Class Admin

const MongoClient = require('mongodb').MongoClient;
const test = require('assert');
// Connection url
const url = 'mongodb://localhost:27017';
// Database Name
const dbName = 'test';

// Connect using MongoClient
MongoClient.connect(url, function(err, client) {
  // Use the admin database for the operation
  const adminDb = client.db(dbName).admin();

  // List all the available databases
  adminDb.listDatabases(function(err, dbs) {
    expect(err).to.not.exist;
    test.ok(dbs.databases.length > 0);
    client.close();
  });
});