FongX777

const { Shop, Item, SpecialItemName } = require('../src/gilded_rose');

const { ITEM_AGED_BRIE, ITEM_SULFURAS, ITEM_BACKSTAGE_PASS } = SpecialItemName;

describe('Gilded Rose', function() {
  it('the item foo should degrade both its quality and sellIn day', function() {
    const gildedRose = new Shop([new Item('foo', 10, 10)]);
    const items = gildedRose.updateQuality();
    const testItem = items[0];
    expect(testItem.name).toBe('foo');

FongX777

e-commerce
├── catalog
│   ├── applicationService
│   │   ├── AddProduct.ts
│   │   ├── DeleteProduct.ts
│   │   └── UpdateProduct.ts
│   ├── domain
│   │   ├── event
│   │   │   ├── ProductCreated.ts
│   │   │   └── ProductUpdated.ts

FongX777

/**
 * @param {number[]} nums 
 * @returns {Left|Right}
 */
function sumPositiveNums(nums) {
  if (nums.some(num => !Number.isInteger(num))) {
    return Left.of({ code: 501, msg: 'All numbers should be integer' });
  }
  if (nums.some(num => num <= 0)) {
    return Left.of({ code: 502, msg: 'All numbers should be positive'});

FongX777

/**
 * ---------------------------
 * Domain Layer
 * ---------------------------
 */
class Order {
  /**
   *
   * @param {Object} prop
   * @param {string} prop.id

FongX777

const { ApolloServer, gql } = require('apollo-server')
const DataLoader = require('dataloader')
const sqlite3 = require('sqlite3').verbose()
const db = new sqlite3.Database(':memory:')
const { promisify } = require('util')
db.get = promisify(db.get)
db.all = promisify(db.all)

// run in serial
db.serialize(function () {