diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/test/test_os.py | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py index d79a32f..5205672 100644 --- a/Lib/test/test_os.py +++ b/Lib/test/test_os.py @@ -1248,6 +1248,7 @@ class URandomTests(unittest.TestCase): def test_urandom_value(self): data1 = os.urandom(16) + self.assertIsInstance(data1, bytes) data2 = os.urandom(16) self.assertNotEqual(data1, data2) @@ -1268,6 +1269,37 @@ class URandomTests(unittest.TestCase): self.assertNotEqual(data1, data2) +@unittest.skipUnless(hasattr(os, 'getrandom'), 'need os.getrandom()') +class GetRandomTests(unittest.TestCase): + def test_getrandom_type(self): + data = os.getrandom(16) + self.assertIsInstance(data, bytes) + self.assertEqual(len(data), 16) + + def test_getrandom0(self): + empty = os.getrandom(0) + self.assertEqual(empty, b'') + + def test_getrandom_random(self): + self.assertTrue(hasattr(os, 'GRND_RANDOM')) + + # Don't test os.getrandom(1, os.GRND_RANDOM) to not consume the rare + # resource /dev/random + + def test_getrandom_nonblock(self): + # The call must not fail. Check also that the flag exists + try: + os.getrandom(1, os.GRND_NONBLOCK) + except BlockingIOError: + # System urandom is not initialized yet + pass + + def test_getrandom_value(self): + data1 = os.getrandom(16) + data2 = os.getrandom(16) + self.assertNotEqual(data1, data2) + + # os.urandom() doesn't use a file descriptor when it is implemented with the # getentropy() function, the getrandom() function or the getrandom() syscall OS_URANDOM_DONT_USE_FD = ( |