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Testing Binary Tree BFS Traversal Implementation in hello-algo

A comprehensive test suite for binary tree breadth-first search implementation in Go, validating level-order traversal functionality. This test validates the conversion of array data structures to binary trees and ensures correct level-order traversal output.

Test Coverage Overview

The test suite provides targeted coverage for binary tree level-order traversal operations.

Key areas tested include:

Array to binary tree conversion validation
Level-order traversal accuracy verification
Tree initialization and structure integrity
Output sequence validation for BFS traversal

Implementation Analysis

The testing approach utilizes Go’s native testing framework with a focus on functional verification. The implementation leverages helper functions from the project’s package for tree operations and visualization.

Notable patterns include:

Direct test case definition using SliceToTree utility
Visual tree structure verification
Output validation through slice comparison

Technical Details

Testing infrastructure includes:

Go testing package (testing.T)
Custom tree utilities from hello-algo/pkg
Tree visualization helpers (PrintTree)
Slice-based tree construction utilities

Best Practices Demonstrated

The test implementation showcases several testing best practices in Go.

Notable practices include:

Clear test function naming (TestLevelOrder)
Comprehensive test setup with visual verification
Use of helper functions for complex data structure creation
Clean separation of test initialization and execution

krahets/hello-algo

codes/go/chapter_tree/binary_tree_bfs_test.go

            
// File: binary_tree_bfs_test.go
// Created Time: 2022-11-26
// Author: Reanon ([email protected])

package chapter_tree

import (
	"fmt"
	"testing"

	. "github.com/krahets/hello-algo/pkg"
)

func TestLevelOrder(t *testing.T) {
	/* 初始化二叉树 */
	// 这里借助了一个从数组直接生成二叉树的函数
	root := SliceToTree([]any{1, 2, 3, 4, 5, 6, 7})
	fmt.Println("\n初始化二叉树: ")
	PrintTree(root)

	// 层序遍历
	nums := levelOrder(root)
	fmt.Println("\n层序遍历的节点打印序列 =", nums)
}