Mocking using boost::shared_ptr and AMOP

Posted by Edison Gustavo Muenz on Stack Overflow See other posts from Stack Overflow or by Edison Gustavo Muenz
Published on 2009-10-27T21:13:44Z Indexed on 2010/05/18 13:50 UTC
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Hi, I'm trying to write mocks using amop. I'm using Visual Studio 2008.

I have this interface class:

struct Interface {
   virtual void Activate() = 0;
};

and this other class which receives pointers to this Interface, like this:

struct UserOfInterface {
   void execute(Interface* iface) {
      iface->Activate();
   }
};

So I try to write some testing code like this:

amop::TMockObject<Interface> mock;
mock.Method(&Interface::Activate).Count(1);

UserOfInterface user;
user.execute((Interface*)mock);

mock.Verifiy();

It works! So far so good, but what I really want is a boost::shared_ptr in the execute() method, so I write this:

struct UserOfInterface {
   void execute(boost::shared_ptr<Interface> iface) {
      iface->Activate();
   }
};

How should the test code be now? I tried some things, like:

amop::TMockObject<Interface> mock;
mock.Method(&Interface::Activate).Count(1);

UserOfInterface user;
boost::shared_ptr<Interface> mockAsPtr((Interface*)mock);
user.execute(mockAsPtr);

mock.Verifiy();

It compiles, but obviously crashes, since at the end of the scope the variable 'mock' gets double destroyed (because of the stack variable 'mock' and the shared_ptr).

I also tried to create the 'mock' variable on the heap:

amop::TMockObject<Interface>* mock(new amop::TMockObject<Interface>);
mock->Method(&Interface::Activate).Count(1);

UserOfInterface user;
boost::shared_ptr<Interface> mockAsPtr((Interface*)*mock);
user.execute(mockAsPtr);

mock->Verifiy();

But it doesn't work, somehow it enters an infinite loop, before I had a problem with boost not finding the destructor for the mocked object when the shared_ptr tried to delete the object.

Has anyone used amop with boost::shared_ptr successfully?

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