Google Test WillOnce(Return())操作预期的返回值

我目前正在尝试用c++测试google test的功能。(更具体地说:google mock)

现在我遇到了一个问题。这应该是非常容易的,它以前工作过,但不知怎么搞砸了,框架没有按预期工作。够了,这是我的问题。

我试着做一件简单的事情,看看函数“DoSomeMathTurtle”是否被调用一次并返回期望值。但是“.WillOnce(Return(x))”操纵期望值,使其始终为真。

class Turtle {
    ...
    virtual int DoSomeMathTurtle(int , int); //Adds two ints together and returns them
    ...
};

我的嘲笑班:

    class MockTurtle : public Turtle{
    public:
        MockTurtle(){
            ON_CALL(*this, DoSomeMathTurtle(_, _))
                .WillByDefault(Invoke(&real_, Turtle::DoSomeMathTurtle)); 
            //I did this so the function gets redirected to a real
            // object so those two numbers actually get added together 
            //(without that it returns always 0)

        }
        MOCK_METHOD2(DoSomeMathTurtle, int(int, int));
    private:
        Turtle real_;
    };

基本测试等级:

class TestTurtle : public ::testing::Test{
protected:
    //De- & Constructor
    TestTurtle(){}
    virtual ~TestTurtle(){} //Has to be virtual or all tests will fail

    //Code executed before and after every test
    virtual void SetUp(){}
    virtual void TearDown(){}

    //Test Fixtures which can be used in each test
    MockTurtle m_turtle;
 };

    TEST_F(TestTurtle, MathTest){
            int x = 2; // Expected value
            int rvalue; // Returned value of the function

            EXPECT_CALL(m_turtle, DoSomeMathTurtle(_, _))
                .Times(1)
                .WillOnce(Return(x));

                rvalue = m_turtle.DoSomeMathTurtle(3,3); // rvalue should be 6 but it is 2
                cout << "[          ] Expected value: " << x << " Returned value " << rvalue << endl;
                //This prints: [          ] Expected value 2 Returned value 2
                //Then the test passes !?
            }
        }

当我评论 "WillOnce(Return(x))" 出,rvalue变成6(它应该变成的值)。什么时候? “WillOnce(返回(x))” &安培;

ON_CALL(*this, DoSomeMathTurtle(_, _))
                .WillByDefault(Invoke(&real_, Turtle::DoSomeMathTurtle)); 

所以只要 “WillOnce(返回(x))” "x" .

提前谢谢你的帮助! 祝你有一个愉快的,没有虫子的一天!