public void AddResource() { var service = new StorageService(); var startQuantity = 20m; var startCostPrice = 2m; var quantity = 10m; var price = 5m; var resourceExpected = CreateResourcePool(startQuantity, startCostPrice); resourceExpected.Quantity += quantity; resourceExpected.TotalCost = resourceExpected.GetTotalCost() + (quantity * price); resourceExpected.CostPrice = resourceExpected.TotalCost / resourceExpected.Quantity; var resourceActual = CreateResourcePool(startQuantity, startCostPrice); service.AddResource(resourceActual, quantity, price); Assert.Equal(resourceExpected.Quantity, resourceActual.Quantity); Assert.Equal(resourceExpected.CostPrice, resourceActual.CostPrice); Assert.Equal(resourceExpected.GetTotalCost(), resourceActual.GetTotalCost()); }