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from __future__ import absolute_import
import pytest
from kafka.partitioner import DefaultPartitioner, murmur2
def test_default_partitioner():
partitioner = DefaultPartitioner()
all_partitions = available = list(range(100))
# partitioner should return the same partition for the same key
p1 = partitioner(b'foo', all_partitions, available)
p2 = partitioner(b'foo', all_partitions, available)
assert p1 == p2
assert p1 in all_partitions
# when key is None, choose one of available partitions
assert partitioner(None, all_partitions, [123]) == 123
# with fallback to all_partitions
assert partitioner(None, all_partitions, []) in all_partitions
@pytest.mark.parametrize("bytes_payload,partition_number", [
(b'', 681), (b'a', 524), (b'ab', 434), (b'abc', 107), (b'123456789', 566),
(b'\x00 ', 742)
])
def test_murmur2_java_compatibility(bytes_payload, partition_number):
partitioner = DefaultPartitioner()
all_partitions = available = list(range(1000))
# compare with output from Kafka's org.apache.kafka.clients.producer.Partitioner
assert partitioner(bytes_payload, all_partitions, available) == partition_number
def test_murmur2_not_ascii():
# Verify no regression of murmur2() bug encoding py2 bytes that don't ascii encode
murmur2(b'\xa4')
murmur2(b'\x81' * 1000)
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