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_nullItem_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.DoesCartHaveGreaterThanOrEqualItems(null, 1);
}
public void DoesCartHaveGreaterThanOrEqualItems_negativeQuantity_expectException() {
ShoppingCart cart = new ShoppingCart();
cart.DoesCartHaveGreaterThanOrEqualItems(new Item("Apple"), -1);
}
public bool DoesPromotionApply(ShoppingCart cart) {
if (cart == null) {
throw new ArgumentException(ERROR_MSG_NULL_SHOPPING_CART);
}
return cart.DoesCartHaveGreaterThanOrEqualItems(item, MinimumNumberItemsForPromotion);
}