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# The MIT License (MIT)
# Copyright (c) Microsoft Corporation. All rights reserved.
import struct
import unittest
import pytest
from azure.cosmos._cosmos_integers import _UInt128
from azure.cosmos._cosmos_murmurhash3 import murmurhash3_128
@pytest.mark.cosmosEmulator
class TestMurmurHash3(unittest.TestCase):
"""Python Murmurhash3 Tests and its compatibility with backend implementation..
"""
string_low_value = 2792699143512860960
string_high_value = 15069672278200047189
test_seed = _UInt128(0, 0)
float_low_value = 16628891264555680919
float_high_value = 12953474369317462
def test_float_hash(self):
ba = bytearray(struct.pack("d", 374.0))
ret = murmurhash3_128(ba, self.test_seed)
self.assertEqual(self.float_low_value, ret.get_low().value)
self.assertEqual(self.float_high_value, ret.get_high().value)
def test_string_hash(self):
s = "afdgdd" # cspell:disable-line
ba = bytearray()
ba.extend(s.encode('utf-8'))
ret = murmurhash3_128(ba, self.test_seed)
self.assertEqual(self.string_low_value, ret.get_low().value)
self.assertEqual(self.string_high_value, ret.get_high().value)
if __name__ == '__main__':
try:
unittest.main()
except SystemExit as inst:
if inst.args[0] is True: # raised by sys.exit(True) when tests failed
raise
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