public void CreateMovie_CheckDuplicateTitle_ShouldThrowException() { var data = new List <Movie> { new Movie { Title = "Movie" } }; MovieViewModel movieModel = new MovieViewModel { Title = "Movie" }; var mockSet = new Mock <IRepository <Movie> >(); mockSet.Setup(m => m.GetData()).Returns(() => data); MovieService movService = new MovieService(mockSet.Object); movService.CreateData(movieModel); }