# Copyright 2013-2017 DataStax, Inc.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

try:

import unittest2 as unittest

except ImportError:

import unittest # noqa

from cassandra.cqlengine import connection

from cassandra.query import dict_factory

from mock import Mock

class ConnectionTest(unittest.TestCase):

no_registered_connection_msg = "doesn't exist in the registry"

def setUp(self):

super(ConnectionTest, self).setUp()

self.assertFalse(

connection._connections,

'Test precondition not met: connections are registered: {cs}'.format(cs=connection._connections)

)

def test_set_session_without_existing_connection(self):

"""

Users can set the default session without having a default connection set.

"""

mock_session = Mock(

row_factory=dict_factory,

encoder=Mock(mapping={})

)

connection.set_session(mock_session)

def test_get_session_fails_without_existing_connection(self):

"""

Users can't get the default session without having a default connection set.

"""

with self.assertRaisesRegexp(connection.CQLEngineException, self.no_registered_connection_msg):

connection.get_session(connection=None)

def test_get_cluster_fails_without_existing_connection(self):

"""

Users can't get the default cluster without having a default connection set.

"""

with self.assertRaisesRegexp(connection.CQLEngineException, self.no_registered_connection_msg):

connection.get_cluster(connection=None)