public async Task GetGenres_ReturnsObjectResult()
        {
            // Arrange
            List <Genre> genres = new List <Genre>()
            {
                new Genre()
                {
                    Id   = 1,
                    Name = "Horror alt."
                },
                new Genre()
                {
                    Id   = 2,
                    Name = "Spooky"
                }
            };

            _mockRepo.Setup(repo => repo.GetAll <Genre>()).ReturnsAsync(genres);

            // Act
            var response = await _genresController.GetAll(1);

            // Assert
            Assert.IsAssignableFrom <ObjectResult>(response.Result);
        }