test: 팔로우 테스트(서비스 - DB) 구현

Author: sapiens2000

src/test/java/com/example/log4u/domain/follow/FollowTest.java

@@ -0,0 +1,105 @@
+package com.example.log4u.domain.follow;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import com.example.log4u.domain.follow.entitiy.Follow;
+import com.example.log4u.domain.follow.exception.FollowNotFoundException;
+import com.example.log4u.domain.follow.repository.FollowRepository;
+import com.example.log4u.domain.follow.service.FollowService;
+import com.example.log4u.domain.user.entity.User;
+import com.example.log4u.domain.user.exception.UserNotFoundException;
+import com.example.log4u.domain.user.repository.UserRepository;
+import com.example.log4u.fixture.UserFixture;
+
+import jakarta.transaction.Transactional;
+
+@DisplayName("팔로우 통합 테스트(시큐리티 제외)")
+@SpringBootTest
+class FollowTest {
+
+	@Autowired
+	private FollowService followService;
+
+	@Autowired
+	private FollowRepository followRepository;
+
+	@Autowired
+	private UserRepository userRepository;
+
+	private static final String WRONG_TARGET = "nonexistuser";
+	private static final String TARGET = "targetUser";
+
+	@Test
+	@Transactional
+	@DisplayName("팔로우 시 유저가 없어 USER NOT FOUND 예외 발생")
+	void createFollowFailureWithUserNotFound() {
+		User user = UserFixture.createUserFixture();
+		userRepository.save(user);
+
+		assertThrows(UserNotFoundException.class,
+			() -> followService.createFollow(user.getUserId(), WRONG_TARGET));
+	}
+
+	@Test
+	@Transactional
+	@DisplayName("팔로우가 되어야 한다.")
+	void createFollowSuccess() {
+		String targetUserNickname = "targetUser";
+		User initiator = UserFixture.createUserFixture();
+		User target = UserFixture.createUserFixtureWithNickname(targetUserNickname);
+
+		initiator = userRepository.save(initiator);
+		target = userRepository.save(target);
+
+		followService.createFollow(initiator.getUserId(), targetUserNickname);
+
+		followRepository.existsByInitiatorIdAndTargetId(initiator.getUserId(), target.getUserId());
+	}
+
+	@Test
+	@Transactional
+	@DisplayName("팔로우 취소가 되어야한다.")
+	void deleteFollowSuccess() {
+		Long userId = saveOneFollow();
+
+		followService.deleteFollow(userId, TARGET);
+		
+		assertThrows(FollowNotFoundException.class,
+			() -> followService.deleteFollow(userId, TARGET));
+	}
+
+	@Test
+	@Transactional
+	@DisplayName("팔로우한 정보가 없어 FollowNotFound 발생")
+	void deleteFollowFailureWithFollowNotFound() {
+		User user = UserFixture.createUserFixture();
+		user = userRepository.save(user);
+		final Long userId = user.getUserId();
+
+		assertThrows(FollowNotFoundException.class,
+			() -> followService.deleteFollow(userId, WRONG_TARGET));
+	}
+
+	private Long saveOneFollow() {
+		String targetUserNickname = "targetUser";
+		User initiator = UserFixture.createUserFixture();
+		User target = UserFixture.createUserFixtureWithNickname(targetUserNickname);
+
+		initiator = userRepository.save(initiator);
+		target = userRepository.save(target);
+
+		Follow follow = Follow.of(
+			initiator.getUserId(),
+			target.getUserId()
+		);
+
+		followRepository.save(follow);
+
+		return initiator.getUserId();
+	}
+}