medium-db-setup.js

db-setup.js

// db-setup.js
const path = require('path')
const fs = require('fs')
const { MongoMemoryServer } = require('mongodb-memory-server')
const driver = require('../../src/store/driver')
const initializeDb = require('../initialize-db')

const globalConfigPath = path.join(__dirname, 'globalConfig.json')

const mongod = new MongoMemoryServer({
  autoStart: false
})

module.exports = async function dbSetup () {
  if (!mongod.isRunning) {
    await mongod.start()
  }

  const mongoConfig = {
    mongoDBName: 'jest',
    mongoUri: await mongod.getConnectionString()
  }

  await driver.connect(mongoConfig.mongoUri)
  await initializeDb()

  // Write global config to disk because all tests run in different contexts.
  fs.writeFileSync(globalConfigPath, JSON.stringify(mongoConfig))

  // Set reference to mongod in order to close the server during teardown.
  global.__MONGOD__ = mongod
}