Minor: added docs & test-case for updated 'Taffy::remove()' behaviour

src/tree/taffy_tree/tree.rs

@@ -229,6 +229,7 @@ impl Taffy {
  }
  }
 
+ // Remove "parent" references to a node when removing that node
  if let Some(children) = self.children.get(key) {
  for child in children.iter().copied() {
  self.parents[child.into()] = None;
@@ -666,6 +667,22 @@ mod tests {
  assert_eq!(taffy.child_count(node).unwrap(), 0);
  }
 
+ // Related to: https://github.com/DioxusLabs/taffy/issues/510
+ #[test]
+ fn remove_child_updates_parents() {
+ let mut taffy = Taffy::new();
+
+ let parent = taffy.new_leaf(Style::default()).unwrap();
+ let child = taffy.new_leaf(Style::default()).unwrap();
+
+ taffy.add_child(parent, child).unwrap();
+
+ taffy.remove(parent).unwrap();
+
+ // Once the parent is removed this shouldn't panic.
+ assert!(taffy.set_children(child, &[]).is_ok());
+ }
+
  #[test]
  fn replace_child_at_index() {
  let mut taffy = Taffy::new();