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[3.12] gh-118569: Add a test for dynamic PEP695 classes (GH-118570) (#118574)

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gh-118569: Add a test for dynamic PEP695 classes (GH-118570)
(cherry picked from commit 5f547585fa)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
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Miss Islington (bot) 2024-05-04 17:26:30 +02:00 • committed by GitHub
parent 7da5737bd8
commit 53e8bdd1e6
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1 changed files with 25 additions and 0 deletions
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Lib/test/test_type_params.py
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@ -708,6 +708,31 @@ class TypeParamsClassScopeTest(unittest.TestCase):
self.assertIn(int, C.D.__bases__) self.assertIn(int, C.D.__bases__)
self.assertIs(C.D.x, str) self.assertIs(C.D.x, str)
class DynamicClassTest(unittest.TestCase):
def _set_type_params(self, ns, params):
ns['__type_params__'] = params
def test_types_new_class_with_callback(self):
T = TypeVar('T', infer_variance=True)
Klass = types.new_class('Klass', (Generic[T],), {},
lambda ns: self._set_type_params(ns, (T,)))
self.assertEqual(Klass.__bases__, (Generic,))
self.assertEqual(Klass.__orig_bases__, (Generic[T],))
self.assertEqual(Klass.__type_params__, (T,))
self.assertEqual(Klass.__parameters__, (T,))
def test_types_new_class_no_callback(self):
T = TypeVar('T', infer_variance=True)
Klass = types.new_class('Klass', (Generic[T],), {})
self.assertEqual(Klass.__bases__, (Generic,))
self.assertEqual(Klass.__orig_bases__, (Generic[T],))
self.assertEqual(Klass.__type_params__, ()) # must be explicitly set
self.assertEqual(Klass.__parameters__, (T,))
class TypeParamsManglingTest(unittest.TestCase): class TypeParamsManglingTest(unittest.TestCase):
def test_mangling(self): def test_mangling(self):
class Foo[__T]: class Foo[__T]: