gh-152315: Cover metaclass descriptors

Author: SurenNihalani

Lib/test/test_call.py

@@ -940,6 +940,14 @@ def register_pack(dog_type):
     def track_pack(cls, scent):
         pass
 
+    @classmethod
+    def classify_pack(dog_type):
+        pass
+
+    @staticmethod
+    def tag_pack(label):
+        pass
+
 class Poodle(metaclass=DogMeta):
     pass
 
@@ -1042,6 +1050,18 @@ def test_metaclass_method_too_many_args_does_not_suggest_missing_self(self):
         with self.check_raises_type_error(msg):
             Poodle.track_pack("trail", "river")
 
+    def test_metaclass_classmethod_does_not_suggest_missing_self(self):
+        """A classmethod on a metaclass should not suggest instance self."""
+        msg = "DogMeta.classify_pack() takes 1 positional argument but 2 were given"
+        with self.check_raises_type_error(msg):
+            Poodle.classify_pack("standard")
+
+    def test_metaclass_staticmethod_does_not_suggest_missing_self(self):
+        """A staticmethod on a metaclass should not suggest instance self."""
+        msg = "DogMeta.tag_pack() takes 1 positional argument but 2 were given"
+        with self.check_raises_type_error(msg):
+            Poodle.tag_pack("show", "working")
+
 @cpython_only
 class TestErrorMessagesSuggestions(unittest.TestCase):
     @contextlib.contextmanager