如何使用运算符[]创建模拟类？

我正在上课operator[]， 像这样 ：

class Base
{
  public:
    virtual ~Base(){}
    virtual const int & operator[]( const unsigned int index ) const = 0;
};

如何使用谷歌模拟框架为此方法创建模拟类？

我试过这个：

class MockBase : public Base
{
public:
  MOCK_CONST_METHOD1( operator[],
                      const int& ( const unsigned int )
                      );
};

但这会产生下一个错误：

error: pasting "]" and "_" does not give a valid preprocessing token
error: pasting "]" and "_" does not give a valid preprocessing token
error: pasting "]" and "_" does not give a valid preprocessing token
error: pasting "]" and "_" does not give a valid preprocessing token

The MOCK_METHOD#宏不适用于运算符。中给出的解决方案这条信息 http://groups.google.com/group/googlemock/browse_thread/thread/3bee5c4d556db301?pli=1说创建一个常规的模拟方法：

class Base {
 public:
 virtual ~Base () {}
 virtual bool operator==(const Base &) = 0;
};

class MockBase: public Base {
 public:
 MOCK_METHOD1(Equals, bool(const Base &));
 virtual bool operator==(const Base & rhs) { return Equals(rhs); }
};