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gomock 为主方法中除第一个之外的所有子方法提供缺失的调用

来源：stackoverflow 2024-03-25 11:12:32 0浏览收藏

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**摘要：** 本文讨论了在使用 gomock 时为除第一个方法之外的所有子方法提供缺失调用的问题。在测试用例中，RemoveOTP() 方法返回错误，导致后续方法未被调用。本文探讨了使用 AnyTimes() 作为解决方案，并提出了替代建议，即模拟所有函数不返回错误，以执行所有代码并测试所有方法是否被调用一次。

问题内容

我有一个 go 方法，负责向用户发送 OTP 消息。它调用内部的四个方法（我说的是子方法）RemoveOTP、GetOneTimePassCode、SaveOTP和SendOTP。

文件名：user_usecase.go

func (u *UserUseCase) SendUserOTP(ctx context.Context, user *domain.User, mobileNumber string) error {
    var err error
    var OTPNumber string
    var expiration time.Time
    //Remove previous OTP if any in DB
    if err = u.Repo.RemoveOTP(ctx, user.ID, mobileNumber); err != nil {
        return err
    }

    //Generate OTP
    OTPNumber, expiration, err = u.TokenService.GetOneTimePassCode()
    if err != nil {
        return err
    }

    //Save Code in Database and then send
    otpDataInput := domain.UserMobileOtps{
        UserID:       user.ID,
        MobileNumber: mobileNumber,
        Email:        user.Email,
        OtpCode:      OTPNumber,
        ExpiredAt:    expiration,
    }
    if err = u.Repo.SaveOTP(ctx, otpDataInput); err != nil {
        return err
    }

    if err = u.SMSService.SendOTP(ctx, mobileNumber, OTPNumber); err != nil {
        return err
    }
    return nil
}

测试用例文件：user_usecase_test.go 和单元测试用例错误方法

// setup initializes common variables and returns them.
func setup(t *testing.T) (context.Context,
    *gomock.Controller,
    *mocks.MockUserRepository,
    usecase.UserUseCase,
    domain.User,
    *mocks.MockTokenService,
    *mocks.MockSMSService,
) {
    ctx := context.Background()
    ctrl := gomock.NewController(t)
    mockRepo := mocks.NewMockUserRepository(ctrl)
    mockTokenService := mocks.NewMockTokenService(ctrl)
    mockSmsService := mocks.NewMockSMSService(ctrl)
    uc := usecase.UserUseCase{Repo: mockRepo, TokenService: mockTokenService, SMSService: mockSmsService}
    user := domain.User{ID: 1}

    return ctx, ctrl, mockRepo, uc, user, mockTokenService, mockSmsService
}


func TestSendUserOTP_Error(t *testing.T) {
    ctx, ctrl, mockRepo, uc, user, mockTokenService, mockSmsService := setup(t)
    otpExpiration := time.Now().Add(time.Minute * 5)
    defer ctrl.Finish()

    someError := errors.New("some issue")
    mockRepo.EXPECT().RemoveOTP(ctx, user.ID, "XXXXXYYYYY").Return(someError).Times(1)
    mockTokenService.EXPECT().GetOneTimePassCode().Return("XXXYYY", otpExpiration, someError).Times(1)
    mockRepo.EXPECT().SaveOTP(ctx, domain.UserMobileOtps{UserID: user.ID, MobileNumber: "XXXXXYYYYY", Email: user.Email, OtpCode: "XXXYYY", ExpiredAt: otpExpiration}).Return(someError).Times(1)
    mockSmsService.EXPECT().SendOTP(ctx, "XXXXXYYYYY", "XXXYYY").Return(someError).Times(1)

    err := uc.SendVerificationOTP(ctx, &user, "XXXXXYYYYY")
    assert.Error(t, err)
    assert.Equal(t, someError, err)
}

现在在执行测试用例时，它不会为RemoveOTP抛出任何错误，但给出了其余的三个方法。这是确切的错误

TestSendUserOTP_Error
    controller.go:310: missing call(s) to *mocks.MockTokenService.GetOneTimePassCode() /project_path/user/usecase/user_usecase_test.go
    
    controller.go:310: missing call(s) to *mocks.MockUserRepository.SaveOTP(is equal to context.Background (*context.emptyCtx), is equal to {{0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC {0001-01-01 00:00:00 +0000 UTC false}} 0 4 XXXXXYYYYY  XXXYYY 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC {2023-10-06 10:34:25.951558924 +0530 IST m=+600.001514851 true} {0001-01-01 00:00:00 +0000 UTC false}} /project_path/user/usecase/user_usecase_test.go
  
    controller.go:310: missing call(s) to *mocks.MockSMSService.SendOTP(is equal to context.Background (*context.emptyCtx), is equal to XXXXXYYYYY (string), is equal to XXXYYY (string)) /project_path/user/usecase/user_usecase_test.go
    
    controller.go:310: aborting test due to missing call(s)
--- FAIL: TestSendUserOTP_Error (0.00s)

我不想使用像 AnyTimes() 这样的解决方案，因为我确信所有子方法都会被调用一次。对此的理想解决方案应该是什么？请提出建议。