Python testutil.random_string函数代码示例

def test_end_to_end(kafka_broker):
    connect_str = 'localhost:' + str(kafka_broker.port)
    producer = KafkaProducer(bootstrap_servers=connect_str,
                             max_block_ms=10000,
                             value_serializer=str.encode)
    consumer = KafkaConsumer(bootstrap_servers=connect_str,
                             group_id=None,
                             consumer_timeout_ms=10000,
                             auto_offset_reset='earliest',
                             value_deserializer=bytes.decode)

    topic = random_string(5)

    for i in range(1000):
        producer.send(topic, 'msg %d' % i)
    producer.flush()
    producer.close()

    consumer.subscribe([topic])
    msgs = set()
    for i in range(1000):
        try:
            msgs.add(next(consumer).value)
        except StopIteration:
            break

    assert msgs == set(['msg %d' % i for i in range(1000)])

 def _send_random_messages(self, producer, topic, partition, n):
     for j in range(n):
         logging.debug('_send_random_message to %s:%d -- try %d', topic, partition, j)
         resp = producer.send_messages(topic, partition, random_string(10))
         if len(resp) > 0:
             self.assertEqual(resp[0].error, 0)
         logging.debug('_send_random_message to %s:%d -- try %d success', topic, partition, j)

def test_heartbeat_thread(kafka_broker, topic):
    group_id = 'test-group-' + random_string(6)
    consumer = KafkaConsumer(topic,
                             bootstrap_servers=get_connect_str(kafka_broker),
                             group_id=group_id,
                             heartbeat_interval_ms=500)

    # poll until we have joined group / have assignment
    while not consumer.assignment():
        consumer.poll(timeout_ms=100)

    assert consumer._coordinator.state is MemberState.STABLE
    last_poll = consumer._coordinator.heartbeat.last_poll
    last_beat = consumer._coordinator.heartbeat.last_send

    timeout = time.time() + 30
    while True:
        if time.time() > timeout:
            raise RuntimeError('timeout waiting for heartbeat')
        if consumer._coordinator.heartbeat.last_send > last_beat:
            break
        time.sleep(0.5)

    assert consumer._coordinator.heartbeat.last_poll == last_poll
    consumer.poll(timeout_ms=100)
    assert consumer._coordinator.heartbeat.last_poll > last_poll
    consumer.close()

    def test_huge_messages(self):
        huge_message, = self.send_messages(0, [
            create_message(random_string(MAX_FETCH_BUFFER_SIZE_BYTES + 10)),
        ])

        # Create a consumer with the default buffer size
        consumer = self.consumer()

        # This consumer failes to get the message
        with self.assertRaises(ConsumerFetchSizeTooSmall):
            consumer.get_message(False, 0.1)

        consumer.stop()

        # Create a consumer with no fetch size limit
        big_consumer = self.consumer(
            max_buffer_size = None,
            partitions = [0],
        )

        # Seek to the last message
        big_consumer.seek(-1, 2)

        # Consume giant message successfully
        message = big_consumer.get_message(block=False, timeout=10)
        self.assertIsNotNone(message)
        self.assertEqual(message.message.value, huge_message)

        big_consumer.stop()

def test_lz4_incremental():
    for i in xrange(1000):
        # lz4 max single block size is 4MB
        # make sure we test with multiple-blocks
        b1 = random_string(100).encode('utf-8') * 50000
        b2 = lz4_decode(lz4_encode(b1))
        assert len(b1) == len(b2)
        assert b1 == b2

    def setUpClass(cls):
        if not os.environ.get('KAFKA_VERSION'):
            return

        cls.zk = ZookeeperFixture.instance()
        chroot = random_string(10)
        cls.server1 = KafkaFixture.instance(0, cls.zk.host, cls.zk.port, chroot)
        cls.server2 = KafkaFixture.instance(1, cls.zk.host, cls.zk.port, chroot)

