Merge pull request #663 from woowacourse-teams/test/645-template-tag-…

…service-layer

TemplateTagServiceTest 추가

backend/src/test/java/codezap/tag/service/TemplateTagServiceTest.java

@@ -0,0 +1,325 @@
+package codezap.tag.service;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.jupiter.api.Assertions.assertAll;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.transaction.annotation.Transactional;
+
+import codezap.category.domain.Category;
+import codezap.fixture.CategoryFixture;
+import codezap.fixture.MemberFixture;
+import codezap.fixture.TemplateFixture;
+import codezap.global.ServiceTest;
+import codezap.global.exception.CodeZapException;
+import codezap.member.domain.Member;
+import codezap.tag.domain.Tag;
+import codezap.tag.dto.response.FindAllTagsResponse;
+import codezap.tag.dto.response.FindTagResponse;
+import codezap.template.domain.Template;
+import codezap.template.domain.TemplateTag;
+
+
+@Transactional
+class TemplateTagServiceTest extends ServiceTest {
+
+    @Autowired
+    private TemplateTagService templateTagService;
+
+    @Nested
+    @DisplayName("템플릿에 대한 태그 생성")
+    class CreateTags {
+
+        @Test
+        @DisplayName("성공: 템플릿에 해당하는 태그 생성")
+        void createTags() {
+            // given
+            Template template = createSavedTemplate();
+            List<String> tagNames = Arrays.asList("tag1", "tag2", "tag3");
+
+            // when
+            templateTagService.createTags(template, tagNames);
+
+            // then
+            List<String> savedTemplateTagNames = getSavedTemplateTagNames(template);
+            assertThat(savedTemplateTagNames).containsExactlyElementsOf(tagNames);
+        }
+
+        @Test
+        @DisplayName("성공: 이미 있는 태그가 포함된 경우 중복 저장하지 않고 새 태그만 생성")
+        void createTags_WhenExistTemplateTagContains() {
+            // given
+            Template template = createSavedTemplate();
+            Tag existTag = tagRepository.save(new Tag("tag1"));
+            TemplateTag existTemplateTag = templateTagRepository.save(new TemplateTag(template, existTag));
+            List<String> tagNames = Arrays.asList(existTag.getName(), "tag2", "tag3");
+
+            // when
+            templateTagService.createTags(template, tagNames);
+
+            // then
+            List<String> savedTemplateTagNames = getSavedTemplateTagNames(template);
+            assertThat(savedTemplateTagNames).hasSize(3)
+                    .containsExactlyElementsOf(tagNames);
+        }
+
+        @Test
+        @DisplayName("성공: 이미 있는 태그이지만 이 템플릿의 태그가 아닌 경우 템플릿 태그만 추가")
+        void createTags_WhenExistTagContains() {
+            // given
+            Template template = createSavedTemplate();
+            Tag existTag = tagRepository.save(new Tag("tag1"));
+            List<String> newTagNames = Arrays.asList("tag2", "tag3");
+            List<String> tagNames = Arrays.asList(existTag.getName(), newTagNames.get(0), newTagNames.get(1));
+            List<String> beforeTemplateTags = getSavedTemplateTagNames(template);
+
+            // when
+            templateTagService.createTags(template, tagNames);
+
+            // then
+            List<String> afterTemplateTags = getSavedTemplateTagNames(template);
+            assertAll(
+                    () -> assertThat(beforeTemplateTags).doesNotContainAnyElementsOf(newTagNames),
+                    () -> assertThat(afterTemplateTags).containsExactlyElementsOf(tagNames)
+            );
+        }
+
+        private List<String> getSavedTemplateTagNames(Template template) {
+            return templateTagRepository.findAllByTemplate(template).stream()
+                    .map(templateTag -> templateTag.getTag().getName())
+                    .toList();
+        }
+    }
+
+    @Nested
+    @DisplayName("템플릿으로 태그 조회")
+    class GetByTemplate {
+
+        @Test
+        @DisplayName("성공: 템플릿에 해당하는 태그 목록 반환")
+        void getByTemplate() {
+            // given
+            Template template = createSavedTemplate();
+            Tag tag1 = tagRepository.save(new Tag("tag1"));
+            Tag tag2 = tagRepository.save(new Tag("tag2"));
+            TemplateTag templateTag1 = templateTagRepository.save(new TemplateTag(template, tag1));
