分享高效的Golang开发步骤实践

// 文件：user.go

package main

type User struct {
    ID   int
    Name string
}

type UserRepository interface {
    Save(user *User) error
    FindByID(id int) (*User, error)
}

// 文件：user_test.go

package main

import (
    "testing"
)

func TestUserRepository_Save(t *testing.T) {
    repository := NewUserRepository()

    user := &User{
        ID:   1,
        Name: "Alice",
    }
    err := repository.Save(user)

    if err != nil {
        t.Errorf("Save() error = %v, want nil", err)
    }
}

func TestUserRepository_FindByID(t *testing.T) {
    repository := NewUserRepository()

    user, err := repository.FindByID(1)

    if err != nil {
        t.Errorf("FindByID() error = %v, want nil", err)
    }

    if user == nil {
        t.Errorf("FindByID() user = nil, want non-nil")
    }
}

// 文件：user_service.go

package main

type UserService struct {
    Repository UserRepository
}

func (s *UserService) RegisterUser(user *User) error {
    // validate user data
    if user.Name == "" {
        return errors.New("Name is required")
    }

    // save user to repository
    err := s.Repository.Save(user)
    if err != nil {
        return fmt.Errorf("Failed to save user: %w", err)
    }

    return nil
}

// 文件：user_service.go

package main

type UserService struct {
    Repository UserRepository
}

func (s *UserService) ParallelRegister(users []*User) error {
    errCh := make(chan error)

    for _, user := range users {
        go func(u *User) {
            err := s.Repository.Save(u)
            errCh <- err
        }(user)
    }

    for range users {
        if err := <-errCh; err != nil {
            return fmt.Errorf("Failed to save user: %w", err)
        }
    }

    return nil
}