diff options
Diffstat (limited to 'Lib/test/test_os.py')
| -rw-r--r-- | Lib/test/test_os.py | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py index e573bd2..8bc8ba9 100644 --- a/Lib/test/test_os.py +++ b/Lib/test/test_os.py @@ -15,6 +15,7 @@ from test import support import contextlib import mmap import uuid +from test.script_helper import assert_python_ok # Detect whether we're on a Linux system that uses the (now outdated # and unmaintained) linuxthreads threading library. There's an issue @@ -611,14 +612,33 @@ class DevNullTests(unittest.TestCase): self.assertEqual(f.read(), b'') class URandomTests(unittest.TestCase): - def test_urandom(self): - try: - self.assertEqual(len(os.urandom(1)), 1) - self.assertEqual(len(os.urandom(10)), 10) - self.assertEqual(len(os.urandom(100)), 100) - self.assertEqual(len(os.urandom(1000)), 1000) - except NotImplementedError: - pass + def test_urandom_length(self): + self.assertEqual(len(os.urandom(0)), 0) + self.assertEqual(len(os.urandom(1)), 1) + self.assertEqual(len(os.urandom(10)), 10) + self.assertEqual(len(os.urandom(100)), 100) + self.assertEqual(len(os.urandom(1000)), 1000) + + def test_urandom_value(self): + data1 = os.urandom(16) + data2 = os.urandom(16) + self.assertNotEqual(data1, data2) + + def get_urandom_subprocess(self, count): + code = '\n'.join(( + 'import os, sys', + 'data = os.urandom(%s)' % count, + 'sys.stdout.buffer.write(data)', + 'sys.stdout.buffer.flush()')) + out = assert_python_ok('-c', code) + stdout = out[1] + self.assertEqual(len(stdout), 16) + return stdout + + def test_urandom_subprocess(self): + data1 = self.get_urandom_subprocess(16) + data2 = self.get_urandom_subprocess(16) + self.assertNotEqual(data1, data2) @contextlib.contextmanager def _execvpe_mockup(defpath=None): |