# copyright 2013-2013 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.dbapi"""

from cubicweb.devtools.testlib import CubicWebTC

from cubicweb import ProgrammingError

from cubicweb.repoapi import ClientConnection

class REPOAPITC(CubicWebTC):

    def test_clt_cnx_basic_usage(self):

        """Test that a client connection can be used to access the data base"""

        cltcnx = ClientConnection(self.session)

        with 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 implicite rollback

            random_user = rset.get_entity(0, 0)

            random_user.cw_set(surname=u'celestine')

        # implicite rollback on exit

        rset = self.session.execute('''Any X WHERE X is CWUser,

                                                 X surname "babar"

                                    ''')

        self.assertTrue(rset)

    def test_clt_cnx_life_cycle(self):

        """Check that ClientConnection requires explicite open and  close

        """

        cltcnx = ClientConnection(self.session)

        # 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')