Registry / testing / mongodb-memory-server-global-4.2

mongodb-memory-server-global-4.2

library11.2.0jsnpmunverified

A sub-package of mongodb-memory-server that automatically downloads a MongoDB 4.2 binary for testing purposes. Version 11.2.0 is current; releases follow mongodb-memory-server core with weekly or monthly cadence. It eliminates the need to manually manage mongod binaries for CI/CD and local test environments. Unlike mongodb-memory-server-core, this package includes the binary download as a postinstall step, making setup effortless. Supports TypeScript with bundled type declarations. Requires Node >=20.19.0 and is ESM-only since v9+. Key differentiator: pre-pinned version (4.2) avoiding version drift in tests.

testing

npm install mongodb-memory-server-global-4.2

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · MONGODB-MEMORY-SER

mongodb-memory-server-global-4.2

testingjavascriptv11.2.0

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

MongoMemoryServer

✓ import { MongoMemoryServer } from 'mongodb-memory-server-core'

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

ESM-only since v9; CommonJS require will fail. Use default import if you must use require.

MongoMemoryServer (default)

✓ import MongoMemoryServer from 'mongodb-memory-server-core'

✗ const MongoMemoryServer = require('mongodb-memory-server-core')

Default import is deprecated since v8; use named import instead.

MongoMemoryReplSet

✓ import { MongoMemoryReplSet } from 'mongodb-memory-server-core'

Also ESM-only. Ensure tsconfig has 'moduleResolution': 'node16' or 'bundler'.

Creates an in-memory MongoDB 4.2 instance, outputs connection URI, and stops it.

import { MongoMemoryServer } from 'mongodb-memory-server-core'; const mongod = await MongoMemoryServer.create(); const uri = mongod.getUri(); console.log('MongoDB URI:', uri); const db = await mongod.getDbName(); console.log('DB name:', db); // Use uri to connect with mongoose or mongodb driver await mongod.stop();

Debug

Known issues

breakingDefault import of MongoMemoryServer was removed in v9.

fix

Use named import: import { MongoMemoryServer } from 'mongodb-memory-server-core'

affects: >=9.0.0

breakingasync create() no longer accepts instance options; use create(options) instead.

fix

Pass options as argument: await MongoMemoryServer.create({ instance: { port: 27017 } })

affects: >=9.0.0

deprecatedgetUri() and getDbName() are deprecated; use uri and dbName properties after instance creation.

fix

Access mongod.uri instead of mongod.getUri() and mongod.dbName instead of mongod.getDbName()

affects: >=10.0.0

breakingMongoMemoryServer no longer accepts new keyword; use create() static method.

fix

Use await MongoMemoryServer.create() instead of new MongoMemoryServer()

affects: >=9.0.0

gotchaBinary download may fail behind corporate proxies or in restrictive CI environments.

fix

Set HTTP_PROXY/HTTPS_PROXY environment variables or pre-download binary and set MONGOMS_SYSTEM_BINARY.

affects: >=0

breakingNode.js >=20.19.0 required; older versions will not work.

fix

Upgrade Node.js to version 20.19.0 or later.

affects: >=11.0.0

deprecatedallowUseCmd and useCmd options are deprecated.

fix

Remove these options; they are no longer needed.

affects: >=10.0.0

Errors

Common errors & fixes

Error: Cannot find module 'mongodb-memory-server-core'

Missing peer dependency mongodb-memory-server-core or incorrect import from subpackage.

fix

Install mongodb-memory-server-core: npm install mongodb-memory-server-core

TypeError: mongod.getUri is not a function

Using deprecated getUri() in version 10+ where it was removed.

fix

Use mongod.uri property instead.

Error: This module is ESM-only. To use it, you must use ESM imports or dynamic imports.

Using CommonJS require() with version 9+.

fix

Switch to ESM import (import { MongoMemoryServer } from 'mongodb-memory-server-core') or set type: module in package.json.

Error: Failed to download mongod binary version 4.2.0

Network issue or missing system dependencies (like libcurl).

fix

Check internet connection, set proxy variables, or use MONGOMS_SYSTEM_BINARY to point to a pre-installed binary.

TypeError: (intermediate value).create is not a constructor

Using default import instead of named import in v9+.

fix

Use import { MongoMemoryServer } from 'mongodb-memory-server-core'

Upgrade

Version history

11.2.0latest on npm

Audit

Dependencies

mongodb-memory-server-corerequiredProvides the core logic for starting/stopping in-memory MongoDB instances.

mongodb-memory-server-corerequiredThe actual mongod binary is downloaded during core's postinstall step.

Agent activity

15 hits · last 30 days

node

Resources

githubhttps://github.com/typegoose/mongodb-memory-server ↗

packagemongodb-memory-server-global-4.2 ↗

homepagehttps://github.com/typegoose/mongodb-memory-server ↗