diff options
Diffstat (limited to 'Lib/test/test_sys.py')
| -rw-r--r-- | Lib/test/test_sys.py | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py index 2caf09f..c056f9a 100644 --- a/Lib/test/test_sys.py +++ b/Lib/test/test_sys.py @@ -426,6 +426,23 @@ class SysModuleTest(unittest.TestCase): self.assertEqual(type(sys.int_info.bits_per_digit), int) self.assertEqual(type(sys.int_info.sizeof_digit), int) self.assertIsInstance(sys.hexversion, int) + + self.assertEqual(len(sys.hash_info), 5) + self.assertLess(sys.hash_info.modulus, 2**sys.hash_info.width) + # sys.hash_info.modulus should be a prime; we do a quick + # probable primality test (doesn't exclude the possibility of + # a Carmichael number) + for x in range(1, 100): + self.assertEqual( + pow(x, sys.hash_info.modulus-1, sys.hash_info.modulus), + 1, + "sys.hash_info.modulus {} is a non-prime".format( + sys.hash_info.modulus) + ) + self.assertIsInstance(sys.hash_info.inf, int) + self.assertIsInstance(sys.hash_info.nan, int) + self.assertIsInstance(sys.hash_info.imag, int) + self.assertIsInstance(sys.maxsize, int) self.assertIsInstance(sys.maxunicode, int) self.assertIsInstance(sys.platform, str) |