Skip to content

Test that IGzipFile compresses with isal_zlib at the given level #308

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
ptweezy wants to merge 1 commit into
base: develop
Choose a base branch
from
Open

Test that IGzipFile compresses with isal_zlib at the given level #308

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 17 additions & 0 deletions tests/test_igzip.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,23 @@ def test_repr(tmp_path):
assert "<igzip _io.BufferedWriter name='" in repr(test)


@pytest.mark.parametrize("level", range(4))
def test_igzipfile_compresses_with_isal_zlib(level):
# 30,000 bytes fit in the write buffer that GzipFile has on Python 3.12
# and later (32 KiB or more), so IGzipFile compresses them with one
# compress() call.
with gzip.open(TEST_FILE, "rb") as f:
data = f.read(30_000)
buffer = io.BytesIO()
with igzip.IGzipFile(fileobj=buffer, mode="wb", compresslevel=level,
mtime=0) as f:
f.write(data)
compressor = isal_zlib.compressobj(level, wbits=-isal_zlib.MAX_WBITS)
expected = compressor.compress(data) + compressor.flush()
# Leave out the 10-byte header and the 8-byte trailer.
assert buffer.getvalue()[10:-8] == expected


def test_write_readonly_file():
with igzip.IGzipFile(TEST_FILE, "rb") as test:
with pytest.raises(OSError) as error:
Expand Down
Loading