mongo-test.js

const { MongoMemoryServer } = require('mongodb-memory-server');

async function connect() {
  const mongoConnection = new MongoMemoryServer({ debug: true });

  const status = mongoConnection.getInstanceInfo();
  console.log(status);

  const connectionString = await mongoConnection.getConnectionString();
  console.log('=================================================================================');
  console.log(connectionString);
  console.log('=================================================================================');
}

try {
  connect().then(() => {
    console.log('done');
  });
} catch (e) {
  console.error(e);
}