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Issue #10276: test_zlib checks that inputs of 2 GB are handled correctly by

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crc32() and adler32(). Patch written by Steffen Daode Nurpmeso.
This commit is contained in:
Victor Stinner 2011-05-03 15:19:23 +02:00
parent 0a92d1849e
commit f9fb43492c
1 changed files with 38 additions and 3 deletions
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41
Lib/test/test_zlib.py
View file

@ -1,10 +1,16 @@
import unittest
from test import test_support
from test.test_support import TESTFN, run_unittest, import_module, unlink, requires
import binascii
import random
from test.test_support import precisionbigmemtest, _1G
import sys
zlib = test_support.import_module('zlib')
try:
import mmap
except ImportError:
mmap = None
zlib = import_module('zlib')
class ChecksumTestCase(unittest.TestCase):
@ -66,6 +72,34 @@ class ChecksumTestCase(unittest.TestCase):
zlib.crc32('spam', (2**31)))
# Issue #10276 - check that inputs of 2 GB are handled correctly.
# Be aware of issues #1202, #8650, #8651 and #10276
class ChecksumBigBufferTestCase(unittest.TestCase):
int_max = 0x7FFFFFFF
@unittest.skipUnless(mmap, "mmap() is not available.")
def test_big_buffer(self):
if sys.platform[:3] == 'win' or sys.platform == 'darwin':
requires('largefile',
'test requires %s bytes and a long time to run' %
str(self.int_max))
try:
with open(TESTFN, "wb+") as f:
f.seek(self.int_max-4)
f.write("asdf")
f.flush()
try:
m = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
self.assertEqual(zlib.crc32(m), 0x709418e7)
self.assertEqual(zlib.adler32(m), -2072837729)
finally:
m.close()
except (IOError, OverflowError):
raise unittest.SkipTest("filesystem doesn't have largefile support")
finally:
unlink(TESTFN)
class ExceptionTestCase(unittest.TestCase):
# make sure we generate some expected errors
def test_badlevel(self):
@ -546,8 +580,9 @@ LAERTES
def test_main():
test_support.run_unittest(
run_unittest(
ChecksumTestCase,
ChecksumBigBufferTestCase,
ExceptionTestCase,
CompressTestCase,
CompressObjectTestCase