public void T01_AddOrderItem_SingleProduct_NoDiscount()
{
//Arrange
var productC = new Product(Guid.NewGuid(), "C", 0.70m);
_pricingRulesRepository.GetByProductId(productC.ProductId).Returns(r => null);
var order = new CheckOutOrder(Guid.NewGuid(), _pricingStrategyFactory);
//Act
order.AddOrderItem(productC, 3);
decimal expectedTotalPrice = 2.10m;
//Assert
Assert.Equal(expectedTotalPrice, order.GetTotalPrice());
}
public void T03_AddOrderItem_SingleProduct_ShouldApplyDiscount()
{
//Arrange
var productA = new Product(Guid.NewGuid(), "A", 0.50m);
var pricingRuleForC = new VolumePricingRule(Guid.NewGuid(), productA.ProductId, 3, 1.30m);
_pricingRulesRepository.GetByProductId(productA.ProductId).Returns(pricingRuleForC);
var order = new CheckOutOrder(Guid.NewGuid(), _pricingStrategyFactory);
//Act
order.AddOrderItem(productA, 10);
decimal expectedTotalPrice = 4.40m;
//Assert
Assert.Equal(expectedTotalPrice, order.GetTotalPrice());
}
public void T04_AddOrderItem_MultipleProduct_MultipleUnits_ShouldApplyDiscount()
{
//Arrange
var productA = new Product(Guid.NewGuid(), "A", 0.50m);
var pricingRuleForA = new VolumePricingRule(Guid.NewGuid(), productA.ProductId, 3, 1.30m);
_pricingRulesRepository.GetByProductId(productA.ProductId).Returns(pricingRuleForA);
var productB = new Product(Guid.NewGuid(), "B", 0.30m);
var pricingRuleForB = new VolumePricingRule(Guid.NewGuid(), productB.ProductId, 2, 0.45m);
_pricingRulesRepository.GetByProductId(productB.ProductId).Returns(pricingRuleForB);
var productC = new Product(Guid.NewGuid(), "C", 0.70m);
_pricingRulesRepository.GetByProductId(productC.ProductId).Returns(r => null);
var productD = new Product(Guid.NewGuid(), "D", 0.20m);
_pricingRulesRepository.GetByProductId(productD.ProductId).Returns(r => null);
var order = new CheckOutOrder(Guid.NewGuid(), _pricingStrategyFactory);
//Act
order.AddOrderItem(productA);
order.AddOrderItem(productB);
order.AddOrderItem(productC);
order.AddOrderItem(productD);
order.AddOrderItem(productA);
order.AddOrderItem(productB);
order.AddOrderItem(productA);
decimal expectedTotalPrice = 2.65m;
//Assert
Assert.Equal(expectedTotalPrice, order.GetTotalPrice());
}