public void CustomerPostcode_IsReturned_WhenOrderAdded() { //Arrange OrderFunctionality o9 = new OrderFunctionality(); Order o3 = new Order("REF-000-001", "test", "name", "1 High St", "town", "county", "BT71AA", "01/03/2020"); o9.NewOrder(o3); //Act int i = o9.OrderInformation("REF-000-001"); //Assert Assert.AreEqual(o9.OrderPostcode(i), "BT71AA"); }