def test_decode_fetch_response(self):
t1 = b"topic1"
t2 = b"topic2"
msgs = [create_message(msg)
for msg in [b"message1", b"hi", b"boo", b"foo", b"so fun!"]]
ms1 = KafkaProtocol._encode_message_set([msgs[0], msgs[1]])
ms2 = KafkaProtocol._encode_message_set([msgs[2]])
ms3 = KafkaProtocol._encode_message_set([msgs[3], msgs[4]])
encoded = struct.pack('>iih%dsiihqi%dsihqi%dsh%dsiihqi%ds' %
(len(t1), len(ms1), len(ms2), len(t2), len(ms3)),
4, 2, len(t1), t1, 2, 0, 0, 10, len(ms1), ms1, 1,
1, 20, len(ms2), ms2, len(t2), t2, 1, 0, 0, 30,
len(ms3), ms3)
responses = list(KafkaProtocol.decode_fetch_response(encoded))
def expand_messages(response):
return FetchResponsePayload(response.topic, response.partition,
response.error, response.highwaterMark,
list(response.messages))
expanded_responses = list(map(expand_messages, responses))
expect = [FetchResponsePayload(t1, 0, 0, 10, [OffsetAndMessage(0, msgs[0]),
OffsetAndMessage(0, msgs[1])]),
FetchResponsePayload(t1, 1, 1, 20, [OffsetAndMessage(0, msgs[2])]),
FetchResponsePayload(t2, 0, 0, 30, [OffsetAndMessage(0, msgs[3]),
OffsetAndMessage(0, msgs[4])])]
self.assertEqual(expanded_responses, expect)
def fail_requests(payloads, **kwargs):
responses = [
FetchResponsePayload(payloads[0].topic, payloads[0].partition, 0, 0,
[OffsetAndMessage(
payloads[0].offset + i,
"msg %d" % (payloads[0].offset + i))
for i in range(10)]),
]
for failure in payloads[1:]:
responses.append(error_factory(failure))
return responses
def unknown_topic_partition(request):
return FetchResponsePayload(request.topic, request.partition,
UnknownTopicOrPartitionError.errno, -1, ())
def not_leader(request):
return FetchResponsePayload(request.topic, request.partition,
NotLeaderForPartitionError.errno, -1, ())
def expand_messages(response):
return FetchResponsePayload(response.topic, response.partition,
response.error, response.highwaterMark,
list(response.messages))