Account for new psycopg2 exception classes mapping
From psycopg2 >= 2.8, specific exceptions are raised corresponding to
postgresql errors. E.g. a CheckViolation exception is raised instead of
a generic IntegrityError previously when a constraint violation occurs.
The way we intercept database errors, especially for constraint
violation, is not compliant with that because we do not catch subclasses
of IntegrityError in native source's doexec() method.
We fix this by checking for the presence of IntegrityError error in
exception class's mro. This is still overcomplicated and clumsy, because
we still use string comparison, but this is the best we can do as far as
I know. (A better fix would be 'isinstance(ex, IntegrityError)' but we
have no engine-independent error classes, so this is not possible.
Something like sqlalchemy's DBAPI Errors [1] might help:
https://docs.sqlalchemy.org/en/latest/errors.html#dbapi-errors)
# copyright 2013-2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb 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 GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""unittest for cubicweb.repoapi"""
from cubicweb.devtools.testlib import CubicWebTC
from cubicweb import ProgrammingError
from cubicweb.repoapi import Connection, connect, anonymous_cnx
class REPOAPITC(CubicWebTC):
def test_cnx_basic_usage(self):
"""Test that a client connection can be used to access the database"""
with self.admin_access.client_cnx() as cltcnx:
# (1) some RQL request
rset = cltcnx.execute('Any X WHERE X is CWUser')
self.assertTrue(rset)
# (2) ORM usage
random_user = rset.get_entity(0, 0)
# (3) Write operation
random_user.cw_set(surname=u'babar')
# (4) commit
cltcnx.commit()
rset = cltcnx.execute('''Any X WHERE X is CWUser,
X surname "babar"
''')
self.assertTrue(rset)
# prepare test for implicit rollback
random_user = rset.get_entity(0, 0)
random_user.cw_set(surname=u'celestine')
# implicit rollback on exit
with self.admin_access.client_cnx() as cltcnx:
rset = cltcnx.execute('''Any X WHERE X is CWUser,
X surname "babar"
''')
self.assertTrue(rset)
def test_cnx_life_cycle(self):
"""Check that ClientConnection requires explicit open and close
"""
access = self.admin_access
cltcnx = Connection(access._repo, access._user)
# connection not open yet
with self.assertRaises(ProgrammingError):
cltcnx.execute('Any X WHERE X is CWUser')
# connection open and working
with cltcnx:
cltcnx.execute('Any X WHERE X is CWUser')
# connection closed
with self.assertRaises(ProgrammingError):
cltcnx.execute('Any X WHERE X is CWUser')
def test_connect(self):
"""check that repoapi.connect works and returns a usable connection"""
cnx = connect(self.repo, login='admin', password='gingkow')
self.assertEqual('admin', cnx.user.login)
with cnx:
rset = cnx.execute('Any X WHERE X is CWUser')
self.assertTrue(rset)
def test_anonymous_connect(self):
"""check that you can get anonymous connection when the data exist"""
cnx = anonymous_cnx(self.repo)
self.assertEqual('anon', cnx.user.login)
with cnx:
rset = cnx.execute('Any X WHERE X is CWUser')
self.assertTrue(rset)
def test_cnx_has_lang(self):
"""check that client and repo cnx have .lang set"""
with self.admin_access.client_cnx() as cnx:
self.assertEqual(cnx.lang, 'en')
with self.admin_access.repo_cnx() as cnx:
self.assertEqual(cnx.lang, 'en')
if __name__ == '__main__':
from logilab.common.testlib import unittest_main
unittest_main()