模拟类可以从googlemock中的另一个模拟类继承吗？ [英] Can a mock class inherit from another mock class in googlemock?

问题描述

模拟类可以从googlemock中的另一个模拟类继承吗？如果是，请帮助我理解为什么这不工作。

Can a mock class inherit from another mock class in googlemock? If yes, then please help me in understanding why isn't this working.

class IA
{
public:
   virtual int test1(int a) = 0;
};

class IB : public IA
{
public:
   virtual float test2(float b) = 0;
};

class MockA : public IA
{
public:
   MOCK_METHOD1(test1, int (int a));
};

class MockB : public MockA, public IB
{
public:
   MOCK_METHOD1(test2, float (float b));
};

我得到一个无法实例化抽象类错误为 MockB ，但不是 MockA

I get a cannot instantiate abstract class compiler error for MockB but not for MockA

推荐答案

如果您计划使用多重继承，则应使用虚拟继承。

If you plan on using multiple inheritance, you should be using virtual inheritance.

下一个示例编译并链接罚款：

Next example compiles and link fine :

class IA
{
    public:
        virtual int test1(int a) = 0;
};

class IB : virtual public IA
{
    public:
        virtual float test2(float b) = 0;
};

class MockA :virtual public IA
{
    public:
        int test1(int a)
        {
            return a+1;
        }
};

class MockB : public MockA, public IB
{
    public:
        float test2(float b)
        {
            return b+0.1;
        }
};

int main()
{
    MockB b;
    (void)b;
}

这只是您的例子的一个小修改

It is just a small modification of your example

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