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#!/usr/bin/env python
from confluent_kafka import (Consumer, TopicPartition, KafkaError,
KafkaException, TIMESTAMP_NOT_AVAILABLE,
OFFSET_INVALID, libversion)
import pytest
def test_basic_api():
""" Basic API tests, these wont really do anything since there is no
broker configured. """
with pytest.raises(TypeError) as ex:
kc = Consumer()
assert ex.match('expected configuration dict')
def dummy_commit_cb(err, partitions):
pass
kc = Consumer({'group.id': 'test', 'socket.timeout.ms': '100',
'session.timeout.ms': 1000, # Avoid close() blocking too long
'on_commit': dummy_commit_cb})
kc.subscribe(["test"])
kc.unsubscribe()
def dummy_assign_revoke(consumer, partitions):
pass
kc.subscribe(["test"], on_assign=dummy_assign_revoke, on_revoke=dummy_assign_revoke)
kc.unsubscribe()
msg = kc.poll(timeout=0.001)
if msg is None:
print('OK: poll() timeout')
elif msg.error():
print('OK: consumer error: %s' % msg.error().str())
else:
print('OK: consumed message')
if msg is not None:
assert msg.timestamp() == (TIMESTAMP_NOT_AVAILABLE, -1)
msglist = kc.consume(num_messages=10, timeout=0.001)
assert len(msglist) == 0, "expected 0 messages, not %d" % len(msglist)
with pytest.raises(ValueError) as ex:
kc.consume(-100)
assert 'num_messages must be between 0 and 1000000 (1M)' == str(ex.value)
with pytest.raises(ValueError) as ex:
kc.consume(1000001)
assert 'num_messages must be between 0 and 1000000 (1M)' == str(ex.value)
partitions = list(map(lambda part: TopicPartition("test", part), range(0, 100, 3)))
kc.assign(partitions)
with pytest.raises(KafkaException) as ex:
kc.seek(TopicPartition("test", 0, 123))
assert 'Erroneous state' in str(ex.value)
# Verify assignment
assignment = kc.assignment()
assert partitions == assignment
# Pause partitions
kc.pause(partitions)
# Resume partitions
kc.resume(partitions)
# Get cached watermarks, should all be invalid.
lo, hi = kc.get_watermark_offsets(partitions[0], cached=True)
assert lo == -1001 and hi == -1001
assert lo == OFFSET_INVALID and hi == OFFSET_INVALID
# Query broker for watermarks, should raise an exception.
try:
lo, hi = kc.get_watermark_offsets(partitions[0], timeout=0.5, cached=False)
except KafkaException as e:
assert e.args[0].code() in (
KafkaError._TIMED_OUT, KafkaError._WAIT_COORD,
KafkaError.LEADER_NOT_AVAILABLE,
KafkaError._ALL_BROKERS_DOWN)
kc.unassign()
kc.commit(asynchronous=True)
try:
kc.commit(asynchronous=False)
except KafkaException as e:
assert e.args[0].code() in (KafkaError._TIMED_OUT, KafkaError._NO_OFFSET)
# Get current position, should all be invalid.
kc.position(partitions)
assert len([p for p in partitions if p.offset == OFFSET_INVALID]) == len(partitions)
try:
kc.committed(partitions, timeout=0.001)
except KafkaException as e:
assert e.args[0].code() == KafkaError._TIMED_OUT
try:
kc.list_topics(timeout=0.2)
except KafkaException as e:
assert e.args[0].code() in (KafkaError._TIMED_OUT, KafkaError._TRANSPORT)
try:
kc.list_topics(topic="hi", timeout=0.1)
except KafkaException as e:
assert e.args[0].code() in (KafkaError._TIMED_OUT, KafkaError._TRANSPORT)
kc.close()
@pytest.mark.skipif(libversion()[1] < 0x000b0000,
reason="requires librdkafka >=0.11.0")
def test_store_offsets():
""" Basic store_offsets() tests """
c = Consumer({'group.id': 'test',
'enable.auto.commit': True,
'enable.auto.offset.store': False,
'socket.timeout.ms': 50,
'session.timeout.ms': 100})
c.subscribe(["test"])
try:
c.store_offsets(offsets=[TopicPartition("test", 0, 42)])
except KafkaException as e:
assert e.args[0].code() == KafkaError._UNKNOWN_PARTITION
c.unsubscribe()
c.close()