+            TemplateTag templateTag2 = templateTagRepository.save(new TemplateTag(template, tag2));
+
+            // when & then
+            assertThat(templateTagService.getByTemplate(template))
+                    .containsExactly(templateTag1.getTag(), templateTag2.getTag());
+        }
+
+        @Test
+        @DisplayName("성공: 템플릿에 해당하는 태그가 없는 경우 빈 목록 반환")
+        void getByTemplate_WhenNotExistTemplateTag() {
+            // given
+            Template template = createSavedTemplate();
+            tagRepository.save(new Tag("tag1"));
+            tagRepository.save(new Tag("tag2"));
+
+            // when & then
+            assertThat(templateTagService.getByTemplate(template)).isEmpty();
+        }
+
+        @Test
+        @Disabled("현재 InvalidDataAccessApiUsageException 발생하므로 조회 직전에 검증 처리가 필요")
+        @DisplayName("실패: 존재하지 않는 템플릿으로 태그 조회")
+        void getByTemplate_WhenNotExistTemplate() {
+            // given
+            Member member = memberRepository.save(MemberFixture.getFirstMember());
+            Category category = categoryRepository.save(CategoryFixture.getFirstCategory());
+            Template unSavedTemplate = TemplateFixture.get(member, category);
+            tagRepository.save(new Tag("tag1"));
+            tagRepository.save(new Tag("tag2"));
+
+            // when & then
+            assertThatThrownBy(() -> templateTagService.getByTemplate(unSavedTemplate))
+                    .isInstanceOf(CodeZapException.class)
+                    .hasMessage("템플릿이 존재하지 않아 태그를 조회할 수 없습니다.");
+        }
+    }
+
+    @Nested
+    @DisplayName("여러 템플릿으로 모든 태그 조회")
+    class FindAllByTemplates {
+
+        @Test
+        @DisplayName("성공: 템플릿 목록에 해당하는 모든 태그 반환")
+        void findAllByTemplates() {
+            // given
+            Tag tag1 = tagRepository.save(new Tag("tag1"));
+            Tag tag2 = tagRepository.save(new Tag("tag2"));
+
+            Template template1 = createSavedTemplate();
+            templateTagRepository.save(new TemplateTag(template1, tag1));
+
+            Template template2 = createSecondTemplate();
+            templateTagRepository.save(new TemplateTag(template2, tag2));
+
+            // when & then
+            FindAllTagsResponse actual = templateTagService.findAllByTemplates(List.of(template1, template2));
+            assertThat(actual).isEqualTo(new FindAllTagsResponse(
+                    List.of(FindTagResponse.from(tag1), FindTagResponse.from(tag2)))
+            );
+        }
+
+        @Test
+        @DisplayName("성공: 템플릿들이 중복된 태그를 가지는 경우 중복 제거 후 반환")
+        void findAllByTemplates_WhenDuplicatedTags() {
+            // given
+            Tag tag1 = tagRepository.save(new Tag("tag1"));
+            Tag tag2 = tagRepository.save(new Tag("tag2"));
+
+            Template template1 = createSavedTemplate();
+            templateTagRepository.save(new TemplateTag(template1, tag1));
+            templateTagRepository.save(new TemplateTag(template1, tag2));
+
+            Template template2 = createSecondTemplate();
+            templateTagRepository.save(new TemplateTag(template2, tag2));
+
+            // when & then
+            FindAllTagsResponse actual = templateTagService.findAllByTemplates(List.of(template1, template2));
+            assertThat(actual).isEqualTo(new FindAllTagsResponse(
+                    List.of(FindTagResponse.from(tag1), FindTagResponse.from(tag2)))
+            );
+        }
+
+        @Test
+        @DisplayName("성공: 해당하는 태그가 없는 경우 빈 목록 반환")
+        void findAllByTemplates_WhenNotExist() {
+            // given
+            Template template1 = createSavedTemplate();
+
+            // when & then
+            FindAllTagsResponse actual = templateTagService.findAllByTemplates(List.of(template1));
+            assertThat(actual).isEqualTo(new FindAllTagsResponse(Collections.EMPTY_LIST));
+        }
+    }
+
+    @Nested
+    @DisplayName("태그 업데이트")
+    class UpdateTags {
+
+        @Test
+        @DisplayName("성공: 새 태그 생성")
+        void updateTags() {
+            // given
+            String tagName = "tag1";
+            Template template = createSavedTemplate();
