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import lz4.frame as lz4frame
import lz4
import re
def test_library_version_number():
v = lz4.library_version_number()
assert isinstance(v, int)
assert v > 10000
def test_library_version_string():
v = lz4.library_version_string()
assert isinstance(v, str)
assert v.count('.') == 2
r = re.compile(r'^[0-9]*\.[0-9]*\.[0-9]*$')
assert r.match(v) is not None
def test_create_compression_context():
context = lz4frame.create_compression_context()
assert context is not None
def test_create_decompression_context():
context = lz4frame.create_decompression_context()
assert context is not None
def test_reset_decompression_context_1():
if lz4.library_version_number() >= 10800:
context = lz4frame.create_decompression_context()
r = lz4frame.reset_decompression_context(context)
assert r is None
else:
pass
def test_reset_decompression_context_2():
if lz4.library_version_number() >= 10800:
c = lz4frame.compress(b'1234', return_bytearray=False)
context = lz4frame.create_decompression_context()
try:
# Simulate an error by passing junk to decompress
d = lz4frame.decompress_chunk(context, c[4:])
except RuntimeError:
pass
r = lz4frame.reset_decompression_context(context)
assert r is None
# And confirm we can use the context after reset
d, bytes_read, eof = lz4frame.decompress_chunk(context, c)
assert d == b'1234'
assert bytes_read == len(c)
assert eof is True
else:
pass
def test_compress_return_type_1():
r = lz4frame.compress(b'', return_bytearray=False)
assert isinstance(r, bytes)
def test_compress_return_type_2():
r = lz4frame.compress(b'', return_bytearray=True)
assert isinstance(r, bytearray)
def test_decompress_return_type_1():
c = lz4frame.compress(b'', return_bytearray=False)
r = lz4frame.decompress(
c,
return_bytearray=False,
return_bytes_read=False
)
assert isinstance(r, bytes)
def test_decompress_return_type_2():
c = lz4frame.compress(b'', return_bytearray=False)
r = lz4frame.decompress(
c,
return_bytearray=True,
return_bytes_read=False
)
assert isinstance(r, bytearray)
def test_decompress_return_type_3():
c = lz4frame.compress(b'', return_bytearray=False)
r = lz4frame.decompress(
c,
return_bytearray=False,
return_bytes_read=True
)
assert isinstance(r, tuple)
assert isinstance(r[0], bytes)
assert isinstance(r[1], int)
def test_decompress_return_type_4():
c = lz4frame.compress(b'', return_bytearray=False)
r = lz4frame.decompress(
c,
return_bytearray=True,
return_bytes_read=True
)
assert isinstance(r, tuple)
assert isinstance(r[0], bytearray)
assert isinstance(r[1], int)
def test_decompress_chunk_return_type_1():
c = lz4frame.compress(b'', return_bytearray=False)
d = lz4frame.create_decompression_context()
r, b, e = lz4frame.decompress_chunk(
d,
c,
return_bytearray=False,
)
assert isinstance(r, bytes)
assert isinstance(b, int)
assert isinstance(e, bool)
def test_decompress_chunk_return_type_2():
c = lz4frame.compress(b'', return_bytearray=False)
d = lz4frame.create_decompression_context()
r, b, e = lz4frame.decompress_chunk(
d,
c,
return_bytearray=True,
)
assert isinstance(r, bytearray)
assert isinstance(b, int)
assert isinstance(e, bool)
def test_decompress_chunk_return_type_3():
c = lz4frame.compress(b'', return_bytearray=False)
d = lz4frame.create_decompression_context()
r = lz4frame.decompress_chunk(
d,
c,
return_bytearray=False,
)
assert isinstance(r, tuple)
assert isinstance(r[0], bytes)
assert isinstance(r[1], int)
assert isinstance(r[2], bool)
def test_decompress_chunk_return_type_4():
c = lz4frame.compress(b'', return_bytearray=False)
d = lz4frame.create_decompression_context()
r = lz4frame.decompress_chunk(
d,
c,
return_bytearray=True,
)
assert isinstance(r, tuple)
assert isinstance(r[0], bytearray)
assert isinstance(r[1], int)
assert isinstance(r[2], bool)
def test_block_size_constants():
assert lz4frame.BLOCKSIZE_DEFAULT == 0
assert lz4frame.BLOCKSIZE_MAX64KB == 4
assert lz4frame.BLOCKSIZE_MAX256KB == 5
assert lz4frame.BLOCKSIZE_MAX1MB == 6
assert lz4frame.BLOCKSIZE_MAX4MB == 7
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