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view contrib/python-zstandard/tests/test_data_structures_fuzzing.py @ 37139:aa55c5354b8f
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author | Yuya Nishihara <yuya@tcha.org> |
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date | Wed, 28 Mar 2018 22:04:45 +0900 |
parents | e0dc40530c5a |
children | b1fb341d8a61 |
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import io import os try: import unittest2 as unittest except ImportError: import unittest try: import hypothesis import hypothesis.strategies as strategies except ImportError: raise unittest.SkipTest('hypothesis not available') import zstd from .common import ( make_cffi, ) s_windowlog = strategies.integers(min_value=zstd.WINDOWLOG_MIN, max_value=zstd.WINDOWLOG_MAX) s_chainlog = strategies.integers(min_value=zstd.CHAINLOG_MIN, max_value=zstd.CHAINLOG_MAX) s_hashlog = strategies.integers(min_value=zstd.HASHLOG_MIN, max_value=zstd.HASHLOG_MAX) s_searchlog = strategies.integers(min_value=zstd.SEARCHLOG_MIN, max_value=zstd.SEARCHLOG_MAX) s_searchlength = strategies.integers(min_value=zstd.SEARCHLENGTH_MIN, max_value=zstd.SEARCHLENGTH_MAX) s_targetlength = strategies.integers(min_value=zstd.TARGETLENGTH_MIN, max_value=zstd.TARGETLENGTH_MAX) s_strategy = strategies.sampled_from((zstd.STRATEGY_FAST, zstd.STRATEGY_DFAST, zstd.STRATEGY_GREEDY, zstd.STRATEGY_LAZY, zstd.STRATEGY_LAZY2, zstd.STRATEGY_BTLAZY2, zstd.STRATEGY_BTOPT)) @make_cffi @unittest.skipUnless('ZSTD_SLOW_TESTS' in os.environ, 'ZSTD_SLOW_TESTS not set') class TestCompressionParametersHypothesis(unittest.TestCase): @hypothesis.given(s_windowlog, s_chainlog, s_hashlog, s_searchlog, s_searchlength, s_targetlength, s_strategy) def test_valid_init(self, windowlog, chainlog, hashlog, searchlog, searchlength, targetlength, strategy): # ZSTD_checkCParams moves the goal posts on us from what's advertised # in the constants. So move along with them. if searchlength == zstd.SEARCHLENGTH_MIN and strategy in (zstd.STRATEGY_FAST, zstd.STRATEGY_GREEDY): searchlength += 1 elif searchlength == zstd.SEARCHLENGTH_MAX and strategy != zstd.STRATEGY_FAST: searchlength -= 1 p = zstd.CompressionParameters(windowlog, chainlog, hashlog, searchlog, searchlength, targetlength, strategy) cctx = zstd.ZstdCompressor(compression_params=p) with cctx.write_to(io.BytesIO()): pass @hypothesis.given(s_windowlog, s_chainlog, s_hashlog, s_searchlog, s_searchlength, s_targetlength, s_strategy) def test_estimate_compression_context_size(self, windowlog, chainlog, hashlog, searchlog, searchlength, targetlength, strategy): if searchlength == zstd.SEARCHLENGTH_MIN and strategy in (zstd.STRATEGY_FAST, zstd.STRATEGY_GREEDY): searchlength += 1 elif searchlength == zstd.SEARCHLENGTH_MAX and strategy != zstd.STRATEGY_FAST: searchlength -= 1 p = zstd.CompressionParameters(windowlog, chainlog, hashlog, searchlog, searchlength, targetlength, strategy) size = zstd.estimate_compression_context_size(p)