npm i axios --save

const axios = require('axios')

axios
  .get('https://www.egencia.com/flight-service/base/version')
  .then(response => {
    console.log(response.data)
  })

const axios = require('axios')

axios
  .post('http://localhost:3000/services', {
    env: 'maui',
    service_name: 'flight-service',
  })
  .then(response => {
    console.log(response.data)
  })

docker run -p 27017:27017 mongo:latest

const mongoose = require('mongoose')

mongoose.connect('mongodb://localhost:27017/database', {
  useNewUrlParser: true,
})

const baseVersionSchema = new mongoose.Schema({
  service_name: String,
  build_version: String,
})

const BaseVersionModel = mongoose.model('BaseVersion', baseVersionSchema)

const baseVersion = new BaseVersionModel({
  service_name: 'flight-service',
  build_version: '2019',
})

baseVersion.save().then(() => {
  console.log('saved')
})

const mongoose = require('mongoose')

mongoose.connect('mongodb://localhost:27017/database', {
  useNewUrlParser: true,
})

const baseVersionSchema = new mongoose.Schema({
  service_name: String,
  build_version: String,
})

const BaseVersionModel = mongoose.model('BaseVersion', baseVersionSchema)

BaseVersionModel.find()
  .lean() // necessary for json output
  .then(data => {
    console.log(data)
  })

npm i --save-dev jest supertest
npm i --save-dev eslint-plugin-jest

// in package.json add this section
"jest": {
    "testEnvironment": "node"
  }

// in .eslintrc.js, add plugins:
'plugin:jest/recommended'

const app = require('../src/app')
const request = require('supertest')

it('should return hello world', async function() {
  const response = await request(app).get('/hello-world')
  expect(response.text).toEqual('hello world')
})

npm install mongodb-memory-server --save-dev

const { MongoMemoryServer } = require('mongodb-memory-server')
const app = require('../../src/app')
const request = require('supertest')
const mongoose = require('mongoose')

let mongod

beforeEach(async () => {
  mongod = new MongoMemoryServer()
  const uri = await mongod.getConnectionString()
  await mongoose.connect(uri)
})

afterEach(async () => {
  mongod.stop()
})

npm install nock --save-dev

nock('https://www.egencia.com')
  .get('/flight-service/base/version')
  .reply(200, {
    application_name: 'flight-service',
    active_profiles: 'prod,prodch,ancillaries,oms',
    stage: 'prod',
    machine_name: 'chexjvgect004',
    application_data: {
      step_bom_version: '8.6.2',
    },
    build_version: '2019-05-27-15-15-94093f32a',
    build_number: '94093f32a449b31104c7c2767ee5fd2a42447b99',
    build_date: '2019-05-27T15:17:025Z',
  })
  .persist()