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bpo-45280: Add test for empty NamedTuple in test_typing (GH-28559) (GH-28571)

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Co-authored-by: Dong-hee Na <donghee.na92@gmail.com>
(cherry picked from commit f56268a2cd)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
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Miss Islington (bot) 2021-09-26 10:09:50 -07:00 • committed by GitHub
parent c523022ba8
commit d452b2963b
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13
Lib/test/test_typing.py
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@ -4081,6 +4081,19 @@ def test_namedtuple_special_keyword_names(self):
self.assertEqual(a.typename, 'foo')
self.assertEqual(a.fields, [('bar', tuple)])
def test_empty_namedtuple(self):
NT = NamedTuple('NT')
class CNT(NamedTuple):
pass # empty body
for struct in [NT, CNT]:
with self.subTest(struct=struct):
self.assertEqual(struct._fields, ())
self.assertEqual(struct._field_defaults, {})
self.assertEqual(struct.__annotations__, {})
self.assertIsInstance(struct(), struct)
def test_namedtuple_errors(self):
with self.assertRaises(TypeError):
NamedTuple.__new__()