cpython/Lib/test/test_zipfile64.py

# Tests of the full ZIP64 functionality of zipfile
# The support.requires call is the only reason for keeping this separate
# from test_zipfile
from test import support

# XXX(nnorwitz): disable this test by looking for extralargefile resource,
# which doesn't exist.  This test takes over 30 minutes to run in general
# and requires more disk space than most of the buildbots.
support.requires(
        'extralargefile',
        'test requires loads of disk-space bytes and a long time to run'
    )

import zipfile, os, unittest
import time
import sys

from tempfile import TemporaryFile

from test.support import TESTFN, requires_zlib

TESTFN2 = TESTFN + "2"

# How much time in seconds can pass before we print a 'Still working' message.
_PRINT_WORKING_MSG_INTERVAL = 60

class TestsWithSourceFile(unittest.TestCase):
    def setUp(self):
        # Create test data.
        line_gen = ("Test of zipfile line %d." % i for i in range(1000000))
        self.data = '\n'.join(line_gen).encode('ascii')

        # And write it to a file.
        with open(TESTFN, "wb") as fp:
            fp.write(self.data)

    def zipTest(self, f, compression):
        # Create the ZIP archive.
        with zipfile.ZipFile(f, "w", compression) as zipfp:

            # It will contain enough copies of self.data to reach about 6 GiB of
            # raw data to store.
            filecount = 6*1024**3 // len(self.data)

            next_time = time.monotonic() + _PRINT_WORKING_MSG_INTERVAL
            for num in range(filecount):
                zipfp.writestr("testfn%d" % num, self.data)
                # Print still working message since this test can be really slow
                if next_time <= time.monotonic():
                    next_time = time.monotonic() + _PRINT_WORKING_MSG_INTERVAL
                    print((
                    '  zipTest still writing %d of %d, be patient...' %
                    (num, filecount)), file=sys.__stdout__)
                    sys.__stdout__.flush()

        # Read the ZIP archive
        with zipfile.ZipFile(f, "r", compression) as zipfp:
            for num in range(filecount):
                self.assertEqual(zipfp.read("testfn%d" % num), self.data)
                # Print still working message since this test can be really slow
                if next_time <= time.monotonic():
                    next_time = time.monotonic() + _PRINT_WORKING_MSG_INTERVAL
                    print((
                    '  zipTest still reading %d of %d, be patient...' %
                    (num, filecount)), file=sys.__stdout__)
                    sys.__stdout__.flush()

    def testStored(self):
        # Try the temp file first.  If we do TESTFN2 first, then it hogs
        # gigabytes of disk space for the duration of the test.
        with TemporaryFile() as f:
            self.zipTest(f, zipfile.ZIP_STORED)
            self.assertFalse(f.closed)
        self.zipTest(TESTFN2, zipfile.ZIP_STORED)

    @requires_zlib()
    def testDeflated(self):
        # Try the temp file first.  If we do TESTFN2 first, then it hogs
        # gigabytes of disk space for the duration of the test.
        with TemporaryFile() as f:
            self.zipTest(f, zipfile.ZIP_DEFLATED)
            self.assertFalse(f.closed)
        self.zipTest(TESTFN2, zipfile.ZIP_DEFLATED)

    def tearDown(self):
        for fname in TESTFN, TESTFN2:
            if os.path.exists(fname):
                os.remove(fname)


class OtherTests(unittest.TestCase):
    def testMoreThan64kFiles(self):
        # This test checks that more than 64k files can be added to an archive,
        # and that the resulting archive can be read properly by ZipFile
        with zipfile.ZipFile(TESTFN, mode="w", allowZip64=True) as zipf:
            zipf.debug = 100
            numfiles = (1 << 16) * 3//2
            for i in range(numfiles):
                zipf.writestr("foo%08d" % i, "%d" % (i**3 % 57))
            self.assertEqual(len(zipf.namelist()), numfiles)

        with zipfile.ZipFile(TESTFN, mode="r") as zipf2:
            self.assertEqual(len(zipf2.namelist()), numfiles)
            for i in range(numfiles):
                content = zipf2.read("foo%08d" % i).decode('ascii')
                self.assertEqual(content, "%d" % (i**3 % 57))

    def testMoreThan64kFilesAppend(self):
        with zipfile.ZipFile(TESTFN, mode="w", allowZip64=False) as zipf:
            zipf.debug = 100
            numfiles = (1 << 16) - 1
            for i in range(numfiles):
                zipf.writestr("foo%08d" % i, "%d" % (i**3 % 57))
            self.assertEqual(len(zipf.namelist()), numfiles)
            with self.assertRaises(zipfile.LargeZipFile):
                zipf.writestr("foo%08d" % numfiles, b'')
            self.assertEqual(len(zipf.namelist()), numfiles)

        with zipfile.ZipFile(TESTFN, mode="a", allowZip64=False) as zipf:
            zipf.debug = 100
            self.assertEqual(len(zipf.namelist()), numfiles)
            with self.assertRaises(zipfile.LargeZipFile):
                zipf.writestr("foo%08d" % numfiles, b'')
            self.assertEqual(len(zipf.namelist()), numfiles)

        with zipfile.ZipFile(TESTFN, mode="a", allowZip64=True) as zipf:
            zipf.debug = 100
            self.assertEqual(len(zipf.namelist()), numfiles)
            numfiles2 = (1 << 16) * 3//2
            for i in range(numfiles, numfiles2):
                zipf.writestr("foo%08d" % i, "%d" % (i**3 % 57))
            self.assertEqual(len(zipf.namelist()), numfiles2)

        with zipfile.ZipFile(TESTFN, mode="r") as zipf2:
            self.assertEqual(len(zipf2.namelist()), numfiles2)
            for i in range(numfiles2):
                content = zipf2.read("foo%08d" % i).decode('ascii')
                self.assertEqual(content, "%d" % (i**3 % 57))

    def tearDown(self):
        support.unlink(TESTFN)
        support.unlink(TESTFN2)

if __name__ == "__main__":
    unittest.main()