Storing and retrieving data

Let's work with a test suite that I wrote to help make sure that our MongoDB connection is a bit more robust and includes inserting data into the database and then testing to be sure it exists:

1. Examine test/setup.model.test.js:

const MongoDB = require('../models/mongo')
const insertRandomNames = require('../models/setup')

describe('insert', () => {
 let db

 beforeAll(async () => {
   db = await MongoDB.connectDB('test')
 })

 afterAll(async (done) => {
   await db.collection('names').deleteMany({})
   await MongoDB.disconnectDB()
   done()
 })

 it('should insert the random names', async () => {
   await insertRandomNames()

   const names = await db.collection("names").find().toArray()
   expect(names.length).toBeGreaterThan(0)
 })

})

2. If we run node_modules/.bin/jest setup, we'll see success because the insertRandomNames() method exists from our setup model. So let's take a look...