Feat(#20): AuthMemberService 테스트 작성

src/test/java/shop/kkeujeok/kkeujeokbackend/auth/api/AuthControllerTest.java

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+package shop.kkeujeok.kkeujeokbackend.auth.api;
+
+public class AuthControllerTest {
+}

src/test/java/shop/kkeujeok/kkeujeokbackend/auth/application/AuthMemberServiceTest.java

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+package shop.kkeujeok.kkeujeokbackend.auth.application;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import shop.kkeujeok.kkeujeokbackend.auth.api.dto.response.MemberLoginResDto;
+import shop.kkeujeok.kkeujeokbackend.auth.api.dto.response.UserInfo;
+import shop.kkeujeok.kkeujeokbackend.global.entity.Status;
+import shop.kkeujeok.kkeujeokbackend.member.domain.Member;
+import shop.kkeujeok.kkeujeokbackend.member.domain.Role;
+import shop.kkeujeok.kkeujeokbackend.member.domain.SocialType;
+import shop.kkeujeok.kkeujeokbackend.member.domain.repository.MemberRepository;
+
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.*;
+
+@ExtendWith(MockitoExtension.class)
+class AuthMemberServiceTest {
+
+    @Mock
+    private MemberRepository memberRepository;
+
+    @InjectMocks
+    private AuthMemberService authMemberService;
+
+    private UserInfo userInfo;
+    private SocialType provider;
+    private Member member;
+
+    @BeforeEach
+    void setUp() {
+        userInfo = new UserInfo("이메일", "이름", "사진", "닉네임");
+        provider = SocialType.GOOGLE;
+        member = Member.builder()
+                .status(Status.A)
+                .email(userInfo.email())
+                .name(userInfo.name())
+                .picture(userInfo.picture())
+                .socialType(provider)
+                .role(Role.ROLE_USER)
+                .firstLogin(true)
+                .nickname(userInfo.nickname())
+                .build();
+    }
+
+    @DisplayName("신규 회원을 저장합니다.")
+    @Test
+    void 신규_회원을_저장합니다() {
+        when(memberRepository.findByEmail(anyString())).thenReturn(Optional.empty());
+        when(memberRepository.save(any(Member.class))).thenReturn(member);
+
+        MemberLoginResDto result = authMemberService.saveUserInfo(userInfo, provider);
+
+        assertThat(result).isNotNull();
+        verify(memberRepository).findByEmail(userInfo.email());
+        verify(memberRepository).save(any(Member.class));
+    }
+
+    @DisplayName("소셜 타입이 일치하지 않는 경우 예외를 던집니다.")
+    @Test
+    void 소셜_타입이_일치하지_않는_경우_예외를_던집니다() {
+        when(memberRepository.findByEmail(anyString())).thenReturn(Optional.of(member));
+        SocialType invalidProvider = SocialType.KAKAO;
+
+        assertThrows(RuntimeException.class, () -> authMemberService.saveUserInfo(userInfo, invalidProvider));
+
+        verify(memberRepository).findByEmail(userInfo.email());
+    }
+
+    @Test
+    @DisplayName("이메일이 null인 경우 테스트")
+    void testNullEmail() {
+        UserInfo invalidUserInfo = new UserInfo(null, "Test User", "testUser", "testPicture");
+
+        assertThrows(RuntimeException.class, () -> authMemberService.saveUserInfo(invalidUserInfo, provider));
+    }
+}

src/test/java/shop/kkeujeok/kkeujeokbackend/global/oauth/KakaoAuthServiceTest.java

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+package shop.kkeujeok.kkeujeokbackend.global.oauth;
+
+public class KakaoAuthServiceTest {
+}