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gh-128613: Increase typing.Concatenate coverage (#128614)

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sobolevn 2025-01-08 15:02:47 +03:00 • committed by GitHub
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12
Lib/test/test_typing.py
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@ -10129,6 +10129,18 @@ class ConcatenateTests(BaseTestCase):
self.assertEqual(C4.__args__, (Concatenate[int, T, P], T))
self.assertEqual(C4.__parameters__, (T, P))
def test_invalid_uses(self):
with self.assertRaisesRegex(TypeError, 'Concatenate of no types'):
Concatenate[()]
with self.assertRaisesRegex(
TypeError,
(
'The last parameter to Concatenate should be a '
'ParamSpec variable or ellipsis'
),
):
Concatenate[int]
def test_var_substitution(self):
T = TypeVar('T')
P = ParamSpec('P')