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Diffstat (limited to 'Lib/test/test_traceback.py')
| -rw-r--r-- | Lib/test/test_traceback.py | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Lib/test/test_traceback.py b/Lib/test/test_traceback.py index 33bdda0..2261ea9 100644 --- a/Lib/test/test_traceback.py +++ b/Lib/test/test_traceback.py @@ -232,6 +232,24 @@ class TracebackCases(unittest.TestCase): output = traceback.format_exception_only(Exception("projector")) self.assertEqual(output, ["Exception: projector\n"]) + def test_exception_is_None(self): + NONE_EXC_STRING = 'NoneType: None\n' + excfile = StringIO() + traceback.print_exception(None, None, None, file=excfile) + self.assertEqual(excfile.getvalue(), NONE_EXC_STRING) + + excfile = StringIO() + traceback.print_exc(None, file=excfile) + self.assertEqual(excfile.getvalue(), NONE_EXC_STRING) + + self.assertEqual(traceback.format_exc(None), NONE_EXC_STRING) + self.assertEqual( + traceback.format_exception(None, None, None), [NONE_EXC_STRING]) + self.assertEqual( + traceback.format_exception_only(None), [NONE_EXC_STRING]) + self.assertEqual( + traceback.format_exception_only(None, None), [NONE_EXC_STRING]) + class TracebackFormatTests(unittest.TestCase): |