public void AddMovieToWishListShouldAddMovieToWishListMovies()
        {
            DbContextOptions <UltimateMoviesDbContext> options = new DbContextOptionsBuilder <UltimateMoviesDbContext>()
                                                                 .UseInMemoryDatabase(databaseName: "Users_AddMovieToWishList_Database")
                                                                 .Options;
            UltimateMoviesDbContext db = new UltimateMoviesDbContext(options);

            IUsersService usersService = new UsersService(db);

            db.Users.Add(new UMUser {
                UserName = "******"
            });

            db.SaveChanges();

            db.Movies.Add(new Movie {
                Name = "Test 1"
            });

            db.SaveChanges();

            usersService.AddMovieToWishList("Tester", db.Movies.Last().Id);

            int wishListMoviesCount = db.WishListMovies.Count();

            Assert.Equal(1, wishListMoviesCount);
        }