[TIP] context manager and setUp/tearDown

andrea crotti andrea.crotti.0 at gmail.com
Mon Feb 11 02:38:35 PST 2013

I created a context manager to create a temporary database to play
around in couchdb, like this:

__metaclass__ = type
Utilities functions manipulate the database

from couchdbkit import Server

TEMP_DB = 'unit_test_database'
LOCAL_URI = 'http://localhost:5984'

class TemporaryDb:
    def __init__(self):
        self.server = Server(LOCAL_URI)

    def _remove_if_there(self):
        if TEMP_DB in self.server.all_dbs():

    def __enter__(self):
        return self.server.create_db(TEMP_DB)

    def __exit__(self, type, value, traceback):

Now I want to use it in my unit tests, and I have a "problem" which I
already saw other times, how do I use it nicely with setUp/tearDown?

This basically works but I don't like it very much..

class TestCouchOo(unittest.TestCase):
    """Create a CouchObject and test storing the various values
    def setUp(self):
        self.temp = TemporaryDb()
        self.db = self.temp.__enter__()

    def tearDown(self):
        self.temp.__exit__(None, None, None)

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