修复了测试框架编译缺少头文件的问题

添加了测试示例

include/bus_io.h

@@ -2,8 +2,8 @@
 // Created by ricardo on 2022/5/6.
 //
 
-#ifndef AUTO_PILOT_BUS_IO_H
-#define AUTO_PILOT_BUS_IO_H
+#ifndef AUTO_PILOT_BUS_BUS_IO_H
+#define AUTO_PILOT_BUS_BUS_IO_H
 #include "rail.h"
 #include "query.h"
 
@@ -49,4 +49,4 @@ read_state_t ReadInput(up_bus_t* up_queries, down_bus_t* down_queries);
  */
 void PrintState(up_bus_t* up_queries, down_bus_t* down_queries, rail_node_t* rails);
 
-#endif //AUTO_PILOT_BUS_IO_H
+#endif //AUTO_PILOT_BUS_BUS_IO_H

include/rail.h

@@ -38,4 +38,6 @@ extern rail_node_t* rails;
  */
 rail_node_t *FindNode(int id);
 
+int add(int a, int b);
+
 #endif //AUTO_PILOT_BUS_RAIL_H