- Once an item is selected and the appropriate amount of money is inserted, the vending machine should return the correct product
- It should also return change if too much money is provided, or ask for more money if insufficient funds have been inserted
- The machine should take an initial load of products and change. The change will be of denominations 1p, 2p, 5p, 10p, 20p, 50p, £1, £2
- There should be a way of reloading either products or change at a later point
- The machine should keep track of the products and change what it contains
- I have opted to spend more time on this test ( option 2: 4/5 hours ).
- I have indeed spend about 4.5 hours creating code and about 2 hours planning on how to create the classes, methods and execute the functionality in the simplest way
-
Please clone it repository to your local device (make sure you have Bundler and Ruby installed to start running this application)
-
Once the repository is cloned please run
bundle
- Run the following command in your terminal
ruby snack_away.rb
- The vending machine will switch on and you will see the following:
"Hey there, someone's hungry?!🍫🍿🙈\nGo on then, make your choice!"
Take a look at our selection:
Code: 01, name: Coca-Cola, price: 85 quantity: 10.
Code: 02, name: Fanta, price: 100 quantity: 12.
Code: 03, name: Diet-Coke, price: 150 quantity: 8.
Code: 04, name: Dr. Pepper, price: 100 quantity: 9.
Evian is SOLD out, sorry!😣
Code: 06, name: Maltesers, price: 200 quantity: 4.
Code: 07, name: Skittles, price: 85 quantity: 1.
"To buy a snack, please insert some coins and then confirm the the item code!"
"Please insert coins, we take 1p, 2p, 5p, 10p, 20p, 50p, 100p and 200p!"
- Please insert the money and type in "yes", if you are happy with the amount or "no" to continue inserting money
200
"Please select yes if you have put it enough money, no to continue inserting coins"
yes
- If you have typed "yes", you can then select the item you want
"Please select the snack code"
3
"Please collect your Diet-Coke"
"Please, don't forget your change: 50p!"
- If you have selected "no" you can continue inserting money until you do press yes
"Please insert coins, we take 1p, 2p, 5p, 10p, 20p, 50p, 100p and 200p!"
200
"Please select yes if you have put it enough money, no to continue inserting coins"
no
"Please insert coins, we take 1p, 2p, 5p, 10p, 20p, 50p, 100p and 200p!"
200
"Please select yes if you have put it enough money, no to continue inserting coins"
no
"Please insert coins, we take 1p, 2p, 5p, 10p, 20p, 50p, 100p and 200p!"
200
"Please select yes if you have put it enough money, no to continue inserting coins"
yes
"Please select the snack code"
7
"Please collect your Skittles"
"Please, don't forget your change: £2, £2, £1, 10p, 5p!"
- If you have inserted money but it is still not enough for the purchase, the vending machine will ask for you to start the process again
"Please insert coins, we take 1p, 2p, 5p, 10p, 20p, 50p, 100p and 200p!"
50
"Please select yes if you have put it enough money, no to continue inserting coins"
yes
"Please select the snack code"
7
"Please, start again and insert more money next time ☺️"
- If you have input a wrong coin, the machine will prompt you not to do that again and it won't add the amount to your funds
"Please insert coins, we take 1p, 2p, 5p, 10p, 20p, 50p, 100p and 200p!"
300
"Please only used valid coins"
"Please select yes if you have put it enough money, no to continue inserting coins"
yes
"Please select the snack code"
7
"Please, start again and insert more money next time ☺️"
- In order to restock an item please open terminal and follow the steps below:
2.7.0 :001 > require "./lib/vending_machine.rb"
=> true
2.7.0 :002 > machine = VendingMachine.new
2.7.0 :003 > machine.restock_item("Evian",2)
=> 2
- In order to restock an item please open terminal and follow the steps below:
2.7.0 :001 > require "./lib/vending_machine.rb"
=> true
2.7.0 :004 > machine.reload_change(20,2)
=> 32
Analysis
- Breakdown and understand all requirements
- Create user stories for better understanding of the task.
As a user,
So that I know that the vending machine is working,
I would like to see a welcome message
As a user,
So that I understand how to purchase an item,
I would like to see instructions how to do so
As a user,
So that I can choose an item I want to buy from a vending machine,
I would like to see a code that the item is related to
As a user,
So that I know how much I have to pay for an item
I would like to see a price of an item
As a user,
So that I know I made an incorrect input,
I would like to get a warning message if I input a wrong item code
As a user,
So that I know that I still need to put in more money into machine,
I would like to be notified about more change needed
As a user,
So that I know that the item is ready for collection,
I would like to be notified that the item I bought has been issued
As a user,
So that I know that that the change has been issued,
I would like to be notified that the change and its exact amount is ready to be collected
Design
- Identify the actors and functions needed to fulfill requirements.
- Use this to inform the design of classes and methods.
- Tech Design - please refer to tech_design.md file
Implementation
- Follow TDD to develop the vending machine.
- Use IRB to check methods and functionality
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