public void AddCustomerToOrder() { // arrange OrderController oCtrl = new OrderController(); CustomerController cCtrl = new CustomerController(); ZipCityController zCtrl = new ZipCityController(); Customer customer = new Customer { _address = "Ibsvej 1", _email = "*****@*****.**", _fName = "Ib", _lName = "Ibsen", _phone = "24440744", _zipCity = zCtrl.ReadByZipCode("9000") }; // act int orderId = oCtrl.CreateOrder(); int customerId = cCtrl.Create(customer); oCtrl.AddCustomer(orderId, customerId); Order newOrder = oCtrl.ReadOrder(orderId); // assert Assert.IsTrue(newOrder._customer._id == customerId); }