<Cpp> google gtest使用示例

最新推荐文章于 2025-07-14 06:33:50 发布

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最新推荐文章于 2025-07-14 06:33:50 发布

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分类专栏： C/C++ Windows 文章标签： gtest google c++

本文链接：https://blog.youkuaiyun.com/Meta_Cpp/article/details/80843103

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本文介绍了一个使用GTest进行单元测试的例子，展示了如何通过各种断言来验证函数的行为正确性，包括基本的数学运算测试、内存操作测试及测试用例设置。

环境搭建参考我上条博客

#include <iostream>
#include <string>
#include "gtest/gtest.h"

//#ifdef _DEBUG  
//#pragma comment(lib, "gtestd.lib")  
//#pragma comment(lib, "gtest_maind.lib")  
//#else  
//#pragma comment(lib, "gtest.lib")  
//#pragma comment(lib, "gtest_main.lib")   
//#endif

////////////////////////////////////////////////////
int Power(int value)
{
    return value * value;
}

const char *GetBuffer(std::string &str)
{
    return str.c_str();
}

std::string g_str("global string");
std::string g_upstr("GLOBAL sTring");

void Foo()
{
    int *pInt = NULL;
    fprintf(stderr, "Foo death at: %d", __LINE__);
    *pInt = 42;
    _exit(1);
}


TEST(ExpectTest, Expect)
{
    // expect equal
    EXPECT_EQ(4, Power(2)); 
    // expect not equal
    EXPECT_NE(5, Power(-3));
    // expect greater than
    EXPECT_GT(17, Power(4));
    // expect greater or equal
    EXPECT_GE(16, Power(4));
    // expect less or equal
    EXPECT_LE(15, Power(4));
    // expect less
    EXPECT_LT(14, Power(4));


    // expect boolean true
    EXPECT_TRUE(Power(-5) > 0);
    // expect boolean false
    EXPECT_FALSE(3 == Power(3));

    // expect string equal
    EXPECT_STREQ(g_str.c_str(), GetBuffer(g_str));
    // expect string not equal
    EXPECT_STRNE(NULL, GetBuffer(g_str));
    // expect string case equal
    EXPECT_STRCASEEQ(g_str.c_str(), GetBuffer(g_str));
    // expect string case not equal
    EXPECT_STRCASEEQ(g_str.c_str(), GetBuffer(g_upstr));

}
// 系统优化运行test_case_name中包含DeathTest的测试实例
TEST(FooDeathTest, Demo)
{
    EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
    /* 
     "    Result: died but not with expected exit code:\n"
     "            " << ExitSummary(status()) << "\n"
     "Actual msg:\n" << FormatDeathTestOutput(error_message);
    */
    //EXPECT_DEATH(Foo(), "Foo death at: .*");
}

////////////////////////////////////////////////////
class FixtureTest : public testing::Test 
{
protected:
    FixtureTest() : m_a(0), m_b(1) {}

    void SetUp() {
        m_a++;  
        m_b--;
        m_strStatus = "setup";
    }

    int m_a;
    int m_b;
    std::string m_strStatus;
};

TEST_F(FixtureTest, TestSetup)
{
    EXPECT_EQ(m_a, 1);
    EXPECT_FALSE(m_a == m_b);
    EXPECT_STREQ("setup", m_strStatus.c_str());
}
///////////////////////////////////////////////

int main(int argc, char* argv[])
{
    ::testing::InitGoogleTest(&argc, argv);
    RUN_ALL_TESTS();

    getchar();
    return 0;
}