public void TotalItemCost_Success(double itemOnePrice, double itemTwoPrice, int itemOneQty, int itemTwoQty, double expectedResult) { //Arrange _sut = new BusinessCore.Areas.ShoppingBasket.Models.ShoppingBasket { Items = new List <IItem> { new Item { PricePerItem = itemOnePrice, Qty = itemOneQty }, new Item { PricePerItem = itemTwoPrice, Qty = itemTwoQty } } }; //Act var result = _sut.TotalItemsCost(); //Assert result.Should().Be(expectedResult); }