GTest test case "EXPECT_CALL" compilation error

#include "gtest\gtest.h"
using namespace testing;

class MyGTest : public Test
{
public:
    void f(){}
    void g(){
        f();
        f();
    }
};

TEST_F(MyGTest, first)
{
    EXPECT_CALL(*this, f()).Times(2);
    g();
}

VC2013 says:

    "MyGTest_first_Test" has no member "gmock_f"

What does it mean? I expect the call to g() to call f() for 2 times. Any syntax error I made?