public void CalculateTotalCost_WithMultipleItems_CalculatesTotalCost()
{
//arrange
double price = 12.5;
int quantity = 3;
ShoppingBasketItem item = new ShoppingBasketItem(new Product("test", price), quantity);
double expectedTax = (item.CalculateSingleItemTax() + price) * quantity;
//act
double actualTax = item.CalculateTotalCost();
//assert
Assert.AreEqual(expectedTax, actualTax, "total cost incorrectly calculated for item with quantity of 3");
}
public void AddItem_WithNewBasket_UpdatesTotals()
{
//arrange
ShoppingBasket basket = new ShoppingBasket();
ShoppingBasketItem item = new ShoppingBasketItem(new Product("test", 5.5, ProductType.Other));
double expetedTotalCost = item.CalculateTotalCost();
double expectedTotalTax = item.CalculateTotalTax();
//act
basket.AddItem(item);
//assert
Assert.AreEqual(expectedTotalTax, basket.TotalTax, "Total tax not updated correctly");
Assert.AreEqual(expetedTotalCost, basket.TotalCost, "Total cost not update correctly");
}
public void AddItem_WithMultipleItems_UpdatesTotals()
{
//arrange
ShoppingBasket basket = new ShoppingBasket();
ShoppingBasketItem item1 = new ShoppingBasketItem(new Product("test", 5.5, ProductType.Other));
ShoppingBasketItem item2 = new ShoppingBasketItem(new Product("test", 8.75, ProductType.Food));
double expetedTotalCost = item1.CalculateTotalCost() + item2.CalculateTotalCost();
double expectedTotalTax = item1.CalculateTotalTax() + item2.CalculateTotalTax();
//act
basket.AddItem(item1);
basket.AddItem(item2);
//assert
Assert.AreEqual(expectedTotalTax, basket.TotalTax, "Total tax not updated correctly");
Assert.AreEqual(expetedTotalCost, basket.TotalCost, "Total cost not update correctly");
}
/// <summary>
/// Displays the details of a single item to the console.
/// </summary>
public override void DisplayReport()
{
Console.WriteLine(string.Format("{0} {1} at {2}", _item.Quantity, GetItemDisplayName(), FormatPrice(_item.CalculateTotalCost())));
}
