修复了测试框架编译缺少头文件的问题

添加了测试示例

test/CMakeLists.txt

@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 3.0)
 project(bus_test)
 
+set(CMAKE_CXX_STANDARD 11)
+
 add_subdirectory(./GTest)
 
 include_directories(GTest/googletest/include)

test/io_test.cpp

@@ -0,0 +1,21 @@
+//
+// Created by ricardo on 2022/5/7.
+//
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+extern "C"
+{
+#include "rail.h"
+}
+
+using ::testing::Return;
+using ::testing::AtLeast;
+using ::testing::Exactly;
+
+using namespace testing;
+
+TEST(test, test)
+{
+    int result = add(1, 1);
+    EXPECT_EQ(2, result);
+}