/usr/lib/python2.7/dist-packages/oslo_messaging/tests/drivers/test_impl_kafka.py is in python-oslo.messaging 5.10.0-2.
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#
# 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 kafka
from kafka.common import KafkaError
import mock
from oslo_serialization import jsonutils
import testscenarios
from testtools.testcase import unittest
import time
import oslo_messaging
from oslo_messaging._drivers import common as driver_common
from oslo_messaging._drivers import impl_kafka as kafka_driver
from oslo_messaging.tests import utils as test_utils
load_tests = testscenarios.load_tests_apply_scenarios
KAFKA_BROKER = 'localhost:9092'
KAFKA_BROKER_URL = 'kafka://localhost:9092'
def _is_kafka_service_running():
"""Checks whether the Kafka service is running or not"""
kafka_running = True
try:
broker = KAFKA_BROKER
kafka.KafkaClient(broker)
except KafkaError:
# Kafka service is not running.
kafka_running = False
return kafka_running
class TestKafkaDriverLoad(test_utils.BaseTestCase):
def setUp(self):
super(TestKafkaDriverLoad, self).setUp()
self.messaging_conf.transport_driver = 'kafka'
def test_driver_load(self):
transport = oslo_messaging.get_transport(self.conf)
self.assertIsInstance(transport._driver, kafka_driver.KafkaDriver)
class TestKafkaTransportURL(test_utils.BaseTestCase):
scenarios = [
('none', dict(url=None,
expected=dict(hostaddrs=['localhost:9092']))),
('empty', dict(url='kafka:///',
expected=dict(hostaddrs=['localhost:9092']))),
('host', dict(url='kafka://127.0.0.1',
expected=dict(hostaddrs=['127.0.0.1:9092']))),
('port', dict(url='kafka://localhost:1234',
expected=dict(hostaddrs=['localhost:1234']))),
('two', dict(url='kafka://localhost:1234,localhost2:1234',
expected=dict(hostaddrs=['localhost:1234',
'localhost2:1234']))),
]
def setUp(self):
super(TestKafkaTransportURL, self).setUp()
self.messaging_conf.transport_driver = 'kafka'
def test_transport_url(self):
transport = oslo_messaging.get_transport(self.conf, self.url)
self.addCleanup(transport.cleanup)
driver = transport._driver
conn = driver._get_connection(kafka_driver.PURPOSE_SEND)
self.assertEqual(self.expected['hostaddrs'], conn.hostaddrs)
class TestKafkaDriver(test_utils.BaseTestCase):
"""Unit Test cases to test the kafka driver
"""
def setUp(self):
super(TestKafkaDriver, self).setUp()
self.messaging_conf.transport_driver = 'kafka'
transport = oslo_messaging.get_transport(self.conf)
self.driver = transport._driver
def test_send(self):
target = oslo_messaging.Target(topic="topic_test")
self.assertRaises(NotImplementedError,
self.driver.send, target, {}, {})
def test_send_notification(self):
target = oslo_messaging.Target(topic="topic_test")
with mock.patch.object(
kafka_driver.Connection, 'notify_send') as fake_send:
self.driver.send_notification(target, {}, {}, None)
self.assertEqual(1, len(fake_send.mock_calls))
def test_listen(self):
target = oslo_messaging.Target(topic="topic_test")
self.assertRaises(NotImplementedError, self.driver.listen, target)
class TestKafkaConnection(test_utils.BaseTestCase):
def setUp(self):
super(TestKafkaConnection, self).setUp()
self.messaging_conf.transport_driver = 'kafka'
transport = oslo_messaging.get_transport(self.conf)
self.driver = transport._driver
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, '_send')
def test_notify(self, fake_send, fake_ensure_connection):
conn = self.driver._get_connection(kafka_driver.PURPOSE_SEND)
conn.notify_send("fake_topic", {"fake_ctxt": "fake_param"},
{"fake_text": "fake_message_1"}, 10)
self.assertEqual(1, len(fake_send.mock_calls))
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, '_send')
def test_notify_with_retry(self, fake_send, fake_ensure_connection):
conn = self.driver._get_connection(kafka_driver.PURPOSE_SEND)
fake_send.side_effect = KafkaError("fake_exception")
conn.notify_send("fake_topic", {"fake_ctxt": "fake_param"},
{"fake_text": "fake_message_2"}, 10)
self.assertEqual(10, len(fake_send.mock_calls))
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, '_parse_url')
def test_consume(self, fake_parse_url, fake_ensure_connection):
fake_message = {
"context": {"fake": "fake_context_1"},
"message": {"fake": "fake_message_1"}}
conn = kafka_driver.Connection(
self.conf, '', kafka_driver.PURPOSE_LISTEN)
conn.consumer = mock.MagicMock()
conn.consumer.fetch_messages = mock.MagicMock(
return_value=iter([jsonutils.dumps(fake_message)]))
self.assertEqual(fake_message, jsonutils.loads(conn.consume()[0]))
self.assertEqual(1, len(conn.consumer.fetch_messages.mock_calls))
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, '_parse_url')
def test_consume_timeout(self, fake_parse_url, fake_ensure_connection):
deadline = time.time() + 3
conn = kafka_driver.Connection(
self.conf, '', kafka_driver.PURPOSE_LISTEN)
conn.consumer = mock.MagicMock()
conn.consumer.fetch_messages = mock.MagicMock(return_value=iter([]))
self.assertRaises(driver_common.Timeout, conn.consume, timeout=3)
self.assertEqual(0, int(deadline - time.time()))
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, '_parse_url')
def test_consume_with_default_timeout(
self, fake_parse_url, fake_ensure_connection):
deadline = time.time() + 1
conn = kafka_driver.Connection(
