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bpo-26952: [argparse] clearer error when formatting an empty mutually… (GH-30099)

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Irit Katriel 2021-12-15 10:08:26 +00:00 • committed by GitHub
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7
Lib/test/test_argparse.py
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@ -2601,6 +2601,13 @@ class TestMutuallyExclusiveGroupErrors(TestCase):
'''
self.assertEqual(parser.format_help(), textwrap.dedent(expected))
def test_empty_group(self):
# See issue 26952
parser = argparse.ArgumentParser()
group = parser.add_mutually_exclusive_group()
with self.assertRaises(ValueError):
parser.parse_args(['-h'])
class MEMixin(object):
def test_failures_when_not_required(self):