test: HobbyService 테스트 작성

- HobbyService 테스트 작성
- HobbyFakeRepository 작성
- HobbyService 메서드 이름 수정

src/main/java/com/atwoz/member/application/info/hobby/HobbyService.java

@@ -17,7 +17,7 @@ public class HobbyService {
 
     @Transactional
     public void saveMemberHobbies(final Long memberId, final List<String> hobbyNames) {
-        deleteBeforeMemberHobbies(memberId);
+        deleteMemberHobbies(memberId);
         List<Hobby> memberHobbies = HobbyName.findAllByNames(hobbyNames)
                 .stream()
                 .map(hobbyName -> new Hobby(memberId, hobbyName))
@@ -27,7 +27,7 @@ public void saveMemberHobbies(final Long memberId, final List<String> hobbyNames
     }
 
     @Transactional
-    public void deleteBeforeMemberHobbies(final Long memberId) {
+    public void deleteMemberHobbies(final Long memberId) {
         hobbyRepository.deleteHobbiesByMemberId(memberId);
     }
 

src/test/java/com/atwoz/member/application/info/HobbyServiceTest.java

@@ -0,0 +1,72 @@
+package com.atwoz.member.application.info;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import com.atwoz.member.application.info.hobby.HobbyService;
+import com.atwoz.member.domain.info.hobby.Hobby;
+import com.atwoz.member.domain.info.hobby.HobbyRepository;
+import com.atwoz.member.infrastructure.info.HobbyFakeRepository;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayNameGeneration;
+import org.junit.jupiter.api.DisplayNameGenerator;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+import java.util.List;
+
+@DisplayNameGeneration(DisplayNameGenerator.ReplaceUnderscores.class)
+@SuppressWarnings("NonAsciiCharacters")
+@ExtendWith(MockitoExtension.class)
+public class HobbyServiceTest {
+
+    private HobbyService hobbyService;
+    private HobbyRepository hobbyRepository;
+
+    @BeforeEach
+    void init() {
+        hobbyRepository = new HobbyFakeRepository();
+        hobbyService = new HobbyService(hobbyRepository);
+    }
+
+    @Test
+    void 회원의_모든_취미를_저장한다() {
+        // given
+        Long memberId = 1L;
+        List<String> hobbyNames = List.of("자전거", "애니메이션");
+
+        // when
+        hobbyService.saveMemberHobbies(memberId, hobbyNames);
+
+        // then
+        List<Hobby> saveHobbies = hobbyRepository.findAllByMemberId(memberId);
+        assertThat(saveHobbies.size()).isEqualTo(2);
+    }
+
+    @Test
+    void 회원의_모든_취미를_삭제한다() {
+        // given
+        Long memberId = 1L;
+        List<String> hobbyNames = List.of("자전거", "애니메이션");
+        hobbyService.saveMemberHobbies(memberId, hobbyNames);
+
+        // when
+        hobbyService.deleteMemberHobbies(memberId);
+
+        // then
+        assertThat(hobbyRepository.findAllByMemberId(memberId)).isEmpty();
+    }
+
+    @Test
+    void 회원의_모든_취미를_조회한다() {
+        // given
+        Long memberId = 1L;
+        List<String> hobbyNames = List.of("자전거", "애니메이션");
+        hobbyService.saveMemberHobbies(memberId, hobbyNames);
+
+        // when
+        List<Hobby> memberHobbies = hobbyService.findMemberHobbies(memberId);
+
+        // then
+        assertThat(memberHobbies.size()).isEqualTo(2);
+    }
+}

src/test/java/com/atwoz/member/infrastructure/info/HobbyFakeRepository.java

@@ -0,0 +1,40 @@
+package com.atwoz.member.infrastructure.info;
+
+import com.atwoz.member.domain.info.hobby.Hobby;
+import com.atwoz.member.domain.info.hobby.HobbyRepository;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class HobbyFakeRepository implements HobbyRepository {
+
+    private final Map<Long, Hobby> map = new HashMap<>();
+    private long id = 1L;
+
+    @Override
+    public void save(final Hobby hobby) {
+        Hobby newHobby = new Hobby(hobby.getMemberId(), hobby.getHobbyName());
+        map.put(id, newHobby);
+        id++;
+    }
+
+    @Override
+    public void saveAll(final List<Hobby> memberHobbies) {
+        memberHobbies.stream()
+                .map(hobby -> new Hobby(hobby.getMemberId(), hobby.getHobbyName()))
+                .forEach(hobby -> map.put(id++, hobby));
+    }
+
+    @Override
+    public void deleteHobbiesByMemberId(final Long memberId) {
+        map.values().removeIf(hobby -> memberId.equals(hobby.getMemberId()));
+    }
+
+    @Override
+    public List<Hobby> findAllByMemberId(final Long memberId) {
+        return map.values()
+                .stream()
+                .filter(hobby -> memberId.equals(hobby.getMemberId()))
+                .toList();
+    }
+}