+            List<String> newTags = List.of(tagName);
+
+            // when
+            templateTagService.updateTags(template, newTags);
+
+            // then
+            List<String> saveTemplateTags = templateTagRepository.findAllByTemplate(template).stream()
+                    .map(templateTag -> templateTag.getTag().getName())
+                    .toList();
+            assertAll(
+                    () -> assertThat(tagRepository.findByName(tagName)).isPresent(),
+                    () -> assertThat(saveTemplateTags).containsExactlyElementsOf(newTags)
+            );
+        }
+
+        @Test
+        @DisplayName("성공: 기존 태그 전체 삭제로 태그 업데이트 가능")
+        void updateTags_WhenRemoveAllTags() {
+            // given
+            Template template = createSavedTemplate();
+            List<Tag> tags = tagRepository.saveAll(List.of(new Tag("tag1"), new Tag("tag2")));
+            templateTagRepository.saveAll(
+                    List.of(new TemplateTag(template, tags.get(0)), new TemplateTag(template, tags.get(1))));
+
+            List<String> updatedTags = List.of();
+
+            // when
+            templateTagService.updateTags(template, updatedTags);
+
+            // then
+            assertThat(templateTagRepository.findAllByTemplate(template)).isEmpty();
+        }
+
+        @Test
+        @DisplayName("성공: 동일한 태그가 이미 있는 경우 중복 저장하지 않음")
+        void updateTags_Success() {
+            // given
+            Template template = createSavedTemplate();
+            Tag tag1 = tagRepository.save(new Tag("tag1"));
+            templateTagRepository.save(new TemplateTag(template, tag1));
+
+            List<String> newTags = List.of(tag1.getName(), "tag2");
+
+            // when
+            templateTagService.updateTags(template, newTags);
+
+            // then
+            List<String> saveTemplateTags = templateTagRepository.findAllByTemplate(template).stream()
+                    .map(templateTag -> templateTag.getTag().getName())
+                    .toList();
+            assertThat(saveTemplateTags).hasSize(2)
+                    .containsExactlyElementsOf(newTags);
+        }
+    }
+
+    @Nested
+    @DisplayName("템플릿에 해당하는 태그 전체 삭제")
+    class DeleteByIds {
+
+        @Test
+        @DisplayName("성공")
+        void deleteByIds() {
+            // given
+            Template template = createSavedTemplate();
+            Tag tag1 = tagRepository.save(new Tag("tag1"));
+            Tag tag2 = tagRepository.save(new Tag("tag2"));
+            templateTagRepository.save(new TemplateTag(template, tag1));
+            templateTagRepository.save(new TemplateTag(template, tag2));
+
+            // when
+            templateTagService.deleteByIds(List.of(template.getId()));
+
+            // then
+            assertAll(
+                    () -> assertThat(templateTagRepository.findAllByTemplate(template)).isEmpty(),
+                    () -> assertThat(tagRepository.findByName(tag1.getName())).isPresent(),
+                    () -> assertThat(tagRepository.findByName(tag2.getName())).isPresent()
+            );
+        }
+
+        @Test
+        @DisplayName("성공: 템플릿에 해당하는 태그가 없는 경우")
+        void deleteByIds_WhenNotExistTemplateTag() {
+            // given
+            Template template = createSavedTemplate();
+
+            // when
+            templateTagService.deleteByIds(List.of(template.getId()));
+
+            // then
+            assertThat(templateTagRepository.findAllByTemplate(template)).isEmpty();
+        }
+    }
+
+    private Template createSavedTemplate() {
+        Member member = memberRepository.save(MemberFixture.getFirstMember());
+        Category category = categoryRepository.save(CategoryFixture.getFirstCategory());
+        return templateRepository.save(TemplateFixture.get(member, category));
+    }
+
+    private Template createSecondTemplate() {
+        Member member = memberRepository.save(MemberFixture.getSecondMember());
+        Category category = categoryRepository.save(CategoryFixture.getSecondCategory());
+        return templateRepository.save(TemplateFixture.get(member, category));
+    }
+}
+