public void GetContactById() { //Arrange var mockUnitOfWork = new Mock <IUnitOfWork>(); //Esperamos que se llame al metodo Get del ContactRepository con un int mockUnitOfWork.Setup(un => un.ContactRepository.GetByID(It.IsAny <int>())); ContactValidator contactValidator = new ContactValidator(mockUnitOfWork.Object); //Act Contact returnedContact = contactValidator.GetContact("5"); //Assert //mockUnitOfWork.VerifyAll(); }