https://github.com/python/cpython/commit/eb26e170695f15714b5e2ae0c0b83aa790c97869
commit: eb26e170695f15714b5e2ae0c0b83aa790c97869
branch: main
author: sobolevn <[email protected]>
committer: sobolevn <[email protected]>
date: 2025-01-08T15:02:47+03:00
summary:
gh-128613: Increase `typing.Concatenate` coverage (#128614)
files:
M Lib/test/test_typing.py
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 0bb9ada221e985..a75dac4a6102bf 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -10129,6 +10129,18 @@ def test_valid_uses(self):
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')
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