        cls.server = cls.server1 # Bootstrapping server

 def _send_random_messages(self, producer, topic, partition, n):
     for j in range(n):
         msg = 'msg {0}: {1}'.format(j, random_string(10))
         log.debug('_send_random_message %s to %s:%d', msg, topic, partition)
         while True:
             try:
                 producer.send_messages(topic, partition, msg.encode('utf-8'))
             except:
                 log.exception('failure in _send_random_messages - retrying')
                 continue
             else:
                 break

    def test_large_messages(self):
        # Produce 10 "normal" size messages
        small_messages = self.send_messages(0, [ str(x) for x in range(10) ])

        # Produce 10 messages that are large (bigger than default fetch size)
        large_messages = self.send_messages(0, [ random_string(5000) for x in range(10) ])

        # Consumer should still get all of them
        consumer = self.consumer()

        expected_messages = set(small_messages + large_messages)
        actual_messages = set([ x.message.value for x in consumer ])
        self.assertEqual(expected_messages, actual_messages)

        consumer.stop()

    def setUpClass(cls):  # noqa
        if not os.environ.get('KAFKA_VERSION'):
            return

        zk_chroot = random_string(10)
        replicas = 2
        partitions = 2

        # mini zookeeper, 2 kafka brokers
        cls.zk = ZookeeperFixture.instance()
        kk_args = [cls.zk.host, cls.zk.port, zk_chroot, replicas, partitions]
        cls.brokers = [KafkaFixture.instance(i, *kk_args) for i in range(replicas)]

        hosts = ['%s:%d' % (b.host, b.port) for b in cls.brokers]
        cls.client = KafkaClient(hosts)

    def setUp(self):
        if not os.environ.get('KAFKA_VERSION'):
            self.skipTest('integration test requires KAFKA_VERSION')

        zk_chroot = random_string(10)
        replicas = 3
        partitions = 3

        # mini zookeeper, 3 kafka brokers
        self.zk = ZookeeperFixture.instance()
        kk_args = [self.zk.host, self.zk.port, zk_chroot, replicas, partitions]
        self.brokers = [KafkaFixture.instance(i, *kk_args) for i in range(replicas)]

        hosts = ['%s:%d' % (b.host, b.port) for b in self.brokers]
        self.client = SimpleClient(hosts, timeout=2)
        super(TestFailover, self).setUp()

    def setUp(self):
        if not os.environ.get('KAFKA_VERSION'):
            return

        zk_chroot = random_string(10)
        replicas = 2
        partitions = 2

        # mini zookeeper, 2 kafka brokers
        self.zk = ZookeeperFixture.instance()
        kk_args = [self.zk.host, self.zk.port, zk_chroot, replicas, partitions]
        self.brokers = [KafkaFixture.instance(i, *kk_args) for i in range(replicas)]

        hosts = ['%s:%d' % (b.host, b.port) for b in self.brokers]
        self.client = KafkaClient(hosts)
        super(TestFailover, self).setUp()

def test_kafka_producer_proper_record_metadata(kafka_broker, compression):
    connect_str = ':'.join([kafka_broker.host, str(kafka_broker.port)])
    producer = KafkaProducer(bootstrap_servers=connect_str,
                             retries=5,
                             max_block_ms=30000,
                             compression_type=compression)
    magic = producer._max_usable_produce_magic()

    topic = random_string(5)
    future = producer.send(
        topic,
        value=b"Simple value", key=b"Simple key", timestamp_ms=9999999,
        partition=0)
    record = future.get(timeout=5)
    assert record is not None
    assert record.topic == topic
    assert record.partition == 0
    assert record.topic_partition == TopicPartition(topic, 0)
    assert record.offset == 0
    if magic >= 1:
        assert record.timestamp == 9999999
    else:
        assert record.timestamp == -1  # NO_TIMESTAMP

    if magic >= 2:
        assert record.checksum is None
    elif magic == 1:
        assert record.checksum == 1370034956
    else:
        assert record.checksum == 3296137851

    assert record.serialized_key_size == 10
    assert record.serialized_value_size == 12