self.conf, '', kafka_driver.PURPOSE_LISTEN)
conn.consumer = mock.MagicMock()
conn.consumer.fetch_messages = mock.MagicMock(return_value=iter([]))
self.assertRaises(driver_common.Timeout, conn.consume)
self.assertEqual(0, int(deadline - time.time()))
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, '_parse_url')
def test_consume_timeout_without_consumers(
self, fake_parse_url, fake_ensure_connection):
deadline = time.time() + 3
conn = kafka_driver.Connection(
self.conf, '', kafka_driver.PURPOSE_LISTEN)
conn.consumer = mock.MagicMock(return_value=None)
self.assertRaises(driver_common.Timeout, conn.consume, timeout=3)
self.assertEqual(0, int(deadline - time.time()))
class TestKafkaListener(test_utils.BaseTestCase):
def setUp(self):
super(TestKafkaListener, self).setUp()
self.messaging_conf.transport_driver = 'kafka'
transport = oslo_messaging.get_transport(self.conf)
self.driver = transport._driver
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, 'declare_topic_consumer')
def test_create_listener(self, fake_consumer, fake_ensure_connection):
fake_target = oslo_messaging.Target(topic='fake_topic')
fake_targets_and_priorities = [(fake_target, 'info')]
self.driver.listen_for_notifications(fake_targets_and_priorities, None,
None, None)
self.assertEqual(1, len(fake_consumer.mock_calls))
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, 'declare_topic_consumer')
def test_converting_targets_to_topics(self, fake_consumer,
fake_ensure_connection):
fake_targets_and_priorities = [
(oslo_messaging.Target(topic="fake_topic",
exchange="test1"), 'info'),
(oslo_messaging.Target(topic="fake_topic",
exchange="test2"), 'info'),
(oslo_messaging.Target(topic="fake_topic",
exchange="test1"), 'error'),
(oslo_messaging.Target(topic="fake_topic",
exchange="test3"), 'error'),
]
self.driver.listen_for_notifications(fake_targets_and_priorities, None,
None, None)
self.assertEqual(1, len(fake_consumer.mock_calls))
fake_consumer.assert_called_once_with(set(['fake_topic.error',
'fake_topic.info']),
None)
@mock.patch.object(kafka_driver.Connection, '_ensure_connection')
@mock.patch.object(kafka_driver.Connection, 'declare_topic_consumer')
def test_stop_listener(self, fake_consumer, fake_client):
fake_target = oslo_messaging.Target(topic='fake_topic')
fake_targets_and_priorities = [(fake_target, 'info')]
listener = self.driver.listen_for_notifications(
fake_targets_and_priorities, None, None, None)._poll_style_listener
listener.conn.consume = mock.MagicMock()
listener.conn.consume.return_value = (
iter([kafka.common.KafkaMessage(
topic='fake_topic', partition=0, offset=0,
key=None, value='{"message": {"fake": "fake_message_1"},'
'"context": {"fake": "fake_context_1"}}')]))
listener.poll()
self.assertEqual(1, len(listener.conn.consume.mock_calls))
listener.conn.stop_consuming = mock.MagicMock()
listener.stop()
fake_response = listener.poll()
self.assertEqual(1, len(listener.conn.consume.mock_calls))
self.assertEqual([], fake_response)
class TestWithRealKafkaBroker(test_utils.BaseTestCase):
def setUp(self):
super(TestWithRealKafkaBroker, self).setUp()
self.messaging_conf.transport_driver = 'kafka'
transport = oslo_messaging.get_transport(self.conf, KAFKA_BROKER_URL)
self.driver = transport._driver
@unittest.skipUnless(
_is_kafka_service_running(), "Kafka service is not available")
def test_send_and_receive_message(self):
target = oslo_messaging.Target(
topic="fake_topic", exchange='fake_exchange')
targets_and_priorities = [(target, 'fake_info')]
listener = self.driver.listen_for_notifications(
targets_and_priorities, None, None, None)._poll_style_listener
fake_context = {"fake_context_key": "fake_context_value"}
fake_message = {"fake_message_key": "fake_message_value"}
self.driver.send_notification(
target, fake_context, fake_message, None)
received_message = listener.poll()[0]
self.assertEqual(fake_context, received_message.ctxt)
self.assertEqual(fake_message, received_message.message)
@unittest.skipUnless(
_is_kafka_service_running(), "Kafka service is not available")
def test_send_and_receive_message_without_exchange(self):
target = oslo_messaging.Target(topic="fake_no_exchange_topic")
targets_and_priorities = [(target, 'fake_info')]
listener = self.driver.listen_for_notifications(
targets_and_priorities, None, None, None)._poll_style_listener
fake_context = {"fake_context_key": "fake_context_value"}
fake_message = {"fake_message_key": "fake_message_value"}
self.driver.send_notification(
target, fake_context, fake_message, None)
received_message = listener.poll()[0]
self.assertEqual(fake_context, received_message.ctxt)
self.assertEqual(fake_message, received_message.message)
@unittest.skipUnless(
_is_kafka_service_running(), "Kafka service is not available")
def test_receive_message_from_empty_topic_with_timeout(self):
target = oslo_messaging.Target(
topic="fake_empty_topic", exchange='fake_empty_exchange')
targets_and_priorities = [(target, 'fake_info')]
listener = self.driver.listen_for_notifications(
targets_and_priorities, None, None, None)._poll_style_listener
deadline = time.time() + 3
received_message = listener.poll(batch_timeout=3)
self.assertEqual(0, int(deadline - time.time()))
self.assertEqual([], received_message)
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