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Testing Recursive Binary Search Implementation in hello-algo

This test suite validates the recursive binary search implementation in Go, focusing on both successful and unsuccessful search scenarios. The tests verify the algorithm’s ability to find target elements in a sorted array and handle cases where the target is not present.

Test Coverage Overview

The test coverage encompasses core binary search functionality with specific focus on index retrieval.

Tests successful element search with target value 6
Validates behavior for non-existent elements (99)
Covers sorted array traversal and index reporting
Includes boundary condition testing

Implementation Analysis

The testing approach utilizes Go’s native testing framework with a straightforward single-function test structure.

The implementation employs the testing.T struct for test execution and fmt for output validation. The test demonstrates clean separation of concerns with distinct test cases for found and not-found scenarios.

Technical Details

Testing Framework: Go’s built-in testing package
Output Handling: fmt package for result verification
Test Runner: go test command
File Organization: Follows Go package structure conventions
Data Structure: Slice-based sorted array input

Best Practices Demonstrated

The test suite exhibits several Go testing best practices including clear test case isolation and explicit expected outcomes.

Descriptive test function naming
Proper test package organization
Clear input data preparation
Explicit test case documentation
Structured output validation

krahets/hello-algo

codes/go/chapter_divide_and_conquer/binary_search_recur_test.go

            
// File: binary_search_recur_test.go
// Created Time: 2023-07-19
// Author: hongyun-robot ([email protected])

package chapter_divide_and_conquer

import (
	"fmt"
	"testing"
)

func TestBinarySearch(t *testing.T) {
	nums := []int{1, 3, 6, 8, 12, 15, 23, 26, 31, 35}
	target := 6
	noTarget := 99
	targetIndex := binarySearch(nums, target)
	fmt.Println("目标元素 6 的索引 = ", targetIndex)
	noTargetIndex := binarySearch(nums, noTarget)
	fmt.Println("不存在目标元素的索引 = ", noTargetIndex)
}