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import wheel.install
import hashlib
try:
from StringIO import StringIO
except ImportError:
from io import BytesIO as StringIO
import zipfile
import pytest
def test_verifying_zipfile():
if not hasattr(zipfile.ZipExtFile, '_update_crc'):
pytest.skip('No ZIP verification. Missing ZipExtFile._update_crc.')
sio = StringIO()
zf = zipfile.ZipFile(sio, 'w')
zf.writestr("one", b"first file")
zf.writestr("two", b"second file")
zf.writestr("three", b"third file")
zf.close()
# In default mode, VerifyingZipFile checks the hash of any read file
# mentioned with set_expected_hash(). Files not mentioned with
# set_expected_hash() are not checked.
vzf = wheel.install.VerifyingZipFile(sio, 'r')
vzf.set_expected_hash("one", hashlib.sha256(b"first file").digest())
vzf.set_expected_hash("three", "blurble")
vzf.open("one").read()
vzf.open("two").read()
try:
vzf.open("three").read()
except wheel.install.BadWheelFile:
pass
else:
raise Exception("expected exception 'BadWheelFile()'")
# In strict mode, VerifyingZipFile requires every read file to be
# mentioned with set_expected_hash().
vzf.strict = True
try:
vzf.open("two").read()
except wheel.install.BadWheelFile:
pass
else:
raise Exception("expected exception 'BadWheelFile()'")
vzf.set_expected_hash("two", None)
vzf.open("two").read()
def test_pop_zipfile():
sio = StringIO()
zf = wheel.install.VerifyingZipFile(sio, 'w')
zf.writestr("one", b"first file")
zf.writestr("two", b"second file")
zf.close()
try:
zf.pop()
except RuntimeError:
pass # already closed
else:
raise Exception("expected RuntimeError")
zf = wheel.install.VerifyingZipFile(sio, 'a')
zf.pop()
zf.close()
zf = wheel.install.VerifyingZipFile(sio, 'r')
assert len(zf.infolist()) == 1
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