    # generated timestamp case is skipped for broker 0.9 and below
    if magic == 0:
        return

    send_time = time.time() * 1000
    future = producer.send(
        topic,
        value=b"Simple value", key=b"Simple key", timestamp_ms=None,
        partition=0)
    record = future.get(timeout=5)
    assert abs(record.timestamp - send_time) <= 1000  # Allow 1s deviation

    def assert_message_count(self, topic, check_count, timeout=10, partitions=None):
        hosts = ",".join(["%s:%d" % (broker.host, broker.port) for broker in self.brokers])

        client = KafkaClient(hosts)
        group = random_string(10)
        consumer = SimpleConsumer(client, group, topic, partitions=partitions, auto_commit=False, iter_timeout=timeout)

        started_at = time.time()
        pending = consumer.pending(partitions)

        # Keep checking if it isn't immediately correct, subject to timeout
        while pending != check_count and (time.time() - started_at < timeout):
            pending = consumer.pending(partitions)

        consumer.stop()
        client.close()

        self.assertEqual(pending, check_count)

    def test_kafka_consumer__offset_commit_resume_dual(self):
        GROUP_ID = random_string(10).encode('utf-8')

        self.send_messages(0, range(0, 100))
        self.send_messages(1, range(100, 200))

        # Start a consumer
        consumer1 = self.kafka_consumer(
            group_id = GROUP_ID,
            auto_commit_enable = True,
            auto_commit_interval_ms = None,
            auto_commit_interval_messages = 20,
            auto_offset_reset='smallest',
            offset_storage='kafka',
        )

        # Grab the first 195 messages
        output_msgs1 = []
        for _ in xrange(195):
            m = consumer1.next()
            output_msgs1.append(m)
            consumer1.task_done(m)
        self.assert_message_count(output_msgs1, 195)

        # The total offset across both partitions should be at 180
        consumer2 = self.kafka_consumer(
            group_id = GROUP_ID,
            auto_commit_enable = True,
            auto_commit_interval_ms = None,
            auto_commit_interval_messages = 20,
            consumer_timeout_ms = 100,
            auto_offset_reset='smallest',
            offset_storage='dual',
        )

        # 181-200
        output_msgs2 = []
        with self.assertRaises(ConsumerTimeout):
            while True:
                m = consumer2.next()
                output_msgs2.append(m)
        self.assert_message_count(output_msgs2, 20)
        self.assertEqual(len(set(output_msgs1) & set(output_msgs2)), 15)

def test_end_to_end(kafka_broker, compression):

    if compression == 'lz4':
        # LZ4 requires 0.8.2
        if version() < (0, 8, 2):
            return
        # LZ4 python libs dont work on python2.6
        elif sys.version_info < (2, 7):
            return

    connect_str = 'localhost:' + str(kafka_broker.port)
    producer = KafkaProducer(bootstrap_servers=connect_str,
                             retries=5,
                             max_block_ms=10000,
                             compression_type=compression,
                             value_serializer=str.encode)
    consumer = KafkaConsumer(bootstrap_servers=connect_str,
                             group_id=None,
                             consumer_timeout_ms=10000,
                             auto_offset_reset='earliest',
                             value_deserializer=bytes.decode)

    topic = random_string(5)

    messages = 100
    futures = []
    for i in range(messages):
        futures.append(producer.send(topic, 'msg %d' % i))
    ret = [f.get(timeout=30) for f in futures]
    assert len(ret) == messages

    producer.close()

    consumer.subscribe([topic])
    msgs = set()
    for i in range(messages):
        try:
            msgs.add(next(consumer).value)
        except StopIteration:
            break

    assert msgs == set(['msg %d' % i for i in range(messages)])