fix : 멤버 엔티티 수정 - 이메일 nullable false 삭제

- OauthServiceTest 추가

Author: essaysir

src/main/java/umc/th/juinjang/domain/member/model/Member.java

@@ -43,7 +43,6 @@ public class Member extends BaseEntity implements UserDetails {
 	@GeneratedValue(strategy = GenerationType.IDENTITY)
 	private Long memberId;
 
-	@Column(nullable = false)
 	private String email;
 
 	private String nickname;

src/test/java/umc/th/juinjang/api/auth/service/OauthServiceTest.java

@@ -0,0 +1,63 @@
+package umc.th.juinjang.api.auth.service;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.mockito.ArgumentMatchers.*;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.mockito.BDDMockito;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+import umc.th.juinjang.api.IntegrationTestSupport;
+import umc.th.juinjang.domain.member.model.Member;
+import umc.th.juinjang.domain.member.model.MemberStatus;
+import umc.th.juinjang.domain.member.repository.MemberRepository;
+import umc.th.juinjang.external.openfeign.kakao.KakaoUnlinkClient;
+
+public class OauthServiceTest extends IntegrationTestSupport {
+
+	@MockBean
+	private KakaoUnlinkClient kakaoUnlinkClient;
+
+	@Autowired
+	private MemberRepository memberRepository;
+
+	@Autowired
+	private OAuthServiceV2 oauthService;
+
+	@Test
+	@DisplayName("카카오 탈퇴 성공 - 카카오 연결 끊기 성공 시 회원 상태가 WITHDRAWN으로 변경")
+	void kakaoWithdraw_Success() {
+		// given
+		Long testTargetId = 123456789L;
+
+		Member testMember = Member.createKakaoMember(
+			"test@example.com",
+			testTargetId,
+			"테스트유저",
+			"1.0"
+		);
+		memberRepository.save(testMember);
+
+		ResponseEntity<String> successResponse = new ResponseEntity<>("success", HttpStatus.OK);
+
+		BDDMockito.when(
+			kakaoUnlinkClient.unlinkUser(any(), any(), any())
+		).thenReturn(successResponse);
+
+		// when
+		boolean result = oauthService.kakaoWithdraw(testMember, testTargetId);
+
+		// then
+		Member updatedMember = memberRepository.findById(testMember.getMemberId()).orElseThrow();
+		assertThat(updatedMember)
+			.extracting(Member::getMemberId, Member::getStatus, Member::getKakaoTargetId, Member::getNickname,
+				Member::getDeletedAt)
+			.containsExactly(testMember.getMemberId(), MemberStatus.WITHDRAWN, null, null,
+				updatedMember.getDeletedAt());
+	}
+
+}