This challenge is for you to make use of your problem solving skills as well as demonstrate your understanding of good object-oriented programming and SOLID design principles.
At UNiDAYS our business is built on providing discounts to students. Your challenge is to build a basic discount system that applies discounts to an online shopping order and calculates the total price based on a set of pricing rules.
You may complete the challenge in any programming language you wish.
| Item | Price | Discount |
|---|---|---|
| A | £8.00 | None |
| B | £12.00 | 2 for £20.00 |
| C | £4.00 | 3 for £10.00 |
| D | £7.00 | Buy 1 get 1 free |
| E | £5.00 | 3 for the price of 2 |
Delivery charge £7.00
Free delivery on orders over £50.00 (inclusive)
Implement a UnidaysDiscountChallenge class with two methods.
AddToBasket- Pass in an itemCalculateTotalPrice- Calculate and return the total price, result should include the followingTotal- Total price of all items after applying any discountsDeliveryCharge- The delivery charge for the order
It should be possible to initialise your UnidaysDiscountChallenge class with the pricing rules. The example below shows how the interface might be used.
example = new UnidaysDiscountChallenge(pricingRules);
example.AddToBasket(itemOne);
example.AddToBasket(itemTwo);
result = example.CalculateTotalPrice();
totalPrice = result.Total;
deliveryCharge = result.DeliveryCharge;
overallTotal = totalPrice + deliveryCharge;
| Items | Total | Delivery Charge |
|---|---|---|
| None | £0.00 | £0.00 |
| A | £8.00 | £7.00 |
| B | £12.00 | £7.00 |
| C | £4.00 | £7.00 |
| D | £7.00 | £7.00 |
| E | £5.00 | £7.00 |
| BB | £20.00 | £7.00 |
| BBB | £32.00 | £7.00 |
| BBBB | £40.00 | £7.00 |
| CCC | £10.00 | £7.00 |
| CCCC | £14.00 | £7.00 |
| DD | £7.00 | £7.00 |
| DDD | £14.00 | £7.00 |
| EE | £10.00 | £7.00 |
| EEE | £10.00 | £7.00 |
| EEEE | £15.00 | £7.00 |
| DDDDDDDDDDDDDD | £49.00 | £7.00 |
| BBBBCCC | £50.00 | 0.00 |
| ABBCCCDDEE | £55.00 | 0.00 |
| EDCBAEDCBC | £55.00 | 0.00 |
You should provide a copy of your code and include a readme detailing how to run your code as well as how you approached the problem.
We're not too fussy about what platform your program runs on, but we do require that we're able to build and run your code ourselves.