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

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Co-authored-by: Dong-hee Na <donghee.na92@gmail.com>
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Nikita Sobolev 2021-09-26 19:32:18 +03:00 • committed by GitHub
parent 7834ff26cb
commit f56268a2cd
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2 changed files with 14 additions and 0 deletions
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13
Lib/test/test_typing.py
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@ -4115,6 +4115,19 @@ class NamedTupleTests(BaseTestCase):
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__()

1
Misc/NEWS.d/next/Tests/2021-09-25-11-05-31.bpo-45280.3MA6lC.rst Normal file
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@ -0,0 +1 @@
Add a test case for empty :class:`typing.NamedTuple`.