Back to Repositories

Testing N-Queens Backtracking Algorithm Implementation in hello-algo

This test suite validates the N-Queens problem solution implementation in Go, focusing on verifying correct placement of queens on an n×n chessboard where no two queens can attack each other. The tests examine the backtracking algorithm’s ability to find all valid solutions for a given board size.

Test Coverage Overview

The test coverage focuses on validating the nQueens function with a 4×4 board configuration.

Tests the core functionality of finding all valid queen placements
Verifies the total number of solutions generated
Validates the output format of each solution state
Ensures solutions meet N-Queens problem constraints

Implementation Analysis

The testing approach utilizes Go’s native testing package with a straightforward test case structure.

The implementation employs standard Go testing patterns with:

Direct function invocation testing
Output visualization using fmt package
Sequential solution verification
Visual representation of board states

Technical Details

Testing infrastructure includes:

Go testing framework (testing package)
fmt package for output formatting
Single test function structure
Visual board state representation
Solution count verification

Best Practices Demonstrated

The test implementation showcases several testing best practices in Go.

Clear test function naming convention
Structured output formatting
Visual result verification
Comprehensive solution validation
Modular test case organization

krahets/hello-algo

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("输入棋盘长宽为 ", n)
	fmt.Println("皇后放置方案共有 ", len(res), " 种")
	for _, state := range res {
		fmt.Println("--------------------")
		for _, row := range state {
			fmt.Println(row)
		}
	}
}