fix: Apple 로그인 identityToken 요청 호환 처리

src/main/java/com/moru/server/domain/member/controller/AuthController.java

@@ -39,7 +39,7 @@ public class AuthController {
             - Authorization 헤더 없이 호출합니다.
             - kakao: token에 카카오 accessToken을 전달합니다.
             - google: token에 Google idToken을 전달합니다.
-            - apple: token에 Apple identityToken을 전달합니다.
+            - apple: identityToken에 Apple identityToken을 전달합니다. token도 호환됩니다.
             """;
     private static final String KAKAO_REQUEST_EXAMPLE = """
             {
@@ -55,7 +55,7 @@ public class AuthController {
             """;
     private static final String APPLE_REQUEST_EXAMPLE = """
             {
-              "token": "apple_identity_token",
+              "identityToken": "apple_identity_token",
               "authorizationCode": "apple_authorization_code"
             }
             """;

src/main/java/com/moru/server/domain/member/dto/AuthRequestDTO.java

@@ -1,5 +1,6 @@
 package com.moru.server.domain.member.dto;
 
+import com.fasterxml.jackson.annotation.JsonAlias;
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.constraints.NotBlank;
 
@@ -8,7 +9,8 @@ public record AuthRequestDTO() {
     @Schema(description = "소셜 로그인 요청")
     public record SocialLoginRequest(
             @NotBlank(message = "소셜 토큰은 필수입니다.")
-            @Schema(description = "소셜 플랫폼에서 발급받은 토큰. kakao는 accessToken, google은 idToken, apple은 identityToken을 전달합니다.", example = "kakao_access_token")
+            @JsonAlias("identityToken")
+            @Schema(description = "소셜 플랫폼에서 발급받은 토큰. kakao는 accessToken, google은 idToken, apple은 token 또는 identityToken을 전달합니다.", example = "kakao_access_token")
             String token,
 
             @Schema(description = "Apple 로그인 필수 인가 코드. kakao/google은 null로 전달합니다.", example = "apple_authorization_code")

src/test/java/com/moru/server/domain/member/controller/AuthControllerTest.java

@@ -0,0 +1,103 @@
+package com.moru.server.domain.member.controller;
+
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoInteractions;
+import static org.mockito.Mockito.when;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.webmvc.test.autoconfigure.AutoConfigureMockMvc;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.bean.override.mockito.MockitoBean;
+import org.springframework.test.web.servlet.MockMvc;
+
+import com.moru.server.domain.member.dto.AuthRequestDTO;
+import com.moru.server.domain.member.dto.AuthResponseDTO;
+import com.moru.server.domain.member.entity.enums.OAuthProvider;
+import com.moru.server.domain.member.service.command.auth.AuthCommandService;
+
+@ActiveProfiles("test")
+@SpringBootTest
+@AutoConfigureMockMvc
+class AuthControllerTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    @MockitoBean
+    private AuthCommandService authCommandService;
+
+    @Test
+    void acceptsIdentityTokenForAppleLogin() throws Exception {
+        AuthRequestDTO.SocialLoginRequest request =
+                new AuthRequestDTO.SocialLoginRequest("apple-identity-token", "apple-authorization-code");
+        when(authCommandService.loginWithSocial(OAuthProvider.APPLE, request))
+                .thenReturn(socialLoginResponse());
+
+        mockMvc.perform(post("/auth/login/apple")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("""
+                                {
+                                  "identityToken": "apple-identity-token",
+                                  "authorizationCode": "apple-authorization-code"
+                                }
+                                """))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.isSuccess").value(true))
+                .andExpect(jsonPath("$.result.memberId").value(1));
+
+        verify(authCommandService).loginWithSocial(OAuthProvider.APPLE, request);
+    }
+
+    @Test
+    void keepsSupportingTokenForAppleLogin() throws Exception {
+        AuthRequestDTO.SocialLoginRequest request =
+                new AuthRequestDTO.SocialLoginRequest("apple-identity-token", "apple-authorization-code");
+        when(authCommandService.loginWithSocial(OAuthProvider.APPLE, request))
+                .thenReturn(socialLoginResponse());
+
+        mockMvc.perform(post("/auth/login/apple")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("""
+                                {
+                                  "token": "apple-identity-token",
+                                  "authorizationCode": "apple-authorization-code"
+                                }
+                                """))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.isSuccess").value(true));
+
+        verify(authCommandService).loginWithSocial(OAuthProvider.APPLE, request);
+    }
+
+    @Test
+    void rejectsAppleLoginWithoutSocialToken() throws Exception {
+        mockMvc.perform(post("/auth/login/apple")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content("""
+                                {
+                                  "authorizationCode": "apple-authorization-code"
+                                }
+                                """))
+                .andExpect(status().isBadRequest())
+                .andExpect(jsonPath("$.isSuccess").value(false))
+                .andExpect(jsonPath("$.code").value("COMMON400"));
+
+        verifyNoInteractions(authCommandService);
+    }
+
+    private AuthResponseDTO.SocialLoginResponse socialLoginResponse() {
+        return AuthResponseDTO.SocialLoginResponse.builder()
+                .memberId(1L)
+                .accessToken("access-token")
+                .refreshToken("refresh-token")
+                .isNewMember(true)
+                .onboardingCompleted(false)
+                .build();
+    }
+}