패스트캠퍼스 환급챌린지 11일차 : 9개 도메인 프로젝트로 끝내는 백엔드 웹 개발 (Java/Spring) 초격차 패키지 Online 강의 후기]

본 포스팅은 패스트캠퍼스 환급 챌린지 참여를 위해 작성하였습니다.

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User.java

package org.fastcampus.user.domain;

import java.util.Objects;
import org.fastcampus.common.domain.*;

public class User {
    private final Long id;
    private final UserInfo info;
    private final PositiveIntegerCounter followingCount;
    private final PositiveIntegerCounter followerCount;

    public User(Long id, UserInfo userInfo) {
        if (userInfo == null) {
            throw new IllegalArgumentException();
        }

        this.id = id;
        this.info = userInfo;
        this.followingCount = new PositiveIntegerCounter();
        this.followerCount = new PositiveIntegerCounter();
    }

    public void follow(User targetUser) {
        if (targetUser.equals(this)) {
            throw new IllegalArgumentException();
        }

        followingCount.increase();
        targetUser.increaseFollowerCount();
    }

    public void unfollow(User targetUser) {
        if (targetUser.equals(this)) {
            throw new IllegalArgumentException();
        }

        followingCount.decrease();
        targetUser.decreaseFollowerCount();
    }

    private void increaseFollowerCount() {
        followerCount.increase();
    }

    private void decreaseFollowerCount() {
        followerCount.decrease();
    }

    @Override
    public boolean equals(Object o) {
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        User user = (User) o;
        return Objects.equals(id, user.id);
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(id);
    }

    public Long getId() {
        return id;
    }

    public UserInfo getInfo() {
        return info;
    }

    public int followerCount() {
        return followerCount.getCount();
    }

    public int followingCount() {
        return followingCount.getCount();
    }
}

UserInfo.java

package org.fastcampus.user.domain;

public class UserInfo {
    private final String name;
    private final String profileImageUrl;

    public UserInfo(String name, String profileImageUrl) {

        if (name == null || name.isEmpty()) {
            throw new IllegalArgumentException();
        }

        this.name = name;
        this.profileImageUrl = profileImageUrl;
    }

    public String getName() {
        return name;
    }
}

FakeUserRepository.java

package org.fastcampus.user.application.repository;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import org.fastcampus.user.application.Interfaces.*;
import org.fastcampus.user.domain.*;

public class FakeUserRepository implements UserRepository {
    private final Map<Long, User> store = new HashMap<>();

    @Override
    public User save(User user) {
        if (user.getId() != null) {
            store.put(user.getId(), user);
        }
        Long id = store.size() + 1L;
        User newUser = new User(id, user.getInfo());
        store.put(id, newUser);
        return newUser;
    }

    @Override
    public Optional<User> findById(Long id) {
        return Optional.ofNullable(store.get(id));
    }
}

UserServiceTest.java

package org.fastcampus.user.application;

import org.fastcampus.user.application.Interfaces.*;
import org.fastcampus.user.application.dto.*;
import org.fastcampus.user.application.repository.*;
import org.fastcampus.user.domain.*;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.*;

class UserServiceTest {
    private final UserRepository userRepository = new FakeUserRepository();
    private final UserService userService = new UserService(userRepository);

    @Test
    void givenUserInfoDto_whenCreateUser_thenCanFindUser() {
        //  given
        CreateUserRequestDto dto = new CreateUserRequestDto("test", "");

        //  when
        User savedUser = userService.createUser(dto);

        //  then
        User foundUser = userService.getUser(savedUser.getId());
        UserInfo userInfo = foundUser.getInfo();
        assertEquals(foundUser.getId(), savedUser.getId());
        assertEquals("test", userInfo.getName());
    }
}

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