Add itest for adding node in init

Author: beicause

itest/rust/src/engine_tests/node_test.rs

@@ -8,9 +8,11 @@
 use std::str::FromStr;
 
 use godot::builtin::{vslice, NodePath};
+use godot::classes::notify::NodeNotification;
 use godot::classes::{Node, Node3D, PackedScene, SceneTree};
 use godot::global;
 use godot::obj::{NewAlloc, NewGd};
+use godot::prelude::*;
 
 use crate::framework::{itest, TestContext};
 
@@ -92,3 +94,46 @@ fn node_call_group(ctx: &TestContext) {
     node.add_to_group("group");
     tree.call_group("group", "set_name", vslice!["name"]);
 }
+
+#[derive(GodotClass, Debug)]
+#[class(base=Node)]
+struct NodeChild {
+    child: Gd<Node>,
+    notifications: Vec<NodeNotification>,
+}
+
+#[godot_api]
+impl INode for NodeChild {
+    fn init(_: Base<Node>) -> Self {
+        let child = Node::new_alloc();
+        Self {
+            child,
+            notifications: vec![],
+        }
+    }
+
+    fn on_notification(&mut self, what: NodeNotification) {
+        match what {
+            NodeNotification::READY => self.notifications.push(NodeNotification::READY),
+            NodeNotification::PARENTED => self.notifications.push(NodeNotification::PARENTED),
+            NodeNotification::POSTINITIALIZE => {
+                self.notifications.push(NodeNotification::POSTINITIALIZE)
+            }
+            _ => {}
+        };
+    }
+}
+
+// https://github.com/godotengine/godot/issues/91023
+#[cfg(since_api = "4.4")]
+#[itest]
+fn node_add_child_in_init() {
+    let node = NodeChild::new_alloc();
+    let dup: Gd<NodeChild> = node.duplicate().unwrap().cast();
+    assert_eq!(
+        dup.bind().notifications,
+        vec![NodeNotification::POSTINITIALIZE,]
+    );
+    node.free();
+    dup.free();
+}