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import pytest
import six
from kafka.partitioner import Murmur2Partitioner
from kafka.partitioner.default import DefaultPartitioner
def test_default_partitioner():
partitioner = DefaultPartitioner()
all_partitions = list(range(100))
available = all_partitions
# 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
def test_hash_bytes():
p = Murmur2Partitioner(range(1000))
assert p.partition(bytearray(b'test')) == p.partition(b'test')
def test_hash_encoding():
p = Murmur2Partitioner(range(1000))
assert p.partition('test') == p.partition(u'test')
def test_murmur2_java_compatibility():
p = Murmur2Partitioner(range(1000))
# compare with output from Kafka's org.apache.kafka.clients.producer.Partitioner
assert p.partition(b'') == 681
assert p.partition(b'a') == 524
assert p.partition(b'ab') == 434
assert p.partition(b'abc') == 107
assert p.partition(b'123456789') == 566
assert p.partition(b'\x00 ') == 742
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