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Testing Recursive Algorithm Implementations in hello-algo

This test suite evaluates recursive algorithms implementation in Go, focusing on different recursion patterns including standard recursion, loop-based recursion simulation, and tail recursion. The tests verify sum calculations and Fibonacci sequence generation, demonstrating various recursive approaches in algorithmic problem-solving.

Test Coverage Overview

The test suite provides comprehensive coverage of recursive function implementations.

Key areas tested include:

Standard recursive sum calculation
Iterative simulation of recursion
Tail recursion implementation
Fibonacci sequence generation

Edge cases are verified through input parameter n=5, ensuring consistent behavior across different recursive approaches.

Implementation Analysis

The testing approach utilizes Go’s native testing package to validate multiple recursion patterns. The implementation employs the testing.T framework for assertions and uses fmt for output verification.

Technical patterns include:

Direct function result comparison
Console output validation
Multiple recursive implementation testing in a single test case

Technical Details

Testing tools and configuration:

Go testing package (testing)
Standard output handling (fmt)
Single test function methodology
Direct console output for result verification
Integrated test runner configuration

Best Practices Demonstrated

The test implementation showcases several testing quality practices in Go.

Notable practices include:

Clear test function naming convention
Systematic testing of multiple implementation variants
Consistent output formatting
Single responsibility principle in test organization
Clear separation of different recursive approaches

krahets/hello-algo

codes/go/chapter_computational_complexity/recursion_test.go

            
// File: recursion_test.go
// Created Time: 2023-08-28
// Author: Reanon ([email protected])

package chapter_computational_complexity

import (
	"fmt"
	"testing"
)

/* Driver Code */
func TestRecursion(t *testing.T) {
	n := 5
	res := recur(n)
	fmt.Println("\n递归函数的求和结果 res = ", res)

	res = forLoopRecur(n)
	fmt.Println("\n使用迭代模拟递归求和结果 res = ", res)

	res = tailRecur(n, 0)
	fmt.Println("\n尾递归函数的求和结果 res = ", res)

	res = fib(n)
	fmt.Println("\n斐波那契数列的第", n, "项为", res)
}