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// File: array_binary_tree_test.go
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// Created Time: 2023-07-24
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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 TestArrayBinaryTree(t *testing.T) {
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// 初始化二元樹
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// 這裡藉助了一個從陣列直接生成二元樹的函式
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arr := []any{1, 2, 3, 4, nil, 6, 7, 8, 9, nil, nil, 12, nil, nil, 15}
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root := SliceToTree(arr)
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fmt.Println("\n初始化二元樹")
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fmt.Println("二元樹的陣列表示：")
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fmt.Println(arr)
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fmt.Println("二元樹的鏈結串列表示：")
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PrintTree(root)
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// 陣列表示下的二元樹類別
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abt := newArrayBinaryTree(arr)
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// 訪問節點
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i := 1
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l := abt.left(i)
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r := abt.right(i)
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p := abt.parent(i)
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fmt.Println("\n當前節點的索引為", i, "，值為", abt.val(i))
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fmt.Println("其左子節點的索引為", l, "，值為", abt.val(l))
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fmt.Println("其右子節點的索引為", r, "，值為", abt.val(r))
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fmt.Println("其父節點的索引為", p, "，值為", abt.val(p))
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// 走訪樹
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res := abt.levelOrder()
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fmt.Println("\n層序走訪為：", res)
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res = abt.preOrder()
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fmt.Println("前序走訪為：", res)
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res = abt.inOrder()
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fmt.Println("中序走訪為：", res)
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res = abt.postOrder()
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fmt.Println("後序走訪為：", res)
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}
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