GMock 测试夹具在 Windows 上崩溃

Question

我是 GMock 框架的新手。但是，我有以下生产应用程序 productionApp 和测试应用程序 testApp。我的生产应用程序完美运行。但是在夹具中执行第一个测试后测试崩溃。

class IRegEditor
{
public:
    virtual bool Read(int&) = 0;
    virtual bool Write(const int&) = 0;
    virtual ~IRegEditor() {}
};

class RegEditorImpl : public IRegEditor
{
public:
    //use windows registry APIs instead
    //read returns values based on current time.
    //write fails for odd values.
    bool Read(int& i) { if (system_clock::now().time_since_epoch().count() % 2)                 
    return false; else { i = 10; return true; } }
    bool Write(const int& j) { if (j % 2) return false; else return true; }
};

class RegEditorMock : public IRegEditor
{
public:
    MOCK_METHOD1(Read, bool(int&));
    MOCK_METHOD1(Write, bool(const int&));
};

class RegEditTest : public ::testing::Test
{
protected:
    virtual void SetUp() {
        regEditor.reset(&regMock);
    }

    std::shared_ptr<IRegEditor> regEditor;
    RegEditorMock regMock;
};

class App
{
    std::shared_ptr<IRegEditor> regEdit;
public:
    //ctor to use in production
    App() :regEdit{ std::make_shared<RegEditorImpl>() }
    {}  
    //overloaded ctor to use for unit tests
    App(std::shared_ptr<IRegEditor> regEditor) : regEdit{ regEditor }
    {}
    bool Writer(const int& number)
    {
        if (regEdit->Write(number)) 
        { std::cout << "write passed" << std::endl; return true; }
        else 
        { std::cout << "write failed" << std::endl; return false; }
    }
    bool Reader(int& number)
    {
        if (regEdit->Read(number)) 
        { std::cout << "read passed" << std::endl; return true; }
        else { std::cout << "read failed" << std::endl; return false; }
    }
};

TEST_F(RegEditTest, writeFails)
{
    int number = 1;
    EXPECT_CALL(regMock, Write(number)).Times(1).WillOnce(Return(false));

    App testApp(regEditor);
    EXPECT_FALSE(testApp.Writer(number));
}

TEST_F(RegEditTest, writeSucceeds)
{
    int number = 2;
    EXPECT_CALL(regMock, Write(number)).Times(1).WillOnce(Return(true));

    App testApp(regEditor);
    EXPECT_FALSE(testApp.Writer(number));
}

int main(int argc, char** argv) {
    // The following line must be executed to initialize Google Mock
    // (and Google Test) before running the tests.
    ::testing::InitGoogleMock(&argc, argv);
    return RUN_ALL_TESTS();
}

我在运行测试中收到以下错误。它与 GMock 库的编译器设置兼容性有什么关系吗？

Unhandled exception at 0x77639D71 (ntdll.dll)
A heap has been corrupted (parameters: 0x7766D8D0).

然后显示，它无法从 wntdll.pdb.

加载符号

以下生产应用按预期工作

int main()
{
    App productionApp;
    int num = 9;
    productionApp.Reader(num);
    productionApp.Writer(num);
    std::cin.get();
    return 0;
}

Answer 1

一个人不能做 regEditor.reset(&regMock); 这使得 regEditor 拥有本地 regMock，现在，因为 regMock 有两个所有者：它的自动存储持续时间，加上共享指针regEditor - 当范围结束时，内存已损坏。这与 GMock 或 GTest 版本或编译器设置或兼容性没有任何关系。这是因为我对 shared_ptr 的错误使用。感谢 Jarod42 和 Angew 的帮助。请参考如何使用shared_ptr从外部提供模拟对象？

GMock 测试夹具在 Windows 上崩溃

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c++

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gmock