diff options
| -rw-r--r-- | Lib/test/test_zlib.py | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py index c09dee3..26cf309 100644 --- a/Lib/test/test_zlib.py +++ b/Lib/test/test_zlib.py @@ -2,7 +2,7 @@ import unittest from test.test_support import TESTFN, run_unittest, import_module, unlink, requires import binascii import random -from test.test_support import precisionbigmemtest, _1G +from test.test_support import precisionbigmemtest, _1G, _4G import sys try: @@ -72,20 +72,29 @@ class ChecksumTestCase(unittest.TestCase): zlib.crc32('spam', (2**31))) -# Issue #11277 - check that inputs of 2 GB are handled correctly. -# Be aware of issues #1202, #8650, #8651 and #10276 +# Issue #11277 - check that inputs of 2 GB (or 1 GB on 32 bits system) are +# handled correctly. Be aware of issues #1202. We cannot test a buffer of 4 GB +# or more (#8650, #8651 and #10276), because the zlib stores the buffer size +# into an int. class ChecksumBigBufferTestCase(unittest.TestCase): - int_max = 0x7FFFFFFF + if sys.maxsize > _4G: + # (64 bits system) crc32() and adler32() stores the buffer size into an + # int, the maximum filesize is INT_MAX (0x7FFFFFFF) + filesize = 0x7FFFFFFF + else: + # (32 bits system) On a 32 bits OS, a process cannot usually address + # more than 2 GB, so test only 1 GB + filesize = _1G @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)) + str(self.filesize)) try: with open(TESTFN, "wb+") as f: - f.seek(self.int_max-4) + f.seek(self.filesize-4) f.write("asdf") f.flush() m = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ) |