'use strict';

const { MongoClient } = require('mongodb');

void async function main() {
  const client = await MongoClient.connect('mongodb://localhost:27017/test', {
    useNewUrlParser: true,
    useUnifiedTopology: true
  });

  client.on('close', () => console.log('Got close'));

  await client.close();

  await new Promise(resolve => setTimeout(resolve, 100));
  console.log('Done');
}();