zstd: vendor python-zstandard 0.6.0
Commit 63c68d6f5fc8de4afd9bde81b13b537beb4e47e8 from
https://github.com/indygreg/python-zstandard is imported without
modifications (other than removing unwanted files).
This includes minor performance and feature improvements. It also
changes the vendored zstd library from 1.1.1 to 1.1.2.
# no-check-commit
from __future__ import unicode_literals
try:
import unittest2 as unittest
except ImportError:
import unittest
import zstd
class TestModuleAttributes(unittest.TestCase):
def test_version(self):
self.assertEqual(zstd.ZSTD_VERSION, (1, 1, 2))
def test_constants(self):
self.assertEqual(zstd.MAX_COMPRESSION_LEVEL, 22)
self.assertEqual(zstd.FRAME_HEADER, b'\x28\xb5\x2f\xfd')
def test_hasattr(self):
attrs = (
'COMPRESSION_RECOMMENDED_INPUT_SIZE',
'COMPRESSION_RECOMMENDED_OUTPUT_SIZE',
'DECOMPRESSION_RECOMMENDED_INPUT_SIZE',
'DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE',
'MAGIC_NUMBER',
'WINDOWLOG_MIN',
'WINDOWLOG_MAX',
'CHAINLOG_MIN',
'CHAINLOG_MAX',
'HASHLOG_MIN',
'HASHLOG_MAX',
'HASHLOG3_MAX',
'SEARCHLOG_MIN',
'SEARCHLOG_MAX',
'SEARCHLENGTH_MIN',
'SEARCHLENGTH_MAX',
'TARGETLENGTH_MIN',
'TARGETLENGTH_MAX',
'STRATEGY_FAST',
'STRATEGY_DFAST',
'STRATEGY_GREEDY',
'STRATEGY_LAZY',
'STRATEGY_LAZY2',
'STRATEGY_BTLAZY2',
'STRATEGY_BTOPT',
)
for a in attrs:
self.assertTrue(hasattr(zstd, a))