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Testing N-Queens Algorithm Implementation in hello-algo

This test suite validates the N-Queens problem implementation in Go, examining the algorithm’s ability to find all valid queen placements on an n×n chessboard. The tests verify both the solution count and placement validity for a 4×4 board configuration.

Test Coverage Overview

The test coverage focuses on validating the N-Queens problem solver functionality.

Tests 4×4 board configuration specifically
Verifies solution count accuracy
Validates queen placement patterns
Ensures non-conflicting queen positions

Implementation Analysis

The testing approach utilizes Go’s native testing framework to verify the backtracking algorithm implementation.

The test employs direct function calls to nQueens() with visual output formatting for solution verification. Implementation leverages Go’s testing.T struct for test organization and result reporting.

Technical Details

Testing tools and configuration:

Go testing package (testing)
fmt package for output formatting
Standard Go test runner
Direct console output for visual verification

Best Practices Demonstrated

The test suite demonstrates several testing best practices for algorithm verification.

Clear test case definition
Visual result verification
Focused test scope
Readable output formatting
Proper test function naming convention

krahets/hello-algo

zh-hant/codes/go/chapter_backtracking/n_queens_test.go

            
// File: n_queens_test.go
// Created Time: 2023-05-14
// Author: Reanon ([email protected])

package chapter_backtracking

import (
	"fmt"
	"testing"
)

func TestNQueens(t *testing.T) {
	n := 4
	res := nQueens(n)

	fmt.Println("輸入棋盤長寬為 ", n)
	fmt.Println("皇后放置方案共有 ", len(res), " 種")
	for _, state := range res {
		fmt.Println("--------------------")
		for _, row := range state {
			fmt.Println(row)
		}
	}
}