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Testing Dynamic Programming Coin Change Algorithms in hello-algo

This test suite evaluates coin change algorithms implemented using dynamic programming in Go. It validates both standard and space-optimized approaches for finding the minimum number of coins needed to make up a target amount.

Test Coverage Overview

The test suite provides comprehensive coverage of coin change algorithm implementations.

Key areas tested include:

Standard dynamic programming solution verification
Space-optimized dynamic programming implementation
Fixed test case with coins [1,2,5] and target amount 4
Output validation for minimum coin count calculation

Implementation Analysis

The testing approach employs Go’s native testing framework to validate dynamic programming solutions. The test structure implements parallel verification of two distinct algorithm implementations – a standard DP approach and a space-optimized version, allowing direct comparison of results.

Testing patterns include:

Direct function invocation testing
Output verification through fmt.Printf
Structured test case organization

Technical Details

Testing infrastructure includes:

Go testing package (testing)
Standard output verification (fmt)
Single test function implementation
Predefined test data structures
Multiple algorithm variant testing

Best Practices Demonstrated

The test implementation showcases several testing quality practices in Go.

Notable practices include:

Clear test function naming convention
Structured test data setup
Multiple implementation verification
Output validation through standard channels
Modular test case organization

krahets/hello-algo

zh-hant/codes/go/chapter_dynamic_programming/coin_change_test.go

            
// File: coin_change_test.go
// Created Time: 2023-07-23
// Author: Reanon ([email protected])

package chapter_dynamic_programming

import (
	"fmt"
	"testing"
)

func TestCoinChange(t *testing.T) {
	coins := []int{1, 2, 5}
	amt := 4

	// 動態規劃
	res := coinChangeDP(coins, amt)
	fmt.Printf("湊到目標金額所需的最少硬幣數量為 %d\n", res)

	// 空間最佳化後的動態規劃
	res = coinChangeDPComp(coins, amt)
	fmt.Printf("湊到目標金額所需的最少硬幣數量為 %d\n", res)
}