0xff6a / vending-machine

Technical Test

Tech Test: Vending Machine

Ruby Version:

Ruby 2.1.2

Objectives:

• Design a vending machine in code
• Machine should have an initial load of products and change and can be subsequently reloaded
• Machine will release a product if sufficient funds are given
• Machine will return change if too much money is given

Classes:

• Vending Machine: returns a product in exchange for money
• Product: item with a price and id
• Basket: collection of products
• Change: has a denomination and amount

Workings:

• Change object is creating using denominations in pence rather than strings e.g '£1', but could be easily adapted to translate if required
• Did not add functionality to reload machine to runner script due to time constraints but functionality is demonstrated in tests

Running the test suite:

From root directory:

$ rspec

Running the Application:

From root directory:

$ ruby run.rb

Output:

Machine Contents
[#<Product:0x007fc9ca9028d8 @id=0, @price=55>,     
#<Product:0x007fc9ca05ff78 @id=1, @price=75>,     
#<Product:0x007fc9ca05eec0 @id=2, @price=97>]
Please enter a product id:
1
Please enter money provided
99
[#<Product:0x007fc97085e7b0 @id=1, @price=75>,     
[#<Change:0x007fc97084d2d0 @denomination=20, @amount=1>,     
#<Change:0x007fc97084d280 @denomination=2, @amount=2>]]