public void AddItemTest_withQuantity_itemNotInCartAlready_itemAddedWithQuantity() {
ShoppingCart cart = new ShoppingCart();
Item item = new Item("Apple");
cart.AddItem(item, 3);
Assert.IsTrue(cart.DoesCartContainItem(item));
Assert.AreEqual(3, cart.GetLineItemForItem(item).Quantity);
}
public void AddItemTest_itemNotInCart_addsItem() {
ShoppingCart cart = new ShoppingCart();
Assert.AreEqual(0, cart.CountOfItems);
Item item = new Item("Apple");
cart.AddItem(item);
Assert.IsTrue(cart.DoesCartContainItem(item));
Assert.AreEqual(1, cart.CountOfItems);
}
public void AddItemTest_itemInCart_addsAdditionalItemToLineItemCount() {
ShoppingCart cart = new ShoppingCart();
Item item = new Item("Apple");
cart.AddItem(item);
Assert.IsTrue(cart.DoesCartContainItem(item));
Assert.AreEqual(1, cart.CountOfItems);
cart.AddItem(item);
Assert.AreEqual(1, cart.CountOfItems);
LineItem lineItem = cart.GetLineItemForItem(item);
Assert.AreEqual(2, lineItem.Quantity);
}
public ShoppingCart GetShoppingCart(String filename) {
if (!File.Exists(filename)) {
Console.WriteLine("File does not exist: " + filename);
return new ShoppingCart();
}
string[] items = File.ReadAllLines(filename);
ShoppingCart cart = new ShoppingCart();
foreach (string item in items) {
if (item.Trim().Length == 0) {
continue;
}
cart.AddItem(new Item(item.Trim()));
}
return cart;
}
public void PrintShoppingCart(ShoppingCart cart) {
Console.WriteLine("Shopping Cart");
Console.WriteLine("-------------");
foreach (LineItem lineItem in cart.GetLineItems()) {
Console.WriteLine("- {0}, Qty: {1}, Regular Price: ${2}",
lineItem.Item.ItemName,
lineItem.Quantity,
String.Format("{0:0.00}",lineItem.PricePerUnit));
if (lineItem.Promotion != null) {
Console.WriteLine(" Promotion Applied: {0}", lineItem.Promotion.GetPromotionDescription());
List<string> promotionText = lineItem.Promotion.GetPromotionText(lineItem);
foreach (string textLine in promotionText) {
Console.WriteLine(" {0}", textLine);
}
}
Console.WriteLine(" Cost: ${0}", String.Format("{0:0.00}",lineItem.TotalCost));
}
Console.WriteLine("-------------");
Console.WriteLine("Total Bill: ${0}", String.Format("{0:0.00}",cart.GetTotal()));
}
public void DoesCartHaveGreaterThanOrEqualItems_itemInCart_quantityIsNotGreater_returnsFalse() {
ShoppingCart cart = new ShoppingCart();
Item item = new Item("Apple");
cart.AddItem(item, 1);
Assert.IsFalse(cart.DoesCartHaveGreaterThanOrEqualItems(item, 3));
}
public void DoesCartHaveGreaterThanOrEqualItems_itemNotInCart_returnsFalse() {
ShoppingCart cart = new ShoppingCart();
Assert.IsFalse(cart.DoesCartHaveGreaterThanOrEqualItems(new Item("Apple"), 1));
}
public void DoesCartHaveGreaterThanOrEqualItems_negativeQuantity_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.DoesCartHaveGreaterThanOrEqualItems(new Item("Apple"), -1);
}
public void DoesCartHaveGreaterThanOrEqualItems_nullItem_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.DoesCartHaveGreaterThanOrEqualItems(null, 1);
}
public void ApplyPromotion(ShoppingCart cart) {
cart.AttachPromotionToItem(item, this);
}
public void AddItemTest_withQuantity_nullItem_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.AddItem(null, 1);
}
public void AttachPromotionToItemTest_nullItem_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.AttachPromotionToItem(null, new QuantityPricePromotion(new Item("Apple"), "[email protected]"));
}
public void GetLineItemForItemTest_itemInCart_returnsNull() {
ShoppingCart cart = new ShoppingCart();
Item item = new Item("Apple");
cart.AddItem(item);
LineItem lineItem = cart.GetLineItemForItem(item);
Assert.IsNotNull(lineItem);
}
public void GetLineItemForItemTest_itemNotInCart_returnsNull() {
ShoppingCart cart = new ShoppingCart();
LineItem lineItem = cart.GetLineItemForItem(new Item("Apple"));
Assert.IsNull(lineItem);
}
public void GetLineItemForItemTest_nullItem_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.GetLineItemForItem(null);
}
public void AttachPromotionToItemTest_nullPromotion_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.AttachPromotionToItem(new Item("Apple"), null);
}
public void AddItemTest_itemIsNull_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.AddItem(null);
}
public void AddItemTest_withQuantity_negativeQuantity_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.AddItem(new Item("Apple"), -1);
}
public void AttachPromotionToItemTest_itemNotInCart_nothingHappens() {
ShoppingCart cart = new ShoppingCart();
Item item = new Item("Apple");
Item item2 = new Item("Bananas");
cart.AddItem(item);
cart.AttachPromotionToItem(item2, new QuantityPricePromotion(item2, "[email protected]"));
LineItem lineItem = cart.GetLineItemForItem(item);
Assert.IsNull(lineItem.Promotion);
}
public void GetTotalTest_validTotalsReturned() {
ShoppingCart cart = new ShoppingCart();
Item apple = new Item("Apple");
Item bananas = new Item("Bananas");
cart.AddItem(apple, 3);
cart.AddItem(bananas, 3);
LineItem applesLineItem = cart.GetLineItemForItem(apple);
applesLineItem.PricePerUnit = 2.00;
LineItem bananasLineItem = cart.GetLineItemForItem(bananas);
bananasLineItem.PricePerUnit = 3.00;
Assert.AreEqual(15.00, cart.GetTotal());
}
public bool DoesPromotionApply(ShoppingCart cart) {
if (cart == null) {
throw new ArgumentException(ERROR_MSG_NULL_SHOPPING_CART);
}
return cart.DoesCartHaveGreaterThanOrEqualItems(item, MinimumNumberItemsForPromotion);
}
