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Testing Binary Tree Level-Order Traversal in hello-algo

This test suite validates the Binary Tree Breadth-First Search (BFS) implementation in Go, specifically testing the level-order traversal functionality. The tests ensure correct tree initialization and traversal ordering while demonstrating proper tree node handling.

Test Coverage Overview

The test coverage focuses on validating level-order traversal operations on a binary tree structure.

Tests binary tree initialization from array input
Verifies correct level-order traversal sequence
Validates node ordering and hierarchy preservation
Covers tree visualization and output formatting

Implementation Analysis

The testing approach utilizes Go’s native testing framework with custom tree utilities.

Implementation features include:

Direct array-to-tree conversion using SliceToTree utility
Visual tree structure verification via PrintTree
Integration with custom package utilities from hello-algo/pkg
Structured test output formatting for clarity

Technical Details

Testing infrastructure includes:

Go testing package (testing.T)
Custom tree node structure implementation
Utility functions for tree manipulation
Console output formatting for visual verification
Integration with hello-algo package dependencies

Best Practices Demonstrated

The test implementation showcases several testing best practices in Go.

Clear test function naming and organization
Proper test setup and initialization
Visual output for debugging and verification
Modular test structure with utility function usage
Effective use of package imports and dependencies

krahets/hello-algo

zh-hant/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) {
	/* 初始化二元樹 */
	// 這裡藉助了一個從陣列直接生成二元樹的函式
	root := SliceToTree([]any{1, 2, 3, 4, 5, 6, 7})
	fmt.Println("\n初始化二元樹: ")
	PrintTree(root)

	// 層序走訪
	nums := levelOrder(root)
	fmt.Println("\n層序走訪的節點列印序列 =", nums)
}