fix(chat-banner): 관리자 배너 목록에 언어 표기를 추가한다

src/test/kotlin/kr/co/vividnext/sodalive/admin/chat/AdminChatBannerControllerTest.kt

@@ -14,6 +14,8 @@ import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Assertions.assertTrue
 import org.junit.jupiter.api.Test
 import org.mockito.Mockito
+import org.springframework.data.domain.PageImpl
+import org.springframework.data.domain.PageRequest
 import org.springframework.mock.web.MockMultipartFile
 import java.net.URL
 
@@ -107,6 +109,21 @@ class AdminChatBannerControllerTest {
         Mockito.verify(bannerService).registerBanner(2L, "", null)
     }
 
+    @Test
+    fun shouldAppendBannerLanguageToCharacterNameInBannerList() {
+        val pageable = PageRequest.of(0, 20)
+        val japaneseBanner = createBanner(id = 12L, lang = Lang.JA, imagePath = "banner/jp.png")
+
+        Mockito.`when`(adminCharacterService.createDefaultPageRequest(0, 20)).thenReturn(pageable)
+        Mockito.`when`(bannerService.getActiveBanners(pageable))
+            .thenReturn(PageImpl(listOf(japaneseBanner), pageable, 1))
+
+        val response = controller.getBannerList(page = 0, size = 20)
+
+        assertTrue(response.success)
+        assertEquals("character-12 (일본어)", response.data?.content?.first()?.characterName)
+    }
+
     private fun createBanner(id: Long, lang: Lang, imagePath: String): ChatCharacterBanner {
         val character = ChatCharacter(
             characterUUID = "character-$id",