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@@ -122,4 +122,23 @@ mod tests {
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values.sort();
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assert_eq!(items, values);
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}
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+
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+ #[test]
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+ fn is_balanced() {
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+ let values = vec![5, 3, 7, 1, 4, 6, 9];
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+ let mut root = Node::new(values[0]);
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+ for v in values[1..].iter() {
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+ root.insert(*v);
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+ }
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+ fn traverse(node: &Node<i32>) {
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+ assert!((node.balance_factor()).abs() <= 1);
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+ if let Some(ref left) = node.left {
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+ traverse(left);
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+ }
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+ if let Some(ref right) = node.right {
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+ traverse(right);
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+ }
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+ }
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+ traverse(&root);
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+ }
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}
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