Overview

My solution to the SecondGenCodingProblem using Javascript, Node, and Jasmine.

Setup & run via console

Install Node & NPM

To run program via console:

$ node main.js inputs/input-01.txt   // sample input file

To run Jasmine unit tests:

$ npm install   // install Jasmine dependendies, node_modules folder (one-time)
$ npm test      // execute unit tests in console using Jasmine CLI

Development

Main.js

• Keep the executable small. Let a utility class handle the grunt work.

CustomerOrderHistory.js

• Sole utility class to handle the grunt work of object mapping, order filtering, and product output sorting.

Domain Modeling

Object	Properties	Purpose
ProductOrderSummary	ProductName, Quantity, Cost	Model data for each output line
Product	Name, UnitPrice	Model input data for each PRODUCT line
Order	Date, LineItems	Model input data for each ORDER line
LineItem	ProductName, Quantity	Sub-model input data for each ORDER line

Unit Testing

• Jasmine framework + Jasmine CLI test runner (simple, gets the job done)
• Specs bunched together in same "neighborhood" as tested code

Acceptance Testing

• Manual smoke testing using sample input files (e.g., inputs/input-01.txt)
• Notable considerations:
  1. Unit Price - Maintain two decimal places from input, to calculations, to output.
  2. Order Date - Orders before year 2000 are not included in output calculations.
  3. Sorting - Output displays product lines ordered by quantity, high to low.

Assumptions

• Input files are formatted correctly (no null exceptions)