The foundations of this solution were created using https://www.npmjs.com/package/generator-angular-es6-webpack, which creates all the base files for an Angular 1.5 app, with ES6, SCSS support.

Angular was chosen first because of my familiarity/knowledge of the framework, but also because:

• Easy for single-page applications
• Easy to implement live updates (e.g. update shopping cart dynamically)
• Easy to unit test
• Modular architecture

Getting started

• Make sure you have got node and npm installed. Note: version 7 was used for this. You can change the node version easily by installing nvm (node virtual machine).
• cd into the folder and run npm install
  • Note: if you installed nvm, then run nvm install 7, and then nvm use 7

Running App

• Run gulp serve and access http://127.0.0.1:9001/

Running Unit Tests

• Run gulp karma

Running Protactor Test (Selenium)

• Run ./node_modules/webdriver-manager/bin/webdriver-manager update to ensure you've got the latest version of the webdriver.
• Run ./node_modules/webdriver-manager/bin/webdriver-manager start to start the selenium server. Then on another terminal:
• Run gulp protractor to run the actual tests. Remember that every time you open a new terminal you might need to run nvm use 7.

Notes

If I had given more time to invest in the project, I would have:

• Unit test everything. I only included one unit test for each kind of angular concept (controller, service, component).
• More functional tests (E2E) using Protractor (Selenium for AngularJS). Would have added more assertions and tests for the cart page.
• Although I tried to organize my CSS, it could be improved, e.g. put all animations inside _animation.scss