emilMircea / cashier-function

a simple cashier function in ruby

The assignment

build a cashier function that adds products to a cart and displays the total price.

The method to solve it

Thinking about the problem led to sketching the domain model.

Following the diagram I created four classes each having it's own responsibility. Along side I created a test spec file for each class.

What followed was a TDD approach in which I wrote each test first and then wrote the code to make the test pass.

Stepts to try it out

clone the repo and run bundle install

1. Load the chechout class:

in the terminal run

pry -r ./lib/checkout.rb

2.instantiate a checkout and product

co = Checkout.new

3. scan a product:

green_tea = Item.new('green tea', 10, 'GR1')
co.scan(green_tea)

4. check the total

co.total

Run the tests

bundle exec rspec --color