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import array
import os
import unittest
import random
import struct
import sys
from typing import Union, List, TYPE_CHECKING
import xxhash
if TYPE_CHECKING:
InputType = Union[str, bytes, bytearray, memoryview, array.ArrayType[int]]
else:
InputType = None
def getrefcount(obj):
if hasattr(sys, "getrefcount"):
return sys.getrefcount(obj)
else:
# Non-CPython implementation
return 0
class TestXXH(unittest.TestCase):
def test_version(self):
self.assertTrue(xxhash.VERSION)
self.assertTrue(xxhash.XXHASH_VERSION)
def test_buffer_types(self):
# Various buffer-like objects are accepted, and they give similar values
args: List[InputType] = [
b'ab\x00c',
bytearray(b'ab\x00c'),
array.array('b', b'ab\x00c'),
]
# An array object with non-1 itemsize
a = array.array('i', struct.unpack('i', b'ab\x00c'))
assert a.itemsize == 4
args.append(a)
# A memoryview, where supported
if sys.version_info >= (2, 7):
args.append(memoryview(b'ab\x00c'))
for func in [xxhash.xxh32, xxhash.xxh64, xxhash.xxh3_64, xxhash.xxh3_128]:
old_refcounts = list(map(getrefcount, args))
# With constructor
values = set(func(arg).hexdigest() for arg in args)
self.assertEqual(len(values), 1, values)
# With update()
values = set()
for arg in args:
x = func()
x.update(arg)
values.add(x.hexdigest())
self.assertEqual(len(values), 1, values)
# No reference leak in CPython extension
del arg
self.assertEqual(list(map(getrefcount, args)), old_refcounts)
if __name__ == '__main__':
unittest.main()
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