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# Copyright 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.
import unittest
from unittest.mock import Mock, patch
from cassandra.connection import DefaultEndPoint
try:
from twisted.test import proto_helpers
from twisted.python.failure import Failure
from cassandra.io import twistedreactor
from cassandra.io.twistedreactor import TwistedConnection
except ImportError:
twistedreactor = TwistedConnection = None # NOQA
from cassandra.connection import _Frame
from tests.unit.io.utils import TimerTestMixin
class TestTwistedTimer(TimerTestMixin, unittest.TestCase):
"""
Simple test class that is used to validate that the TimerManager, and timer
classes function appropriately with the twisted infrastructure
"""
connection_class = TwistedConnection
@property
def create_timer(self):
return self.connection.create_timer
@property
def _timers(self):
return self.connection._loop._timers
def setUp(self):
if twistedreactor is None:
raise unittest.SkipTest("Twisted libraries not available")
twistedreactor.TwistedConnection.initialize_reactor()
super(TestTwistedTimer, self).setUp()
class TestTwistedProtocol(unittest.TestCase):
def setUp(self):
if twistedreactor is None:
raise unittest.SkipTest("Twisted libraries not available")
twistedreactor.TwistedConnection.initialize_reactor()
self.tr = proto_helpers.StringTransportWithDisconnection()
self.tr.connector = Mock()
self.mock_connection = Mock()
self.obj_ut = twistedreactor.TwistedConnectionProtocol(self.mock_connection)
self.tr.protocol = self.obj_ut
def tearDown(self):
loop = twistedreactor.TwistedConnection._loop
if not loop._reactor_stopped():
loop._cleanup()
def test_makeConnection(self):
"""
Verify that the protocol class notifies the connection
object that a successful connection was made.
"""
self.obj_ut.makeConnection(self.tr)
self.assertTrue(self.mock_connection.client_connection_made.called)
def test_receiving_data(self):
"""
Verify that the dataReceived() callback writes the data to
the connection object's buffer and calls handle_read().
"""
self.obj_ut.makeConnection(self.tr)
self.obj_ut.dataReceived('foobar')
self.assertTrue(self.mock_connection.handle_read.called)
self.mock_connection._iobuf.write.assert_called_with("foobar")
class TestTwistedConnection(unittest.TestCase):
def setUp(self):
if twistedreactor is None:
raise unittest.SkipTest("Twisted libraries not available")
twistedreactor.TwistedConnection.initialize_reactor()
self.reactor_cft_patcher = patch(
'twisted.internet.reactor.callFromThread')
self.reactor_run_patcher = patch('twisted.internet.reactor.run')
self.mock_reactor_cft = self.reactor_cft_patcher.start()
self.mock_reactor_run = self.reactor_run_patcher.start()
self.obj_ut = twistedreactor.TwistedConnection(DefaultEndPoint('1.2.3.4'),
cql_version='3.0.1')
def tearDown(self):
self.reactor_cft_patcher.stop()
self.reactor_run_patcher.stop()
def test_connection_initialization(self):
"""
Verify that __init__() works correctly.
"""
self.mock_reactor_cft.assert_called_with(self.obj_ut.add_connection)
self.obj_ut._loop._cleanup()
self.mock_reactor_run.assert_called_with(installSignalHandlers=False)
def test_client_connection_made(self):
"""
Verifiy that _send_options_message() is called in
client_connection_made()
"""
self.obj_ut._send_options_message = Mock()
self.obj_ut.client_connection_made(Mock())
self.obj_ut._send_options_message.assert_called_with()
@patch('twisted.internet.reactor.connectTCP')
def test_close(self, mock_connectTCP):
"""
Verify that close() disconnects the connector and errors callbacks.
"""
transport = Mock()
self.obj_ut.error_all_requests = Mock()
self.obj_ut.add_connection()
self.obj_ut.client_connection_made(transport)
self.obj_ut.is_closed = False
self.obj_ut.close()
self.assertTrue(self.obj_ut.connected_event.is_set())
self.assertTrue(self.obj_ut.error_all_requests.called)
def test_handle_read__incomplete(self):
"""
Verify that handle_read() processes incomplete messages properly.
"""
self.obj_ut.process_msg = Mock()
self.assertEqual(self.obj_ut._iobuf.getvalue(), b'') # buf starts empty
# incomplete header
self.obj_ut._iobuf.write(b'\x84\x00\x00\x00\x00')
self.obj_ut.handle_read()
self.assertEqual(self.obj_ut._io_buffer.cql_frame_buffer.getvalue(), b'\x84\x00\x00\x00\x00')
# full header, but incomplete body
self.obj_ut._iobuf.write(b'\x00\x00\x00\x15')
self.obj_ut.handle_read()
self.assertEqual(self.obj_ut._io_buffer.cql_frame_buffer.getvalue(),
b'\x84\x00\x00\x00\x00\x00\x00\x00\x15')
self.assertEqual(self.obj_ut._current_frame.end_pos, 30)
# verify we never attempted to process the incomplete message
self.assertFalse(self.obj_ut.process_msg.called)
def test_handle_read__fullmessage(self):
"""
Verify that handle_read() processes complete messages properly.
"""
self.obj_ut.process_msg = Mock()
self.assertEqual(self.obj_ut._iobuf.getvalue(), b'') # buf starts empty
# write a complete message, plus 'NEXT' (to simulate next message)
# assumes protocol v3+ as default Connection.protocol_version
body = b'this is the drum roll'
extra = b'NEXT'
self.obj_ut._iobuf.write(
b'\x84\x01\x00\x02\x03\x00\x00\x00\x15' + body + extra)
self.obj_ut.handle_read()
self.assertEqual(self.obj_ut._io_buffer.cql_frame_buffer.getvalue(), extra)
self.obj_ut.process_msg.assert_called_with(
_Frame(version=4, flags=1, stream=2, opcode=3, body_offset=9, end_pos=9 + len(body)), body)
@patch('twisted.internet.reactor.connectTCP')
def test_push(self, mock_connectTCP):
"""
Verifiy that push() calls transport.write(data).
"""
self.obj_ut.add_connection()
transport_mock = Mock()
self.obj_ut.transport = transport_mock
self.obj_ut.push('123 pickup')
self.mock_reactor_cft.assert_called_with(
transport_mock.write, '123 pickup')
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