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2023 iThome 鐵人賽
DAY 19
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Golang LineBot X GoogleDrive：LINE有各種限制!? 那就丟上Drive吧!系列 第 19 篇

Day19 調整SSM+補用testify測試

15th鐵人賽 golang go aws linebot
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昨天我們在server.go的地方會發現，要去調用SSM的地方，因為是一個一個參數去查，參數一多看起來就會很混亂，像下面這樣。

https://ithelp.ithome.com.tw/upload/images/20231004/201159902qktBxMqVF.png

如果我們能一次性地去查詢，應該會好看一點，那我們先回到internal\adapter\ssm，做一個FindParameters來提供這個功能。

  1. 在看AWS-SDK-GO的source code有提供那些function的時候，有找到GetParameters方法，既然官方有提供SDK，我們直接利用就好。首先在SSMGetParameterAPI新增GetParameters，輸入輸出直接複製官方source code上的格式就好。

    // ssm.go
type SSMGetParameterAPI interface {
	GetParameter(ctx context.Context,
		params *ssm.GetParameterInput,
		optFns ...func(*ssm.Options)) (*ssm.GetParameterOutput, error)

	GetParameters(ctx context.Context,
		params *ssm.GetParametersInput,
		optFns ...func(*ssm.Options)) (*ssm.GetParametersOutput, error)
}

  2. 接著寫FindParameters來封裝調用GetParameters，並返回一個map[string]string來存查詢到的結果。

    // ssm.go
func (s *SSM) FindParameters(c context.Context, api SSMGetParameterAPI, names []string) (map[string]string, error) {
	input := &ssm.GetParametersInput{
		Names: names,
	}
	results, err := api.GetParameters(c, input)
	if err != nil {
		fmt.Println(err.Error())
		return nil, err
	}
	parameters := make(map[string]string, len(results.Parameters))
	for _, parameter := range results.Parameters {
		if parameter.Name != nil && parameter.Value != nil {
			parameters[*parameter.Name] = *parameter.Value
		} else {
			fmt.Printf("Warning: Parameter %+v has a nil value\n", parameter)
		}
	}

	return parameters, nil
}

  3. 寫好後，我們來寫對應的Unit test，先在這邊實現我們測試用的GetParameters，依照讀到不同的參數名稱，製作對應的Parameter，append後返回結果。

    // ssm_test.go
type SSMGetParameterImpl struct{}

func (dt SSMGetParameterImpl) GetParameters(ctx context.Context,
	params *ssm.GetParametersInput,
	optFns ...func(*ssm.Options)) (*ssm.GetParametersOutput, error) {
	var parameters []types.Parameter

	for _, name := range params.Names {

		if name == "secret-name" {
			parameter := &types.Parameter{
				Name:  aws.String(name),
				Value: aws.String("secret-value"),
			}
			parameters = append(parameters, *parameter)
		}
		if name == "token-name" {
			parameter := &types.Parameter{
				Name:  aws.String(name),
				Value: aws.String("token-value"),
			}
			parameters = append(parameters, *parameter)
		}

	}

	output := &ssm.GetParametersOutput{
		Parameters: parameters,
	}

	return output, nil
}

  4. 下一步就可以正式寫TestFindParameters，並注入SSMGetParameterImpl到FindParameters，讓FindParameters會調用到我們上面實現的GetParameters。BTW，我們透過testify套件來做檢核，所以要記得import "github.com/stretchr/testify/assert"。

    func TestFindParameters(t *testing.T) {
	thisTime := time.Now()
	nowString := thisTime.Format("2006-01-02 15:04:05 Monday")
	t.Log("Starting unit test at " + nowString)

	// Creating an instance of the SSMGetParameterImpl
	api := &SSMGetParameterImpl{}

	// Mocking the configuration
	err := populateConfiguration(t)
	assert.NoError(t, err, "Error populating configuration")

