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Diffstat (limited to 'Lib/test/test_warnings.py')
| -rw-r--r-- | Lib/test/test_warnings.py | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Lib/test/test_warnings.py b/Lib/test/test_warnings.py index 0f2e089408..fb01b83e0c 100644 --- a/Lib/test/test_warnings.py +++ b/Lib/test/test_warnings.py @@ -631,6 +631,15 @@ class _WarningsTests(BaseTest, unittest.TestCase): finally: globals_dict['__file__'] = oldfile + def test_stderr_none(self): + rc, stdout, stderr = assert_python_ok("-c", + "import sys; sys.stderr = None; " + "import warnings; warnings.simplefilter('always'); " + "warnings.warn('Warning!')") + self.assertEqual(stdout, b'') + self.assertNotIn(b'Warning!', stderr) + self.assertNotIn(b'Error', stderr) + class WarningsDisplayTests(BaseTest): |