Google mock:模仿家长类？

class Parent {
public:
    virtual ~Parent() {}

    virtual void do_something() {
        // ... 真实的实现 ...
    }

    virtual int calculate(int a, int b) {
        // ... 真实的实现 ...
        return a + b;
    }
};

#include "gmock/gmock.h"

class MockParent : public Parent {
public:
    MOCK_METHOD(void, do_something, (), (override));
    MOCK_METHOD(int, calculate, (int a, int b), (override));
};

#include "gtest/gtest.h"

TEST(ParentTest, DoSomething) {
    MockParent mock_parent;

    // 设置期望：当调用do_something()时，不执行任何操作
    EXPECT_CALL(mock_parent, do_something()).Times(1);

    // 调用do_something()方法
    mock_parent.do_something();
}

TEST(ParentTest, Calculate) {
    MockParent mock_parent;

    // 设置期望：当调用calculate(2, 3)时，返回5
    EXPECT_CALL(mock_parent, calculate(2, 3)).WillOnce(::testing::Return(5));

    // 调用calculate()方法并验证结果
    int result = mock_parent.calculate(2, 3);
    EXPECT_EQ(result, 5);
}