feat: 기관 존재 여부 검증 기능 추가

- 기관 존재 여부를 확인하는 validateCenterExists 메서드 구현
- 존재하지 않는 센터에 대해 BadRequestException 처리 추가
- 테스트 코드 작성및 검증 완

Author: 7zrv

src/main/java/com/somemore/center/repository/CenterRepository.java

@@ -0,0 +1,17 @@
+package com.somemore.center.repository;
+
+import com.somemore.center.domain.Center;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.UUID;
+
+@Repository
+public interface CenterRepository extends JpaRepository<Center, UUID> {
+
+    boolean existsById(UUID id);
+
+    default boolean doesNotExistById(UUID id) {
+        return !existsById(id);
+    }
+}

src/main/java/com/somemore/center/service/query/CenterQueryService.java

@@ -0,0 +1,27 @@
+package com.somemore.center.service.query;
+
+import com.somemore.center.repository.CenterRepository;
+import com.somemore.center.usecase.query.CenterQueryUseCase;
+import com.somemore.global.exception.BadRequestException;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.UUID;
+
+import static com.somemore.global.exception.ExceptionMessage.NOT_EXISTS_CENTER;
+
+@RequiredArgsConstructor
+@Service
+public class CenterQueryService implements CenterQueryUseCase {
+
+    private final CenterRepository centerRepository;
+
+    @Override
+    public void validateCenterExists(UUID id) {
+
+        if (centerRepository.doesNotExistById(id)) {
+            throw new BadRequestException(NOT_EXISTS_CENTER.getMessage());
+        }
+    }
+
+}

src/main/java/com/somemore/center/usecase/query/CenterQueryUseCase.java

@@ -0,0 +1,8 @@
+package com.somemore.center.usecase.query;
+
+import java.util.UUID;
+
+public interface CenterQueryUseCase {
+
+    void validateCenterExists(UUID id);
+}

src/test/java/com/somemore/center/repository/CenterRepositoryTest.java

@@ -0,0 +1,84 @@
+package com.somemore.center.repository;
+
+import com.somemore.IntegrationTestSupport;
+import com.somemore.center.domain.Center;
+import jakarta.transaction.Transactional;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.util.UUID;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@Transactional
+class CenterRepositoryTest extends IntegrationTestSupport {
+
+    @Autowired
+    private CenterRepository centerRepository;
+
+    @DisplayName("기관 id로 기관 프로필을 조회할 수 있다.")
+    @Test
+    void findById() {
+        //given
+        Center center = Center.create(
+                "기본 기관 이름",
+                "010-1234-5678",
+                "http://example.com/image.jpg",
+                "기관 소개 내용",
+                "http://example.com",
+                "account123",
+                "password123"
+        );
+        centerRepository.save(center);
+
+        //when
+        Center foundCenter = centerRepository.findById(center.getId()).orElse(null);
+
+        //then
+        assertThat(foundCenter).isNotNull();
+        assertThat(foundCenter.getName()).isEqualTo("기본 기관 이름");
+        assertThat(foundCenter.getContactNumber()).isEqualTo("010-1234-5678");
+        assertThat(foundCenter.getImgUrl()).isEqualTo("http://example.com/image.jpg");
+        assertThat(foundCenter.getIntroduce()).isEqualTo("기관 소개 내용");
+        assertThat(foundCenter.getHomepageLink()).isEqualTo("http://example.com");
+        assertThat(foundCenter.getAccountId()).isEqualTo("account123");
+        assertThat(foundCenter.getAccountPw()).isEqualTo("password123");
+    }
+
+    @DisplayName("기관 id로 기관이 존재하는지 확인할 수 있다.")
+    @Test
+    void existsById() {
+        //given
+        Center center = Center.create(
+                "기본 기관 이름",
+                "010-1234-5678",
+                "http://example.com/image.jpg",
+                "기관 소개 내용",
+                "http://example.com",
+                "account123",
+                "password123"
+        );
+        centerRepository.save(center);
+
+        //when
+        Boolean isExist = centerRepository.existsById(center.getId());
+
+        //then
+        assertThat(isExist).isTrue();
+    }
+
+    @DisplayName("존재하지 않는 기관 ID로 조회 시 false를 반환한다")
+    @Test
+    void notExistsById() {
+        //given
+        UUID nonExistentId = UUID.randomUUID();
+
+        //when
+        Boolean isExist = centerRepository.existsById(nonExistentId);
+
+        //then
+        assertThat(isExist).isFalse();
+    }
+
+}

src/test/java/com/somemore/center/service/query/CenterQueryServiceTest.java

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+package com.somemore.center.service.query;
+
+import com.somemore.IntegrationTestSupport;
+import com.somemore.center.domain.Center;
+import com.somemore.center.repository.CenterRepository;
+import com.somemore.global.exception.BadRequestException;
+import com.somemore.global.exception.ExceptionMessage;
+import org.assertj.core.api.ThrowableAssert;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.util.UUID;
+
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+
+class CenterQueryServiceTest extends IntegrationTestSupport {
+
+    @Autowired
+    private CenterQueryService centerQueryService;
+
+    @Autowired
+    private CenterRepository centerRepository;
+
+    @DisplayName("존재하지 않는 기관 ID로 조회 시 예외가 발생한다")
+    @Test
+    void validateNonExistentCenter() {
+        // given
+        UUID nonExistentId = UUID.randomUUID();
+
+        // when
+        ThrowableAssert.ThrowingCallable throwingCallable = () ->
+                centerQueryService.validateCenterExists(nonExistentId);
+
+        // then
+        assertThatExceptionOfType(BadRequestException.class)
+                .isThrownBy(throwingCallable)
+                .withMessage(ExceptionMessage.NOT_EXISTS_CENTER.getMessage());
+    }
+
+    @DisplayName("존재하는 기관 ID로 조회 시 예외가 발생하지 않는다")
+    @Test
+    void validateExistingCenter() {
+        // given
+        Center center = Center.create(
+                "기본 기관 이름",
+                "010-1234-5678",
+                "http://example.com/image.jpg",
+                "기관 소개 내용",
+                "http://example.com",
+                "account123",
+                "password123"
+        );
+        Center savedCenter = centerRepository.save(center);
+
+        // when
+        ThrowableAssert.ThrowingCallable callable = () -> centerQueryService.validateCenterExists(savedCenter.getId());
+
+        // then
+        assertThatCode(callable).doesNotThrowAnyException();
+    }
+
+}