node-mongod-runner

Nodejs runner for mongod with ephemeralForTest storage type and guaranteed listening port. The process will be stopped on SIGINT or SIGTERM signals.

Usage

const mongodRunner = require('node-mongod-runner');
const mongodb = require('mongodb');

mongodRunner().then(({ connectionUri }) => {
  return mongodb.connect(`${connectionUri}/test_db`);
})

• Passing some suggestion for port:

  mongodRunner({
    port: 27101,
  })

  If the port is not free a random one will be generated and returned.

• Listening only on localhost:

  mongodRunner({
    host: 'localhost',
  })

• Use a different version of MongoDB:

  mongodRunner({
    version: '3.2.0',
  })

  This might take a while because it needs to download the mongod binary. So, if used in Mocha tests you need to consider setting a timeout.

Default configuration

{
  "port": 27017,
  "host": "0.0.0.0"
}

API

mongodRunner({ port, host, version })

Returns a promise that will resolve an object containing connectionUri and port.

// result
{
  connectionUri // 'mongodb://0.0.0.0:44444'
  port          // the generated port Eg.: 44444
  kill          // method to kill mongod process
}

mongoRunner.createMongoClient({ connectionUri })

It takes a connectionUri and it creates a mongodb connection to a random database. It returns a Promise that will resolve to an object containing the connectionUri that includes the random generated database name.

// result
{
  connectionUri // the connection uri with a randomly generated db name Eg.: 'mongodb://0.0.0.0:44444/test-db-a743afc5-1571-486a-b26b-982f40f27c32'
  mongoClient   // a mongodb client connection
}