fix(chat): 비로그인 채팅 리스트 응답을 보정한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/chat/controller/ChatRoomListController.kt

@@ -1,8 +1,8 @@
 package kr.co.vividnext.sodalive.v2.chat.controller
 
 import kr.co.vividnext.sodalive.common.ApiResponse
-import kr.co.vividnext.sodalive.common.SodaException
 import kr.co.vividnext.sodalive.member.Member
+import kr.co.vividnext.sodalive.v2.chat.dto.ChatRoomListPageResponse
 import kr.co.vividnext.sodalive.v2.chat.service.ChatRoomListService
 import org.springframework.security.core.annotation.AuthenticationPrincipal
 import org.springframework.web.bind.annotation.GetMapping
@@ -22,7 +22,7 @@ class ChatRoomListController(
         @RequestParam(required = false) cursor: String?,
         @RequestParam(defaultValue = "30") limit: Int
     ) = run {
-        if (member == null) throw SodaException(messageKey = "common.error.bad_credentials")
+        if (member == null) return@run ApiResponse.ok(ChatRoomListPageResponse(emptyList(), false, null))
         ApiResponse.ok(service.getRooms(member, filter, cursor, limit))
     }
 }

src/test/kotlin/kr/co/vividnext/sodalive/v2/chat/ChatRoomListControllerTest.kt

@@ -0,0 +1,56 @@
+package kr.co.vividnext.sodalive.v2.chat
+
+import kr.co.vividnext.sodalive.member.Member
+import kr.co.vividnext.sodalive.v2.chat.controller.ChatRoomListController
+import kr.co.vividnext.sodalive.v2.chat.dto.ChatRoomListItemResponse
+import kr.co.vividnext.sodalive.v2.chat.dto.ChatRoomListPageResponse
+import kr.co.vividnext.sodalive.v2.chat.service.ChatRoomListService
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertFalse
+import org.junit.jupiter.api.Assertions.assertNull
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+import org.mockito.Mockito
+
+class ChatRoomListControllerTest {
+    private lateinit var service: ChatRoomListService
+    private lateinit var controller: ChatRoomListController
+
+    @BeforeEach
+    fun setUp() {
+        service = Mockito.mock(ChatRoomListService::class.java)
+        controller = ChatRoomListController(service)
+    }
+
+    @Test
+    @DisplayName("채팅 리스트 조회는 비로그인 사용자에게 빈 목록을 반환한다")
+    fun shouldReturnEmptyRoomsForAnonymousUser() {
+        val response = controller.getRooms(member = null, filter = "ALL", cursor = null, limit = 30)
+
+        assertTrue(response.success)
+        assertEquals(emptyList<ChatRoomListItemResponse>(), response.data?.rooms)
+        assertFalse(response.data?.hasMore ?: true)
+        assertNull(response.data?.nextCursor)
+        Mockito.verifyNoInteractions(service)
+    }
+
+    @Test
+    @DisplayName("채팅 리스트 조회는 로그인 사용자의 요청을 서비스에 위임한다")
+    fun shouldDelegateAuthenticatedRequestToService() {
+        val member = Member(password = "pw", nickname = "user").apply { id = 1L }
+        val serviceResponse = ChatRoomListPageResponse(
+            rooms = emptyList(),
+            hasMore = false,
+            nextCursor = null
+        )
+        Mockito.`when`(service.getRooms(member, "DM", "cursor", 10)).thenReturn(serviceResponse)
+
+        val response = controller.getRooms(member = member, filter = "DM", cursor = "cursor", limit = 10)
+
+        assertTrue(response.success)
+        assertEquals(serviceResponse, response.data)
+        Mockito.verify(service).getRooms(member, "DM", "cursor", 10)
+    }
+}