	// Setting up the testify assertion instance

	// List of parameter names to fetch
	paramNames := []string{
		globalConfig.MockChannelSecret,
		globalConfig.MockChannelAccessToken,
	}

	// Testing FindParameters
	respParameters, err := testSSM.FindParameters(context.Background(), *api, paramNames)
	assert.NoError(t, err, "Error fetching parameters")

	// Asserting on the response
	expectedValues := map[string]string{
		globalConfig.MockChannelSecret:      "secret-value",
		globalConfig.MockChannelAccessToken: "token-value",
	}

	for paramName, expectedValue := range expectedValues {
		assert.Equal(t, expectedValue, respParameters[paramName], "Unexpected value for parameter: "+paramName)
	}

}

  5. 完整測試程式碼如下

    package ssm

import (
	"context"
	"encoding/json"
	"errors"
	"os"
	"testing"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/service/ssm"
	"github.com/aws/aws-sdk-go-v2/service/ssm/types"
	"github.com/stretchr/testify/assert"
)

type SSMGetParameterImpl struct{}

func (dt SSMGetParameterImpl) GetParameter(ctx context.Context,
	params *ssm.GetParameterInput,
	optFns ...func(*ssm.Options)) (*ssm.GetParameterOutput, error) {

	var parameter *types.Parameter

	if *params.Name == "secret-name" {
		parameter = &types.Parameter{Value: aws.String("secret-value")}
	}
	if *params.Name == "token-name" {
		parameter = &types.Parameter{Value: aws.String("token-value")}
	}

	output := &ssm.GetParameterOutput{
		Parameter: parameter,
	}

	return output, nil
}

func (dt SSMGetParameterImpl) GetParameters(ctx context.Context,
	params *ssm.GetParametersInput,
	optFns ...func(*ssm.Options)) (*ssm.GetParametersOutput, error) {
	var parameters []types.Parameter

	for _, name := range params.Names {

		if name == "secret-name" {

			parameter := &types.Parameter{
				Name:  aws.String(name),
				Value: aws.String("secret-value"),
			}
			parameters = append(parameters, *parameter)
		}
		if name == "token-name" {
			parameter := &types.Parameter{
				Name:  aws.String(name),
				Value: aws.String("token-value"),
			}
			parameters = append(parameters, *parameter)
		}

	}

	output := &ssm.GetParametersOutput{
		Parameters: parameters,
	}

	return output, nil
}

type Config struct {
	MockChannelSecret      string `json:"MockChannelSecret"`
	MockChannelAccessToken string `json:"MockChannelAccessToken"`
}

var configFileName = "config.json"

var globalConfig Config

func populateConfiguration(t *testing.T) error {
	content, err := os.ReadFile(configFileName)
	if err != nil {
		return err
	}

	text := string(content)

	err = json.Unmarshal([]byte(text), &globalConfig)
	if err != nil {
		return err
	}

	if globalConfig.MockChannelSecret == "" {
		msg := "You must supply a value for MockChannelSecret in " + configFileName
		return errors.New(msg)
	}
	if globalConfig.MockChannelAccessToken == "" {
		msg := "You must supply a value for MockChannelAccessToken in " + configFileName
		return errors.New(msg)
	}

	return nil
}

func TestFindParameter(t *testing.T) {
	thisTime := time.Now()
	nowString := thisTime.Format("2006-01-02 15:04:05 Monday")
	t.Log("Starting unit test at " + nowString)

	err := populateConfiguration(t)
	if err != nil {
		t.Fatal(err)
	}

	api := &SSMGetParameterImpl{}

	respSecret, err := testSSM.FindParameter(context.Background(), *api, globalConfig.MockChannelSecret)
	assert.NoError(t, err, "Error fetching MockChannelSecret")

	t.Log("MockChannelSecret value: " + respSecret)
	assert.Equal(t, "secret-value", respSecret, "Unexpected value for MockChannelSecret")

	respToken, err := testSSM.FindParameter(context.Background(), *api, globalConfig.MockChannelAccessToken)
	assert.NoError(t, err, "Error fetching MockChannelAccessToken")

	t.Log("MockChannelAccessToken value: " + respToken)
	assert.Equal(t, "token-value", respToken, "Unexpected value for MockChannelAccessToken")
}

func TestFindParameters(t *testing.T) {
	thisTime := time.Now()
	nowString := thisTime.Format("2006-01-02 15:04:05 Monday")
	t.Log("Starting unit test at " + nowString)

