Find file
Fetching contributors…
Cannot retrieve contributors at this time
113 lines (78 sloc) 2.48 KB

Mongo Box

Mongo Box helps starting and stopping sandboxed MongoDB instance from within a Python process. MongoDB instance is created with a temporary directory to store database file and is configured to be as lightweight as possible. It will choose a free port on localhost, so it will not interfere with default MongoDB processes. It is primarily expected to be used in unit tests and for prototyping concepts.

A typical use of a Mongo Box:

from mongobox import MongoBox

box = MongoBox()

client = box.client() # pymongo client 
assert client.alive()

# do stuff with Mongo

assert not client.alive()

Nose 1

Mongo Box comes with a Nose plugin which is automatically installed. If used as a plugin, port of the running instance will be exported in environment variable MONGOBOX_PORT. This name can be overridden in settings.

The plugin exposes several configuration options. To see them, run:

nosetests --help

The options you are interested in start with --mongobox-.

Nose 2

nose2.cfg should look similar to this:

plugins = mongobox.nose2_plugin

# Optionally specify the path to the mongod executable
# bin =
# Optionally specify the port to run mongodb on
# port =
# Optionally enable mongodb script engine
# scripting = True
# Path to database files directory. Creates temporary directory by default
# dbpath =
# Optionally store the mongodb log here (default is /dev/null)
# logpath =
# Optionally preallocate db files
# prealloc = True
# Which environment variable port number will be exported to
port_envvar = MONGOBOX_PORT

Unit tests

For an easy unit tests integration there is a MongoTestCase class inherited from unittest.TestCase. It assumes tests are run from nosetests with --with-mongobox flag. MongoTestCases provides a pymongo client connected to the sandboxed mongo instance and a purge_database helper to clean up the database after every test:

from mongobox.unittest import MongoTestCase

class MyTest(MongoTestCase):
    def setUp(self):

    def tearDown(self):


Get it from PyPi:

pip install mongobox

Get it from GitHub:

pip install


Roman Kalyakin


MongoBox is based on mongonose nose plugin by Kapil Thangavelu.

For a list of contributors see