public void AddNewGenre_GenreWithUniqueName_CreateCalled() { var fakeGenreDTO = new ExtendGenreDTO() { Id = Guid.NewGuid(), NameEn = "uniqueName" }; var fakeGenre = _mapper.Map <Genre>(fakeGenreDTO); _uow.Setup(uow => uow.Genres.Get(It.IsAny <Func <Genre, bool> >())).Returns(new List <Genre>()); _uow.Setup(uow => uow.Genres.Create(fakeGenre)); _sut.AddNew(fakeGenreDTO); _uow.Verify(uow => uow.Genres.Create(It.IsAny <Genre>()), Times.Once); }