gtest和gmock是针对c/c++的单元测试框架。
嵌入式中大多采用C语言进行开发，为了使用gmock对C语言项目进行单元测试，存在一些而外的工作需要做。
一、环境搭建
1.安装mingw
https://osdn.net/projects/mingw/releases/
添加E:\MinGW\mingw64\bin 到系统环境变量中
2.下载gtest gmock源码
https://github.com/google/googletest
二、编译gmock
1.拷贝E:\MinGW\mingw64\bin\mingw32-make.exe 到 E:\googletest-master\googlemock\make\mingw32-make.exe
2.执行E:\googletest-master\googlemock\make\mingw32-make.exe
运行结果将生成gmock_test.exe
运行gmock_test.exe
至此，gmock编译完成
三、适配到C语言项目中使用
1、在C语言项目中使用gtest
2、在C语言项目中使用gmock
定义mock 类
描述mock类中的方法
实例化mock类得到实例
使用函数包装mock类中的方法
使用mock函数进行单元测试
在googletest目录下新建一个test_c_code目录
新建两个C语言文件和一个C++测试文件：
code_in_c.h
#ifndef __CODE_IN_C_H__
#define __CODE_IN_C_H__
typedef struct c_struct_t{
char *p_c_pointer;
int(*p_c_func)(struct c_struct_t*);
}c_struct_t;
int c_func_caller(c_struct_t* p_c_struct);
#endif
code_in_c.c
#include "code_in_c.h"
#include <stdio.h>
int c_func(c_struct_t *p_c_struct)
printf("%s", p_c_struct->p_c_pointer);
return 0;
int c_func_caller(c_struct_t* p_c_struct)
char words[40] = "hello, gmock test c code";
char *p_words = words;
int ret;
p_c_struct->p_c_pointer = p_words;
ret = p_c_struct->p_c_func(p_c_struct);
return ret;
void main(void)
c_struct_t c_struct;
c_struct.p_c_func = c_func;
c_func_caller(&c_struct);
gmock_test_c_code.cc
#include <gtest/gtest.h>
#include <gmock/gmock.h>
extern "C"
#include "code_in_c.h"
using namespace testing;
class Mock_FOO {
public:
MOCK_METHOD1(set, int(int num));
MOCK_METHOD0(get, int());
MOCK_METHOD1(mock_c_func, int(c_struct_t *p_c_struct));
Mock_FOO mocker;
int mock_c_func(c_struct_t *p_c_struct) {
return mocker.mock_c_func(p_c_struct);
TEST(Atest, test_c_func_000)
EXPECT_CALL(mocker, mock_c_func(IsNull())).WillRepeatedly(Return(654));
c_struct_t c_struct_foo;
c_struct_foo.p_c_func = mock_c_func;
int ret = c_func_caller(&c_struct_foo);
EXPECT_EQ(456, ret);
TEST(Atest, test_c_func_001)
EXPECT_CALL(mocker, mock_c_func(An<c_struct_t *>())).WillRepeatedly(Return(654));
c_struct_t c_struct_foo;
c_struct_foo.p_c_func = mock_c_func;
int l = c_func_caller(&c_struct_foo);
EXPECT_EQ(654, l);
int main(int argc, char *argv[]) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
修改E:\googletest-master\googlemock\make\Makefile,使得编译系统能够编译我们刚才添加的三个文件。
Makefile
# A sample Makefile for building both Google Mock and Google Test and
# using them in user tests. This file is self-contained, so you don't
# need to use the Makefile in Google Test's source tree. Please tweak
# it to suit your environment and project. You may want to move it to
# your project's root directory.
# SYNOPSIS:
# make [all] - makes everything.
# make TARGET - makes the given target.
# make clean - removes all files generated by make.
# Please tweak the following variable definitions as needed by your
# project, except GMOCK_HEADERS and GTEST_HEADERS, which you can use
# in your own targets but shouldn't modify.
# Points to the root of Google Test, relative to where this file is.
# Remember to tweak this if you move this file, or if you want to use
# a copy of Google Test at a different location.
GTEST_DIR = ../../googletest
# Points to the location of the Google Test libraries
GTEST_LIB_DIR = .
# Points to the root of Google Mock, relative to where this file is.
# Remember to tweak this if you move this file.
GMOCK_DIR = ..
# Where to find user code.
# USER_DIR = ../test
USER_DIR = ../test_c_code
# Flags passed to the preprocessor.
# Set Google Test and Google Mock's header directories as system
# directories, such that the compiler doesn't generate warnings in
# these headers.
CPPFLAGS += -isystem $(GTEST_DIR)/include -isystem $(GMOCK_DIR)/include
# Flags passed to the C++ compiler.
CXXFLAGS += -g -Wall -Wextra -pthread -std=c++11
# Google Test libraries
GTEST_LIBS = libgtest.a libgtest_main.a libgmock.a libgmock_main.a
# All tests produced by this Makefile. Remember to add new tests you
# created to the list.
# TESTS = gmock_test
TESTS = gmock_test_c_code
# All Google Test headers. Usually you shouldn't change this
# definition.
GTEST_HEADERS = $(GTEST_DIR)/include/gtest
