test: cover compatibility alias extra arguments

tests/test_validate_typecheck_diagnostics.py

@@ -28,6 +28,10 @@ class ValidateTypecheckDiagnosticsTests(unittest.TestCase):
             "tests/typecheck_object_alias_method_do_good.claro",
             MODULE.EXPECTED_OK,
         )
+    def test_has_compatibility_chained_alias_method_extra_arg_fixture(self):
+        self.assertTrue(
+            (ROOT / "tests/typecheck_object_alias_method_call_extra_arg_bad.claro").exists()
+        )
 
     def test_includes_dedicated_yesno_field_check_success_fixture(self):
         self.assertIn(

tests/typecheck_object_alias_method_call_extra_arg_bad.claro

@@ -0,0 +1,12 @@
+CLASS Player
+    HAS score NUMBER
+
+    TEACH add points
+        CHECK TYPE points IS NUMBER
+    END
+END
+
+NEW Player player
+SET alias player
+SET second alias
+CALL second.add WITH 5, 6