	// Creating an instance of the SSMGetParameterImpl
	api := &SSMGetParameterImpl{}

	// Mocking the configuration
	err := populateConfiguration(t)
	assert.NoError(t, err, "Error populating configuration")

	// Setting up the testify assertion instance

	// List of parameter names to fetch
	paramNames := []string{
		globalConfig.MockChannelSecret,
		globalConfig.MockChannelAccessToken,
	}

	// Testing FindParameters
	respParameters, err := testSSM.FindParameters(context.Background(), *api, paramNames)
	assert.NoError(t, err, "Error fetching parameters")

	// Asserting on the response
	expectedValues := map[string]string{
		globalConfig.MockChannelSecret:      "secret-value",
		globalConfig.MockChannelAccessToken: "token-value",
	}

	for paramName, expectedValue := range expectedValues {
		assert.Equal(t, expectedValue, respParameters[paramName], "Unexpected value for parameter: "+paramName)
	}

}

var testSSM *SSM

func TestMain(m *testing.M) {

	testSSM = NewSSM()

	os.Exit(m.Run())
}

  6. 最後，我們就可以把落落長的NewGinLambda()改成下面這樣，透過FindParameters一次取得參數，並且透過mustGetValue來把值取出來，這樣可以確保一定有找到參數才能開始初始化。

    func mustGetValue(parameters map[string]string, key string) string {
	value, ok := parameters[key]
	if !ok {
		log.Fatalf("%s not found. Exiting...\n", key)
	}
	return value
}

func NewGinLambda() *ginadapter.GinLambda {
	rootCtx, _ := context.WithCancel(context.Background()) //nolint
	ssmsvc := ssm.NewSSM()

	parameterNames := []string{
		"XXX_CHANNEL_SECRET",
		"XXX_CHANNEL_ACCESS_TOKEN",
		"GOOGLE_CLIENT_ID",
		"GOOGLE_CLIENT_SECRET",
		"REDIRECT_URL",
	}

	parameters, err := ssmsvc.FindParameters(rootCtx, ssmsvc.Client, parameterNames)
	if err != nil {
		log.Println(err)
	}

	lineSecret := mustGetValue(parameters, "XXX_CHANNEL_SECRET")
	lineAccessToken := mustGetValue(parameters, "XXX_CHANNEL_ACCESS_TOKEN")
	googleClientID := mustGetValue(parameters, "GOOGLE_CLIENT_ID")
	googleClientSecret := mustGetValue(parameters, "GOOGLE_CLIENT_SECRET")
	redirectURL := mustGetValue(parameters, "REDIRECT_URL")

	lineClientLambda, err := linebot.New(lineSecret, lineAccessToken)
	if err != nil {
		log.Fatal(err)
	}
	log.Println("LineBot Create Success")

	db := dynamodb.NewTableBasics("google-oauth")

	oauth := google.NewGoogleOAuth(googleClientID, googleClientSecret, redirectURL)

	app := app.NewApplication(rootCtx, db, oauth, lineClientLambda)
	ginRouter := initRouter(rootCtx, app)
	return ginadapter.New(ginRouter)
}

那今天就先到這邊，颱風天大家要注意安全，明天見囉~


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Day18 GoogleDrive API 04
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Day20 Login Service - OAuth Token存到Dynamodb
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1 則留言

0
MissterHao
iT邦新手 5 級 ‧ 2023-10-05 01:26:33

真貼心！

onepiece010938 iT邦新手 5 級 ‧ 2023-10-06 00:00:43 檢舉

必須的><

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