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mongodb-memory-server

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mongodb-memory-server

MongoDB Server for testing (auto-download latest version). The server will allow you to connect your favourite ODM or client library to the MongoDB Server and run parallel integration tests isolated from each other.

  • 10.1.2
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increased by13.63%
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What is mongodb-memory-server?

The mongodb-memory-server package provides an in-memory MongoDB server for testing purposes. It allows developers to run MongoDB instances without needing to install MongoDB on their local machine, making it ideal for unit tests and CI environments.

What are mongodb-memory-server's main functionalities?

Start an in-memory MongoDB server

This code demonstrates how to start an in-memory MongoDB server using mongodb-memory-server and connect to it using Mongoose. The server runs entirely in memory, making it fast and ideal for testing.

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

(async () => {
  const mongod = new MongoMemoryServer();
  const uri = await mongod.getUri();

  await mongoose.connect(uri, { useNewUrlParser: true, useUnifiedTopology: true });
  console.log('MongoDB in-memory server started');

  // Your code here

  await mongoose.disconnect();
  await mongod.stop();
})();

Use with Jest for testing

This code shows how to integrate mongodb-memory-server with Jest for testing. It sets up the in-memory MongoDB server before all tests and tears it down after all tests, ensuring a clean state for each test run.

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

let mongod;

beforeAll(async () => {
  mongod = new MongoMemoryServer();
  const uri = await mongod.getUri();
  await mongoose.connect(uri, { useNewUrlParser: true, useUnifiedTopology: true });
});

afterAll(async () => {
  await mongoose.disconnect();
  await mongod.stop();
});

// Your tests here

Create and use collections

This code demonstrates how to create and use collections with mongodb-memory-server. It defines a Mongoose model, saves a document, and retrieves all documents from the collection.

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

(async () => {
  const mongod = new MongoMemoryServer();
  const uri = await mongod.getUri();

  await mongoose.connect(uri, { useNewUrlParser: true, useUnifiedTopology: true });

  const Cat = mongoose.model('Cat', { name: String });
  const kitty = new Cat({ name: 'Zildjian' });
  await kitty.save();
  console.log('Cat saved:', kitty);

  const cats = await Cat.find();
  console.log('All cats:', cats);

  await mongoose.disconnect();
  await mongod.stop();
})();

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Package last updated on 11 Oct 2024

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