fix : 채팅방 메세지에 USERNAME 속성 추가

Author: JeongA-Shin

src/main/java/oncoding/concoder/dto/ChatDTO.java

@@ -64,6 +64,7 @@ public static class MessageRequest {
     public static class MessageResponse {
 
       private UUID userId;
+      private String username;
       private String content;
     }
 

src/main/java/oncoding/concoder/service/ChattingService.java

@@ -40,7 +40,7 @@ public class ChattingService {
    */
   public MessageResponse sendMessage(final MessageRequest request) {
     User user = userRepository.findById(request.getUserId()).orElseThrow(IllegalArgumentException::new);
-    return new MessageResponse(user.getId(), request.getContent()); //보낼 메세지 객체를 리턴
+    return new MessageResponse(user.getId(),user.getName(), request.getContent()); //보낼 메세지 객체를 리턴
   }
 
   /**

src/test/java/oncoding/concoder/controller/VideoRoomControllerTest.java

@@ -107,7 +107,7 @@ void joinRoomTest()
 
     //expected result
     UserResponse expectedUser = UserResponse.from(user);
-    MessageResponse expectedMessage = new MessageResponse(user.getId(), "채팅을 보내 봅니다.");
+    MessageResponse expectedMessage = new MessageResponse(user.getId(),user.getName(), "채팅을 보내 봅니다.");
 
 
     // Settings