diff options
Diffstat (limited to 'Lib/test/test_mmap.py')
| -rw-r--r-- | Lib/test/test_mmap.py | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py index a3de398b9e..d066368726 100644 --- a/Lib/test/test_mmap.py +++ b/Lib/test/test_mmap.py @@ -721,6 +721,13 @@ class LargeMmapTests(unittest.TestCase): def test_large_filesize(self): with self._make_test_file(0x17FFFFFFF, b" ") as f: + if sys.maxsize < 0x180000000: + # On 32 bit platforms the file is larger than sys.maxsize so + # mapping the whole file should fail -- Issue #16743 + with self.assertRaises(OverflowError): + mmap.mmap(f.fileno(), 0x180000000, access=mmap.ACCESS_READ) + with self.assertRaises(ValueError): + mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ) with mmap.mmap(f.fileno(), 0x10000, access=mmap.ACCESS_READ) as m: self.assertEqual(m.size(), 0x180000000) |