# librdkafka <=0.9.2 has a race-issue where it will hang indefinately
# if a commit is issued when no coordinator is available.
@pytest.mark.skipif(libversion()[1] <= 0x000902ff,
reason="requires librdkafka >0.9.2")
def test_on_commit():
""" Verify that on_commit is only called once per commit() (issue #71) """
class CommitState(object):
def __init__(self, topic, partition):
self.topic = topic
self.partition = partition
self.once = True
def commit_cb(cs, err, ps):
print('on_commit: err %s, partitions %s' % (err, ps))
assert cs.once is True
assert err == KafkaError._NO_OFFSET
assert len(ps) == 1
p = ps[0]
assert p.topic == cs.topic
assert p.partition == cs.partition
cs.once = False
cs = CommitState('test', 2)
c = Consumer({'group.id': 'x',
'enable.auto.commit': False, 'socket.timeout.ms': 50,
'session.timeout.ms': 100,
'on_commit': lambda err, ps: commit_cb(cs, err, ps)})
c.assign([TopicPartition(cs.topic, cs.partition)])
for i in range(1, 3):
c.poll(0.1)
if cs.once:
# Try commit once
try:
c.commit(asynchronous=False)
except KafkaException as e:
print('commit failed with %s (expected)' % e)
assert e.args[0].code() == KafkaError._NO_OFFSET
c.close()
def test_subclassing():
class SubConsumer(Consumer):
def poll(self, somearg):
assert type(somearg) == str
super(SubConsumer, self).poll(timeout=0.0001)
sc = SubConsumer({"group.id": "test", "session.timeout.ms": "90"})
sc.poll("astring")
sc.close()
@pytest.mark.skipif(libversion()[1] < 0x000b0000,
reason="requires librdkafka >=0.11.0")
def test_offsets_for_times():
c = Consumer({'group.id': 'test',
'enable.auto.commit': True,
'enable.auto.offset.store': False,
'socket.timeout.ms': 50,
'session.timeout.ms': 100})
# Query broker for timestamps for partition
try:
test_topic_partition = TopicPartition("test", 0, 100)
c.offsets_for_times([test_topic_partition], timeout=0.1)
except KafkaException as e:
assert e.args[0].code() in (
KafkaError._TIMED_OUT, KafkaError._WAIT_COORD,
KafkaError.LEADER_NOT_AVAILABLE,
KafkaError._ALL_BROKERS_DOWN)
c.close()
def test_multiple_close_does_not_throw_exception():
""" Calling Consumer.close() multiple times should not throw Runtime Exception
"""
c = Consumer({'group.id': 'test',
'enable.auto.commit': True,
'enable.auto.offset.store': False,
'socket.timeout.ms': 50,
'session.timeout.ms': 100})
c.subscribe(["test"])
c.unsubscribe()
c.close()
c.close()
def test_any_method_after_close_throws_exception():
""" Calling any consumer method after close should thorw a RuntimeError
"""
c = Consumer({'group.id': 'test',
'enable.auto.commit': True,
'enable.auto.offset.store': False,
'socket.timeout.ms': 50,
'session.timeout.ms': 100})
c.subscribe(["test"])
c.unsubscribe()
c.close()
with pytest.raises(RuntimeError) as ex:
c.subscribe(['test'])
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.unsubscribe()
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.poll()
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.consume()
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.assign([TopicPartition('test', 0)])
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.unassign()
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.assignment()
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.commit()
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.committed([TopicPartition("test", 0)])
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.position([TopicPartition("test", 0)])
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.seek(TopicPartition("test", 0, 0))
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
lo, hi = c.get_watermark_offsets(TopicPartition("test", 0))
assert ex.match('Consumer closed')
@pytest.mark.skipif(libversion()[1] < 0x000b0000,
reason="requires librdkafka >=0.11.0")
def test_calling_store_offsets_after_close_throws_erro():
""" calling store_offset after close should throw RuntimeError """
c = Consumer({'group.id': 'test',
'enable.auto.commit': True,
'enable.auto.offset.store': False,
'socket.timeout.ms': 50,
'session.timeout.ms': 100})
c.subscribe(["test"])
c.unsubscribe()
c.close()
with pytest.raises(RuntimeError) as ex:
c.store_offsets(offsets=[TopicPartition("test", 0, 42)])
assert ex.match('Consumer closed')
with pytest.raises(RuntimeError) as ex:
c.offsets_for_times([TopicPartition("test", 0)])
assert ex.match('Consumer closed')
def test_consumer_without_groupid():
""" Consumer should raise exception if group.id is not set """
with pytest.raises(ValueError) as ex:
Consumer({'bootstrap.servers': "mybroker:9092"})
assert ex.match('group.id must be set')
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