs[3]);
return(new ConditionalBasketDiscount(new DiscountPreCondition(precondition), discount, minBasketPrice));
}
else if (conditionalBasketDiscountMPPRegex.IsMatch(text))
{
string[] constructs = text.Split(':');
int precondition = Convert.ToInt32(constructs[1]);
double discount = Convert.ToDouble(constructs[2]);
double minProductPrice = Convert.ToDouble(constructs[3]);
return(new ConditionalBasketDiscount(minProductPrice, discount, new DiscountPreCondition(precondition)));
}
else if (conditionalBasketDiscountMUBRegex.IsMatch(text))
{
string[] constructs = text.Split(':');
int precondition = Convert.ToInt32(constructs[1]);
double discount = Convert.ToDouble(constructs[2]);
int minUnitsAtBasket = Convert.ToInt32(constructs[3]);
return(new ConditionalBasketDiscount(new DiscountPreCondition(precondition), discount, minUnitsAtBasket));
}
else if (conditionalProductDiscountRegex.IsMatch(text))
{
string[] constructs = text.Split(':');
int minUnits = Convert.ToInt32(constructs[1]);
int productId = Convert.ToInt32(constructs[2]);
int precondition = Convert.ToInt32(constructs[3]);
double discount = Convert.ToDouble(constructs[4]);
return(new ConditionalProductDiscount(new DiscountPreCondition(precondition), discount, minUnits, productId));
}
else if (revealdDiscountRegex.IsMatch(text))
{
string[] constructs = text.Split(':');
double discount = Convert.ToDouble(constructs[1]);
int productId = Convert.ToInt32(constructs[2]);
return(new RevealdDiscount(productId, discount));
}
}
else // compount discount
{
int counter = 0;
string curr = "";
string[] constructs = Regex.Split(text, "(XOR|OR|AND)");
if (constructs.Length <= 1)
{
return(new RevealdDiscount(-1, -1));
}
string opStr = constructs[1];
int op = opStr == "XOR" ? 0 : opStr == "OR" ? 1 : opStr == "AND" ? 2 : -1;
if (op == -1)
{
return(new RevealdDiscount(-3, -3));
}
string restText = text.Substring(opStr.Length + 2, text.Length - 1 - opStr.Length - 2);
List <string> discounts = new List <string>();
for (int i = 0; i < restText.Length; i++)
{
if (restText[i] == '(')
{
if (counter == 0) // shift from 0 to 1 -> new element
{
curr = "";
}
counter++;
}
else if (restText[i] == ')')
{
if (counter == 1) // shift from 1 to 0 -> finish the current element
{
curr += restText[i];
discounts.Add(curr);
curr = "";
}
counter--;
}
else if (restText[i] == ' ' && counter == 0)
{
if (!discounts.Contains(curr) && curr != "")
{
discounts.Add(curr);
curr = "";
}
}
if (!(counter == 0 || curr == ")"))
{
curr += restText[i];
}
if (counter == 0 && restText[i] != ')' && restText[i] != '(' && restText[i] != ' ')
{
curr += restText[i];
}
}
if (curr != "")
{
discounts.Add(curr);
}
if (counter != 0)
{
return(new RevealdDiscount(-1, -1));
}
List <DiscountPolicy> children = new List <DiscountPolicy>();
foreach (string discount in discounts)
{
DiscountPolicy discountPolicy = Parse(discount);
if (checkDiscount(discountPolicy) == false) // this indicates an error!
{
return(new RevealdDiscount(-2, -2));
}
else
{
children.Add(discountPolicy);
}
}
DiscountPolicy compoundDiscount = new CompundDiscount(op, children);
return(compoundDiscount);
}
return(new RevealdDiscount(-4, -4));
}
