andreirailean / shopping-cart-sample

Running the code

npm install

npm test

Requirements

nodejs version 6.5

About the code

All code is in ./src directory

Code is written as a library. There's no command-line runnable component that accepts input.

Please see *.spec.js files in ./src to understand usage.

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Implementation Assumptions

Customer's first purchase date is used for "Customer for over 2 years" calculations. Customer matching this criteria is called "Loyal Customer" in code

Volume discount ($5 for every $100) is not considered to be a percentage based discount and is applied in addition to percentage based discount.

All individual discounts are calculated based on full price bill subtotal.

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Challenge

On a retail website, the following discounts apply:

1. If the user is an employee of the store, he gets a 30% discount
2. If the user is an affiliate of the store, he gets a 10% discount
3. If the user has been a customer for over 2 years, he gets a 5% discount
4. For every $100 on the bill, there would be a $ 5 discount (e.g. for $ 990, you get $ 45 as a discount)
5. The percentage based discounts do not apply on groceries
6. A user can get only one of the percentage based discounts on a bill.

Write a program with test cases such that given a bill, it finds the net payable amount. Please note the stress is on object oriented approach and test coverage.