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gh-130250: use support.swap_attr() in test and don't assume we're beginning with a clean system state (#130342)

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Irit Katriel 2025-02-20 11:29:18 +00:00 • committed by GitHub
parent 417372bd43
commit 048ee2d5ec
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1 changed files with 1 additions and 5 deletions
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6
Lib/test/test_traceback.py
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@ -511,14 +511,10 @@ class TracebackCases(unittest.TestCase):
self.assertEqual(output.getvalue(), "Exception: projector\n") self.assertEqual(output.getvalue(), "Exception: projector\n")
def test_print_last(self): def test_print_last(self):
self.assertIsNone(getattr(sys, "last_exc", None)) with support.swap_attr(sys, 'last_exc', ValueError(42)):
try:
sys.last_exc = ValueError(42)
output = StringIO() output = StringIO()
traceback.print_last(file=output) traceback.print_last(file=output)
self.assertEqual(output.getvalue(), "ValueError: 42\n") self.assertEqual(output.getvalue(), "ValueError: 42\n")
finally:
sys.last_exc = None
def test_format_exception_exc(self): def test_format_exception_exc(self):
e = Exception("projector") e = Exception("projector")