NeedsObject needs an instance of Object. In order to manage the scope of the Object instance, a class is derived from NeedsObject and it's put in charge of the Object instance lifetime. This allows the creation of another class for testing purposes.

endo.cc

class Object {
public:
	Object() { }

	virtual ~Object() { }
};

class NeedsObject {
protected:
	NeedsObject(Object *object) : object(object) { }

	~NeedsObject() { }

protected:
	void setup() { }

	void shutdown() { }

private:
	NeedsObject();

	Object * object;
};

template <class ObjectType>
class NeedsObjectContainer : public NeedsObject {
public:
	NeedsObjectContainer() : NeedsObject(&object) {
		setup();
	}

	~NeedsObjectContainer() {
		shutdown();
	}

private:
	ObjectType object;
};

typedef NeedsObjectContainer<Object> MyNeedsObject;

class MockObject : public Object {
public:
	MockObject() { }

	virtual ~MockObject() { }
};

typedef NeedsObjectContainer<MockObject> TestNeedsObject;