public void TestCalculationOfRentalPrice()
{
ICostCalculator calculator = new CostCalculator();
var price = calculator.CalculateCosts(new DateTime(2019, 2, 14, 8, 15, 0), new DateTime(2019, 2, 14, 10, 30, 0), 3, 5);
Assert.Equal(13, price);
price = calculator.CalculateCosts(new DateTime(2018, 2, 14, 8, 15, 0), new DateTime(2018, 2, 14, 8, 45, 0), 3, 100);
Assert.Equal(3, price);
price = calculator.CalculateCosts(new DateTime(2018, 2, 14, 8, 15, 0), new DateTime(2018, 2, 14, 8, 25, 0), 20, 100);
Assert.Equal(0, price);
Assert.Throws <InvalidOperationException>(() => calculator.CalculateCosts(new DateTime(2019, 2, 14, 10, 30, 0), new DateTime(2018, 2, 14, 10, 30, 0), 3, 5));
}
public void CheckCalculateCalculateCostsCalculatesCorrectly(int buttersQty, int milksQty, int breadsQty, decimal finalCost)
{
// Arrange
IPromoRepository promoRepository = new PromoRepository();
IProductRepository productRepository = new ProductRepository();
List <IPromo> testPromosList = new List <IPromo>()
{
promoRepository.GetPromoOne(), promoRepository.GetPromoTwo()
};
List <IProduct> testProductsList = productRepository.GetProducts(buttersQty, milksQty, breadsQty);
IGroceriesBasket basket = new GroceriesBasket();
basket.AddProducts(testProductsList);
ICostCalculator costCalculator = new CostCalculator(basket, testPromosList);
// Act
costCalculator.CalculateCosts();
// Assert that all the involved Costs are as they should be
Assert.Equal(testProductsList.Sum(product => product.Price), costCalculator.TotalCost); // Total Cost of the Items
Assert.Equal(testPromosList.Sum(promo => promo.CalculateDeduction(testProductsList)), costCalculator.PromosDeductions); // Total Deductions from the applied Promos
Assert.Equal(finalCost, costCalculator.FinalCost); // Final Cost
}