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import lz4.block
import pytest
test_data = [
(b'a' * 1024 * 1024),
]
@pytest.fixture(
params=test_data,
ids=[
'data' + str(i) for i in range(len(test_data))
]
)
def data(request):
return request.param
def test_block_decompress_mem_usage(data):
tracemalloc = pytest.importorskip('tracemalloc')
tracemalloc.start()
compressed = lz4.block.compress(data)
prev_snapshot = None
for i in range(1000):
decompressed = lz4.block.decompress(compressed) # noqa: F841
if i % 100 == 0:
snapshot = tracemalloc.take_snapshot()
if prev_snapshot:
stats = snapshot.compare_to(prev_snapshot, 'lineno')
assert stats[0].size_diff < (1024 * 4)
prev_snapshot = snapshot
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