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|
import lz4.frame as lz4frame
import os
import pytest
from . helpers import (
get_frame_info_check,
get_chunked,
)
test_data=[
b'',
(128 * (32 * os.urandom(32))),
(256 * (32 * os.urandom(32))),
(512 * (32 * os.urandom(32))),
(1024 * (32 * os.urandom(32))),
]
@pytest.fixture(
params=test_data,
ids=[
'data' + str(i) for i in range(len(test_data))
]
)
def data(request):
return request.param
@pytest.fixture(
params=[
(True),
(False)
]
)
def reset(request):
return request.param
@pytest.fixture(
params=[
(1),
(8)
]
)
def chunks(request):
return request.param
def test_roundtrip_LZ4FrameCompressor(
data,
chunks,
block_size,
block_linked,
reset,
store_size,
block_checksum,
content_checksum):
with lz4frame.LZ4FrameCompressor(
block_size=block_size,
block_linked=block_linked,
content_checksum=content_checksum,
block_checksum=block_checksum,
) as compressor:
def do_compress():
if store_size is True:
compressed = compressor.begin(source_size=len(data))
else:
compressed = compressor.begin()
for chunk in get_chunked(data, chunks):
compressed += compressor.compress(chunk)
compressed += compressor.flush()
return compressed
compressed = do_compress()
if reset is True:
compressor.reset()
compressed = do_compress()
get_frame_info_check(
compressed,
len(data),
store_size,
block_size,
block_linked,
content_checksum,
block_checksum,
)
decompressed, bytes_read = lz4frame.decompress(compressed, return_bytes_read=True)
assert data == decompressed
assert bytes_read == len(compressed)
def test_roundtrip_LZ4FrameCompressor_LZ4FrameDecompressor(
data,
chunks,
block_size,
block_linked,
reset,
store_size,
block_checksum,
content_checksum):
with lz4frame.LZ4FrameCompressor(
block_size=block_size,
block_linked=block_linked,
content_checksum=content_checksum,
block_checksum=block_checksum,
) as compressor:
def do_compress():
if store_size is True:
compressed = compressor.begin(source_size=len(data))
else:
compressed = compressor.begin()
for chunk in get_chunked(data, chunks):
compressed += compressor.compress(chunk)
compressed += compressor.flush()
return compressed
compressed = do_compress()
if reset is True:
compressor.reset()
compressed = do_compress()
get_frame_info_check(
compressed,
len(data),
store_size,
block_size,
block_linked,
content_checksum,
block_checksum,
)
with lz4frame.LZ4FrameDecompressor() as decompressor:
decompressed = b''
for chunk in get_chunked(compressed, chunks):
b = decompressor.decompress(chunk)
decompressed += b
assert data == decompressed
|
