[Python-checkins] cpython (2.7): Issue #10276: test_zlib checks that inputs of 2 GB are handled correctly by

Tue May 3 15:19:34 CEST 2011

http://hg.python.org/cpython/rev/f43213129ba8
changeset: 69800:f43213129ba8
branch: 2.7
user: Victor Stinner <victor.stinner at haypocalc.com>
date: Tue May 03 15:19:23 2011 +0200
summary:
 Issue #10276: test_zlib checks that inputs of 2 GB are handled correctly by
crc32() and adler32(). Patch written by Steffen Daode Nurpmeso.
files:
 Lib/test/test_zlib.py | 41 ++++++++++++++++++++++++++++--
 1 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -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 @@
 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 @@
 
 
 def test_main():
- test_support.run_unittest(
+ run_unittest(
 ChecksumTestCase,
+ ChecksumBigBufferTestCase,
 ExceptionTestCase,
 CompressTestCase,
 CompressObjectTestCase
-- 
Repository URL: http://hg.python.org/cpython
