public void CalculateYearRuleDiscount_ReturnsDiscountGrandTotal(CarsPurchaseResponse input, CarsPurchaseResponse expected)
{
var output = _yearRule.CalculateDiscount(input);
Assert.Equal(expected.GrandTotal, output.GrandTotal);
Assert.Equal(expected.TotalDiscount, output.TotalDiscount);
}
public CarsPurchaseResponse CalculateDiscount(CarsPurchaseResponse carDiscount)
{
var grandTotal = carDiscount.GrandTotal;
var percentage = grandTotal >= _minCost ? _discountPercentage : 0.00;
carDiscount.TotalDiscount += grandTotal.CalculateDiscount(percentage);
carDiscount.GrandTotal -= grandTotal.CalculateDiscount(percentage);
return(carDiscount);
}
public CarsPurchaseResponse CalculateDiscount(CarsPurchaseResponse carDiscount)
{
var grandTotal = carDiscount.GrandTotal;
var noOfCars = carDiscount.CarPurchaseCollection.Count();
var percentage = noOfCars >= _carCount ? _discountPercentage : 0;
carDiscount.TotalDiscount += grandTotal.CalculateDiscount(percentage);
carDiscount.GrandTotal -= grandTotal.CalculateDiscount(percentage);
return(carDiscount);
}
public void CalculateCumulativeDiscount_ReturnsDiscountGrandTotal(CarsPurchaseResponse input, CarsPurchaseResponse expected)
{
//Arrange Data
var _mockMapper = new Mock <IMapper>();
var _carDiscountRules = new Mock <IEnumerable <ICarDiscountRule> >();
var discountRules = new List <ICarDiscountRule>()
{
new YearRule(2000, 10, true),
new CountRule(2, 3, true),
new CostRule(100000, 5, true)
};
_carDiscountRules.Setup(m => m.GetEnumerator()).Returns(() => discountRules.GetEnumerator());
_mockMapper.Setup(x => x.Map <CarsPurchaseResponse>(It.IsAny <IEnumerable <SelectCar> >()))
.Returns((IEnumerable <SelectCar> source) =>
{
var purchaseResponse = new CarsPurchaseResponse()
{
CarPurchaseCollection = source.Select(
e => new CarPurchaseResponse()
{
Id = e.Id,
LineDiscount = 0,
Price = e.Price,
Year = e.Year
}),
GrandTotal = 0,
TotalDiscount = 0
};
return(purchaseResponse);
});
var _carDiscountRuleProcessorService = new CarDiscountRuleProcessorService(_carDiscountRules.Object, _mockMapper.Object);
//Act
var output = _carDiscountRuleProcessorService.CalculateDiscount(input.CarPurchaseCollection.Select(e => new SelectCar()
{
Id = e.Id, Price = e.Price, Year = e.Year
}));
Assert.Equal(expected.GrandTotal, output.GrandTotal);
Assert.Equal(expected.TotalDiscount, output.TotalDiscount);
}
public CarsPurchaseResponse CalculateDiscount(CarsPurchaseResponse carDiscount)
{
carDiscount.GrandTotal = carDiscount.CarPurchaseCollection.Sum(e => e.Price) - carDiscount.CarPurchaseCollection.Sum(e => e.LineDiscount);
carDiscount.TotalDiscount = carDiscount.CarPurchaseCollection.Sum(e => e.LineDiscount);
foreach (var carLine in carDiscount.CarPurchaseCollection)
{
var percentage = carLine.Year <= _year ? _discountPercentage : 0;
carLine.LineDiscount = carLine.Price.CalculateDiscount(percentage);
carLine.Price.CalculateDiscount(percentage);
carDiscount.GrandTotal -= carLine.LineDiscount;
carDiscount.TotalDiscount += (carLine.LineDiscount);
}
return(carDiscount);
}
