完成RoomService类编写，通过单元测试

src/main/java/cn/mafangui/hotel/mapper/RoomMapper.java

@@ -1,7 +1,10 @@
 package cn.mafangui.hotel.mapper;
 
 import cn.mafangui.hotel.entity.Room;
+import org.springframework.stereotype.Component;
 
+import java.util.List;
+@Component
 public interface RoomMapper {
     int deleteByPrimaryKey(Integer roomId);
 
@@ -14,4 +17,10 @@ public interface RoomMapper {
     int updateByPrimaryKeySelective(Room record);
 
     int updateByPrimaryKey(Room record);
+
+    List<Room> selectByType(Integer typeId);
+
+    List<Room> selectByStatus(Integer roomStatus);
+
+    List<Room> selectAll();
 }