public void CalculateOrderWeight_ReturnCorrectWeight()
{
var order = new SalesOrder
{
Lines = new List <SalesOrderLine>
{
new SalesOrderLine
{
Product = new Product
{
Weight = 12m
}
},
new SalesOrderLine
{
Product = new Product
{
Weight = 18m
}
}
}
};
// Act
var weight = order.GetOrderShippingWeight();
// Assert
Assert.Equal(30, weight);
}
/// <summary>
/// Given an order, calculate the best shipping amount according to ShippingWeightRate rule
/// </summary>
/// <param name="order"></param>
/// <returns>The shipping amount sent and total shipping cost</returns>
public Tuple <decimal, decimal> CalculateWeightBasedOptimalShippingAmount(SalesOrder order)
{
var shippingCost = 0m;
var shippingWeight = order.GetOrderShippingWeight();
if (shippingWeight >= 1 && shippingWeight <= 5)
{
shippingCost = shippingWeight * 10;
}
else if (shippingWeight > 5 && shippingWeight <= 50 / 7)
{
// If weight is between 5kg and 7kg, shipping 5kg with $5 is the optimum option
shippingCost = 50m;
shippingWeight = 5m;
}
else if (shippingWeight > 50 / 7 && shippingWeight < 10)
{
shippingCost = shippingWeight * 7;
}
else
{
shippingCost = shippingWeight * 20;
}
return(new Tuple <decimal, decimal>(shippingWeight, shippingCost));
}
public void CalculateOrderWeightWithNullProductList_ReturnZero()
{
var order = new SalesOrder();
// Act
var weight = order.GetOrderShippingWeight();
// Assert
Assert.Equal(0m, weight);
}
/// <summary>
/// Given an order, calculate the best shipping amount according to ShippingPriceRate rule
/// </summary>
/// <param name="order"></param>
/// <returns>The shipping amount sent and total shipping cost</returns>
public Tuple <decimal, decimal> CalculatePriceBasedOptimalShippingAmount(SalesOrder order)
{
var totalPrice = order.GetOrderPrice();
// From the ShippingPriceRate rule, we can see that we should send as much amount as possible
var shippingCost = 0m;
var shippingWeight = order.GetOrderShippingWeight();
if (totalPrice >= 0 && totalPrice <= 50)
{
shippingCost = shippingWeight * 5.5m;
}
else if (totalPrice > 50 && totalPrice < 100)
{
// As shipping rate between $50 and $100 is zero, the optimised shipping amount is max at 50kg
if (shippingWeight <= 50)
{
shippingCost = shippingWeight * 5.5m;
}
else
{
shippingCost = shippingWeight * 0m;
}
}
else if (totalPrice >= 100 && totalPrice <= 500)
{
shippingCost = shippingWeight * 10m;
}
else if (totalPrice > 500 && totalPrice < 1000)
{
// There is no rule for price rages [500, 1000], so assume that there is no cost for shipping
shippingCost = 0;
}
else if (totalPrice >= 1000)
{
shippingCost = shippingWeight * 15m;
}
return(Tuple.Create(shippingWeight, shippingCost));
}
/// <summary>
/// Given an order, calculate the best shipping amount according to ShippingAPIRate rule
/// </summary>
/// <param name="order"></param>
/// <returns>The shipping amount sent and total shipping cost</returns>
public Tuple <decimal, decimal> CalculateThridPartyBasedOptimalShippingAmount(SalesOrder order)
{
var shippingCost = 0m;
var shippingWeight = order.GetOrderShippingWeight();
if (shippingWeight >= 0 && shippingWeight < 10)
{
shippingCost = shippingWeight * _client.GetRate(0, 0, shippingWeight);
}
else if (shippingWeight >= 10 && shippingWeight <= 30)
{
shippingCost = shippingWeight * (_client.GetRate(0, 0, shippingWeight) + 5);
}
else if (shippingWeight > 30 && shippingWeight <= 35)
{
shippingCost = shippingWeight * (_client.GetRate(0, 0, shippingWeight) * 1.075m);
}
else if (shippingWeight > 35)
{
shippingCost = shippingWeight * _client.GetRate(0, 0, shippingWeight);
}
return(new Tuple <decimal, decimal>(shippingWeight, shippingCost));
}