use pofk_algorithm::tree_algorithms::binary_tree_traversal::*;
use pofk_algorithm::tree_algorithms::diameter_of_tree::diameter_of_tree;
fn make_test_tree() -> Option<Box<TreeNode<i32>>> {
let mut root = Box::new(TreeNode::new(1));
let mut left = Box::new(TreeNode::new(2));
left.left = Some(Box::new(TreeNode::new(4)));
left.right = Some(Box::new(TreeNode::new(5)));
root.left = Some(left);
root.right = Some(Box::new(TreeNode::new(3)));
Some(root)
}
#[test]
fn test_diameter_of_tree() {
let tree = make_test_tree();
assert_eq!(diameter_of_tree(&tree), 3);
}