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hello-algo/codes/go/chapter_tree/avl_tree_test.go

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