public async Task GetByGenreAsyncTest()
        {
            _moviesRepositoryMock
            .Setup(x => x.GetByGenreAsync(It.IsAny <MovieGenre>()))
            .ReturnsAsync((MovieGenre x) => new List <Movie>().AsEnumerable())
            .Verifiable();

            var result = await _service.GetByGenreAsync(MovieGenre.Action);

            _moviesRepositoryMock.VerifyAll();
        }