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// File: avl_tree_test.go
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// Created Time: 2023-01-08
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// Author: Reanon (793584285@qq.com)
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package chapter_tree
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import (
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"fmt"
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"testing"
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. "github.com/krahets/hello-algo/pkg"
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)
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func TestAVLTree(t *testing.T) {
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/* 初始化空 AVL 树 */
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tree := newAVLTree()
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/* 插入结点 */
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// 请关注插入结点后，AVL 树是如何保持平衡的
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testInsert(tree, 1)
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testInsert(tree, 2)
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testInsert(tree, 3)
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testInsert(tree, 4)
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testInsert(tree, 5)
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testInsert(tree, 8)
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testInsert(tree, 7)
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testInsert(tree, 9)
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testInsert(tree, 10)
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testInsert(tree, 6)
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/* 插入重复结点 */
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testInsert(tree, 7)
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/* 删除结点 */
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// 请关注删除结点后，AVL 树是如何保持平衡的
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testRemove(tree, 8) // 删除度为 0 的结点
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testRemove(tree, 5) // 删除度为 1 的结点
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testRemove(tree, 4) // 删除度为 2 的结点
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/* 查询结点 */
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node := tree.search(7)
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fmt.Printf("\n查找到的结点对象为 %#v ，结点值 = %d \n", node, node.Val)
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}
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func testInsert(tree *avlTree, val int) {
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tree.insert(val)
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fmt.Printf("\n插入结点 %d 后，AVL 树为 \n", val)
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PrintTree(tree.root)
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}
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func testRemove(tree *avlTree, val int) {
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tree.remove(val)
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fmt.Printf("\n删除结点 %d 后，AVL 树为 \n", val)
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PrintTree(tree.root)
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}
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