Fruit Basket Kata - 🍎🍊🍉🛒💷🥋

This is a NodeJS implementation of a fruit basket order Kata.

Install & Run

• git clone this repo
• npm install
• npm test
• npm start

Requirements

We are a national supermarket chain that is interested in starting to use special offers in our stores. We stock the following products:

Item	Price (💷 £)
🍎 Apple	0.20
🍊 Orange	0.50
🍉 Watermelon	0.80

We would like to allow the following special offers:

• Buy One Get One Free on Apples
• Three For The Price Of Two on Watermelons

We would like to see the output for an example basket 🛒 containing the following items:

Item	Quantity
🍎 Apple	4
🍊 Orange	3
🍉 Watermelon	5

Notes

• There is no requirements for any user interface - a command-line program is fine
• You can use any programming language that you like

Highlights

• Applied Test-Driven Development;
• Used Strategy Pattern for the discounts, etc.;
• Did have to refactor midway through because I did not understood "Buy 1 Get 1 Free" correctly, but it was easy with the existing 100% code coverage and good architecture given as a bonus of doing TDD;
• Used Jest as a test runner;
• made it in less than 2 hours.
• Maybe I should have given the total discount instead of the total resulting price to enable the UI to give more insights to the end-user, but it can be quickly added given the architecture & code-coverage: refactoring or adding features is easy and safe!

Next Steps

This is a finished project, but I did continue to play around to test Github Actions to setup a CI/CD to build, test, and report code coverage.

Also added a few README badges along the way.

• Added a Travis CI build (install, test, etc.) see .travis.yml file CI replaced with Github Actions
• with code coverage reporting via Coveralls
• and dependency vulnerability analysis via Snyk
• and code quality analysis via Code Climate
• mutation testing with Stryker, which helped me refine tests and unused code.

Also, to compare with I added a Github Actions Workflow that almost does the same (see .github/main.workflow file):

• install
• test
• start
• check prettier
• report code coverage

(Still missing the Code Climate integration)

LICENSE

See LICENSE