'use strict'; run().catch(error => { console.error(error); process.exit(-1); }); async function run() { const ReplSet = require('mongodb-memory-server').MongoMemoryReplSet; // Create new instance const replSet = new ReplSet({ binary: { version: process.argv[2] }, instanceOpts: [ // Set the expiry job in MongoDB to run every second { port: 27017, args: ['--setParameter', 'ttlMonitorSleepSecs=1'] } ], dbName: 'mongoose_test', replSet: { name: 'rs0', count: 2, storageEngine: 'wiredTiger' } }); await replSet.start(); await replSet.waitUntilRunning(); console.log('MongoDB-ReplicaSet is now running.'); console.log(replSet.getUri('mongoose_test')); }