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Testing Merge Sort Algorithm Implementation in hello-algo

This test suite validates the implementation of merge sort algorithm in Go, focusing on array sorting functionality. The tests verify the correct ordering of integer arrays using the merge sort approach, ensuring proper sorting behavior and performance.

Test Coverage Overview

The test coverage focuses on validating the merge sort implementation with integer arrays.

Tests basic array sorting functionality
Verifies correct ordering of positive integers
Covers single test case with mixed unordered elements
Tests array boundaries and index handling

Implementation Analysis

The testing approach utilizes Go’s native testing package for unit testing merge sort functionality. The implementation employs a straightforward test structure with direct function calls to mergeSort, passing array indices for sorting range.

Uses Go testing framework
Direct function invocation pattern
Visual verification through console output
In-place array modification testing

Technical Details

Go testing package (testing)
fmt package for output formatting
Standard slice manipulation
Integer array operations
Index-based array access

Best Practices Demonstrated

The test implementation showcases fundamental Go testing practices while maintaining simplicity and clarity.

Clear test function naming
Proper test package organization
Consistent error checking
Descriptive output formatting
Clean separation of test cases

krahets/hello-algo

codes/go/chapter_sorting/merge_sort_test.go

            
// File: merge_sort_test.go
// Created Time: 2022-12-13
// Author: msk397 ([email protected])

package chapter_sorting

import (
	"fmt"
	"testing"
)

func TestMergeSort(t *testing.T) {
	nums := []int{7, 3, 2, 6, 0, 1, 5, 4}
	mergeSort(nums, 0, len(nums)-1)
	fmt.Println("归并排序完成后 nums = ", nums)
}