bpo-33569 Preserve type information with dataclasses.InitVar (GH-8927)
diff --git a/Lib/test/test_dataclasses.py b/Lib/test/test_dataclasses.py
index 8672106..53e8443 100755
--- a/Lib/test/test_dataclasses.py
+++ b/Lib/test/test_dataclasses.py
@@ -1097,6 +1097,12 @@
c = C(init_param=10)
self.assertEqual(c.x, 20)
+ def test_init_var_preserve_type(self):
+ self.assertEqual(InitVar[int].type, int)
+
+ # Make sure the repr is correct.
+ self.assertEqual(repr(InitVar[int]), 'dataclasses.InitVar[int]')
+
def test_init_var_inheritance(self):
# Note that this deliberately tests that a dataclass need not
# have a __post_init__ function if it has an InitVar field.