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# sAsync:
# An enhancement to the SQLAlchemy package that provides persistent
# dictionaries, text indexing and searching, and an access broker for
# conveniently managing database access, table setup, and
# transactions. Everything can be run in an asynchronous fashion using the
# Twisted framework and its deferred processing capabilities.
#
# Copyright (C) 2006 by Edwin A. Suominen, http://www.eepatents.com
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the file COPYING for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
"""
Unit tests for ORM aspects of sasync.database.py.
"""
from twisted.internet import reactor, defer
from twisted.trial.unittest import TestCase
import sqlalchemy as SA
from sqlalchemy.orm import mapper, relation
from sasync.database import AccessBroker, transact
VERBOSE = False
DELAY = 0.5
DB_URL = 'sqlite:///database.db'
# DEBUG
if VERBOSE:
import logging
logging.basicConfig()
logging.getLogger('sqlalchemy.engine').setLevel(logging.DEBUG)
def deferToDelay(result, delay=0.1):
d = defer.Deferred()
reactor.callLater(delay, d.callback, result)
return d
class User(object):
def __init__(self, user_name, password):
self.user_name = user_name
self.password = password
class Address(object):
def __init__(self, street, city, state, zip):
self.street = street
self.city = city
self.state = state
self.zip = zip
class ObjectBroker(AccessBroker):
"""
From the example at U{http://www.sqlalchemy.org/docs/datamapping.myt}
"""
def __getattribute__(self, name):
# For debugging, to see what session is stored
result = AccessBroker.__getattribute__(self, name)
if VERBOSE and name == 'session':
print "SESSION:", result
return result
def startup(self):
def gotTables(null):
r = relation(
Address, backref='user', cascade="all, delete, delete-orphan")
mapper(User, self.users, properties={'addresses':r})
mapper(Address, self.addresses)
d = self.table(
'users',
SA.Column('user_id', SA.Integer, primary_key=True),
SA.Column('user_name', SA.String(16)),
SA.Column('password', SA.String(20))
)
d.addCallback(lambda _: self.table(
'addresses',
SA.Column('address_id', SA.Integer, primary_key=True),
SA.Column('user_id', SA.Integer, SA.ForeignKey("users.user_id")),
SA.Column('street', SA.String(100)),
SA.Column('city', SA.String(80)),
SA.Column('state', SA.String(2)),
SA.Column('zip', SA.String(10))
))
d.addCallback(gotTables)
return d
@transact
def clear(self):
for obj in self.session:
self.session.delete(obj)
@transact
def setJane(self):
u = User('jane', 'hihilala')
u.addresses.append(
Address('123 anywhere street', 'big city', 'UT', '76543'))
u.addresses.append(
Address('1 Park Place', 'some other city', 'OK', '83923'))
self.session.save(u)
@transact
def setTarzan(self):
u = User('tarzan', 'ugh')
u.addresses.append(
Address('234 another street', 'big city', 'UT', '76543'))
u.addresses.append(
Address('345 Zoo Circle', 'New York', 'NY', '32145'))
self.session.save(u)
@transact
def getResidents(self, state):
users = self.session.query(User).join('addresses').filter_by(state=state)
return [x.user_name for x in users]
@transact
def getTarzan(self):
return self.session.query(User).filter_by(user_name='tarzan').one()
@transact
def getJane(self):
return self.session.query(User).filter_by(user_name='jane').one()
@transact
def deleteUser(self, user):
self.session.delete(user)
class TestORM(TestCase):
def setUp(self):
self.broker = ObjectBroker(DB_URL)
def tearDown(self):
def cleared(null):
self.broker.session.close()
SA.orm.clear_mappers()
d = self.broker.clear(session=True)
d.addCallback(cleared)
return d
def test_query_bothStates(self):
d = self.broker.setJane(session=True)
d = self.broker.setTarzan(session=True)
d.addCallback(lambda _: self.broker.getResidents('UT', session=True))
d.addCallback(self.failUnlessEqual, ['jane', 'tarzan'])
return d
def test_query_oneState(self):
d = self.broker.setJane(session=True)
d = self.broker.setTarzan(session=True)
d.addCallback(lambda _: self.broker.getResidents('OK', session=True))
d.addCallback(self.failUnlessEqual, ['jane'])
return d
def testRepeatedQueries(self):
d = self.broker.setJane(session=True)
d = self.broker.setTarzan(session=True)
d.addCallback(lambda _: self.broker.getResidents('UT', session=True))
d.addCallback(self.failUnlessEqual, ['jane', 'tarzan'])
d.addCallback(lambda _: self.broker.getResidents('OK', session=True))
d.addCallback(self.failUnlessEqual, ['jane'])
return d
@defer.deferredGenerator
def testDeleteUser(self):
# Setup Tarzan & Jane
wfd = defer.waitForDeferred(self.broker.setJane(session=True))
yield wfd; wfd.getResult()
wfd = defer.waitForDeferred(self.broker.setTarzan(session=True))
yield wfd; wfd.getResult()
# Delete Jane
wfd = defer.waitForDeferred(self.broker.getJane(session=True))
yield wfd
user = wfd.getResult()
wfd = defer.waitForDeferred(self.broker.deleteUser(user, session=True))
yield wfd; wfd.getResult()
# Make sure only Tarzan is listed for a Utah address
wfd = defer.waitForDeferred(self.broker.getResidents('UT', session=True))
yield wfd
self.failUnlessEqual(wfd.getResult(), ['tarzan'])
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