public void FreeProductDiscountApplicationTestNonApplication()
{
var testDiscount = new FreeProductDiscount("Test2", 3);
var testItems = new List <ITotalCostCalculationItem>();
var testItem1 = new TotalCostCalculationItem(new ShoppingCartItem {
Product = new Product {
Name = "Test1", UnitPrice = 1
}, Quantity = 4
});
testItems.Add(testItem1);
var discountedItems = testDiscount.ApplyDiscount(testItems);
Assert.IsNotNull(discountedItems);
TestUtil.AssertEqualTotalCostCalculationItemLists(testItems, discountedItems);
var testItem2 = new TotalCostCalculationItem(new ShoppingCartItem {
Product = new Product {
Name = "Test2", UnitPrice = 1
}, Quantity = 2
});
testItems.Add(testItem2);
discountedItems = testDiscount.ApplyDiscount(testItems);
TestUtil.AssertEqualTotalCostCalculationItemLists(testItems, discountedItems);
}
public void FreeProductDiscountApplicationTestMultipleApplication()
{
var testDiscount = new FreeProductDiscount("Test2", 3);
var testItems = new List <ITotalCostCalculationItem>();
var testItem1 = new TotalCostCalculationItem(new ShoppingCartItem {
Product = new Product {
Name = "Test1", UnitPrice = 1
}, Quantity = 4
});
var testItem2 = new TotalCostCalculationItem(new ShoppingCartItem {
Product = new Product {
Name = "Test2", UnitPrice = 2
}, Quantity = 12
});
testItems.Add(testItem1);
testItems.Add(testItem2);
var discountedItems = testDiscount.ApplyDiscount(testItems);
var discountedTest1 = discountedItems.FirstOrDefault(x => x.ProductName == "Test1");
Assert.IsNotNull(discountedTest1);
TestUtil.AssertEqualTotalCostCalculationItems(testItem1, discountedTest1);
var discountedTest2 = discountedItems.FirstOrDefault(x => x.ProductName == "Test2");
Assert.IsNotNull(discountedTest2);
Assert.AreEqual(testItem2.ProductName, discountedTest2.ProductName);
Assert.AreEqual(testItem2.ProductUnitPrice, discountedTest2.ProductUnitPrice);
Assert.AreEqual(testItem2.ProductQuantity, discountedTest2.ProductQuantity);
//four Test2 should be free, so the discount is four times Test2 UnitPrice
Assert.AreEqual(8M, discountedTest2.Discount);
}
public void FreeProductDiscountConstructorTest()
{
var testDiscount = new FreeProductDiscount("Test", 3);
Assert.IsNotNull(testDiscount);
try
{
testDiscount = new FreeProductDiscount("Test", -2);
Assert.Fail();
}
catch (Exception e)
{
Assert.IsInstanceOfType(e, typeof(ArgumentException));
}
try
{
testDiscount = new FreeProductDiscount("Test", 0);
Assert.Fail();
}
catch (Exception e)
{
Assert.IsInstanceOfType(e, typeof(ArgumentException));
}
}
public void FreeProductDiscountApplicableTest()
{
var testDiscount = new FreeProductDiscount("Test2", 3);
var testItems = new List <ITotalCostCalculationItem>();
var testItem1 = new TotalCostCalculationItem(new ShoppingCartItem {
Product = new Product {
Name = "Test1", UnitPrice = 1
}, Quantity = 4
});
testItems.Add(testItem1);
Assert.IsFalse(testDiscount.IsDiscountApplicable(testItems));
var testItem2 = new TotalCostCalculationItem(new ShoppingCartItem {
Product = new Product {
Name = "Test2", UnitPrice = 1
}, Quantity = 2
});
testItems.Add(testItem2);
Assert.IsFalse(testDiscount.IsDiscountApplicable(testItems));
testItems.Clear();
var testItem3 = new TotalCostCalculationItem(new ShoppingCartItem {
Product = new Product {
Name = "Test2", UnitPrice = 5
}, Quantity = 5
});
testItems.Add(testItem1);
testItems.Add(testItem3);
Assert.IsTrue(testDiscount.IsDiscountApplicable(testItems));
}
