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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 )
}