title: Is there any mocking framework that allows to mock std::ifstream and other I/O libraries?
body: <p>I work on a really old C++ project which has a huge DB I need to mock.
  I am trying to mock ifstream library in order to test the control on files, the problem is that I can't change my legacy code so i am having a hard time finding the abilty to mock without changing  any piece of the code
  Thanks in advance</p>