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Testing QuickSort Optimization Implementations in hello-algo

This test suite implements and validates different variants of QuickSort algorithm implementations in Go, including standard QuickSort, median-pivot optimization, and tail-call optimization. The tests verify the correct sorting functionality and optimization techniques.

Test Coverage Overview

The test suite provides comprehensive coverage of three QuickSort implementations:

Standard QuickSort implementation
Median-pivot optimized QuickSort
Tail-call optimized QuickSort

Each test case validates sorting functionality using a common input array [4,1,3,1,5,2], ensuring consistent behavior across implementations.

Implementation Analysis

The testing approach utilizes Go’s native testing framework with distinct test functions for each QuickSort variant. Each implementation is encapsulated in its own struct type, demonstrating object-oriented testing patterns in Go. The tests employ direct method calls and use fmt.Println for result verification.

The implementation showcases Go-specific features like struct methods and slice manipulation.

Technical Details

Testing Tools & Configuration:

Go testing package (testing)
fmt package for output formatting
Struct-based implementation organization
Zero-dependency test structure
Standard Go test execution environment

Best Practices Demonstrated

The test suite demonstrates several testing best practices including clear test function naming, consistent test data usage, and separation of concerns through struct-based implementation separation. Each test focuses on a specific optimization strategy while maintaining a consistent interface, facilitating maintenance and clarity.

The code organization follows Go conventions with proper package structure and clear documentation comments.

krahets/hello-algo

zh-hant/codes/go/chapter_sorting/quick_sort_test.go

            
// File: quick_sort_test.go
// Created Time: 2022-12-12
// Author: msk397 ([email protected])

package chapter_sorting

import (
	"fmt"
	"testing"
)

// 快速排序
func TestQuickSort(t *testing.T) {
	q := quickSort{}
	nums := []int{4, 1, 3, 1, 5, 2}
	q.quickSort(nums, 0, len(nums)-1)
	fmt.Println("快速排序完成後 nums = ", nums)
}

// 快速排序（中位基準數最佳化）
func TestQuickSortMedian(t *testing.T) {
	q := quickSortMedian{}
	nums := []int{4, 1, 3, 1, 5, 2}
	q.quickSort(nums, 0, len(nums)-1)
	fmt.Println("快速排序（中位基準數最佳化）完成後 nums = ", nums)
}

// 快速排序（尾遞迴最佳化）
func TestQuickSortTailCall(t *testing.T) {
	q := quickSortTailCall{}
	nums := []int{4, 1, 3, 1, 5, 2}
	q.quickSort(nums, 0, len(nums)-1)
	fmt.Println("快速排序（尾遞迴最佳化）完成後 nums = ", nums)
}