Merge pull request RustPython#4165 from jopemachine/fix-test-prop

youknowone · web-flow · commit 48254acb4e23 · 2023-02-23T18:07:55.000+09:00
Fix `property.__set_name__` error message when arguments are invalid
diff --git a/Lib/test/test_property.py b/Lib/test/test_property.py
@@ -216,8 +216,6 @@ def __doc__(cls):
                 return 'Second'
         self.assertEqual(A.__doc__, 'Second')
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_property_set_name_incorrect_args(self):
         p = property()
 
diff --git a/vm/src/builtins/property.rs b/vm/src/builtins/property.rs
@@ -3,6 +3,7 @@
 */
 use super::{PyType, PyTypeRef};
 use crate::common::lock::PyRwLock;
+use crate::function::PosArgs;
 use crate::{
     class::PyClassImpl,
     function::{FuncArgs, PySetterValue},
@@ -122,6 +123,23 @@ impl PyProperty {
         *self.doc.write() = value;
     }
 
+    #[pymethod(magic)]
+    fn set_name(&self, args: PosArgs, vm: &VirtualMachine) -> PyResult<()> {
+        let arg_len = args.into_vec().len();
+
+        if arg_len != 2 {
+            Err(vm.new_exception_msg(
+                vm.ctx.exceptions.type_error.to_owned(),
+                format!(
+                    "__set_name__() takes 2 positional arguments but {} were given",
+                    arg_len
+                ),
+            ))
+        } else {
+            Ok(())
+        }
+    }
+
     // Python builder functions
 
     #[pymethod]
