How to mock templated methods using Google Mock?

In previous version of Google Mock you can only mock virtual functions, see the documentation in the project’s page.

More recent versions allowed to mock non-virtual methods, using what they call hi-perf dependency injection.

As user @congusbongus states in the comment below this answer:

Google Mock relies on adding member variables to support method mocking, and since you can’t create template member variables, it’s impossible to mock template functions

A workaround, by Michael Harrington in the googlegroups link from the comments, is to make specialized the template methods that will call a normal function that can be mocked. It doesn’t solve the general case but it will work for testing.

struct Foo
{
    MOCK_METHOD1(GetValueString, void(std::string& value));

    template <typename ValueType>
    void GetValue(ValueType& value); 

    template <>
    void GetValue(std::string& value) {
        GetValueString(value);
    } 
};