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TestCase,
)
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_minmatch = strategies.integers(
min_value=zstd.MINMATCH_MIN, max_value=zstd.MINMATCH_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,
zstd.STRATEGY_BTULTRA,
zstd.STRATEGY_BTULTRA2,
)
def test_estimated_compression_context_size(
self, windowlog, chainlog, hashlog, searchlog, minmatch, targetlength, strategy
):
if minmatch == zstd.MINMATCH_MIN and strategy in (
zstd.STRATEGY_FAST,
zstd.STRATEGY_GREEDY,
):
minmatch += 1
elif minmatch == zstd.MINMATCH_MAX and strategy != zstd.STRATEGY_FAST:
minmatch -= 1
p = zstd.ZstdCompressionParameters(
window_log=windowlog,
chain_log=chainlog,
hash_log=hashlog,
search_log=searchlog,
min_match=minmatch,
target_length=targetlength,
strategy=strategy,
)
size = p.estimated_compression_context_size()
zstd.ZstdCompressionParameters(
window_log=zstd.WINDOWLOG_MIN,
chain_log=zstd.CHAINLOG_MIN,
hash_log=zstd.HASHLOG_MIN,
search_log=zstd.SEARCHLOG_MIN,
min_match=zstd.MINMATCH_MIN + 1,
target_length=zstd.TARGETLENGTH_MIN,
strategy=zstd.STRATEGY_FAST,
)
zstd.ZstdCompressionParameters(
window_log=zstd.WINDOWLOG_MAX,
chain_log=zstd.CHAINLOG_MAX,
hash_log=zstd.HASHLOG_MAX,
search_log=zstd.SEARCHLOG_MAX,
min_match=zstd.MINMATCH_MAX - 1,
target_length=zstd.TARGETLENGTH_MAX,
strategy=zstd.STRATEGY_BTULTRA2,
)