public void FilterOnlyReturnsOnlyAudioDramasThatDontHaveANumber()
        {
            var provider         = new SampleAudioDramaProvider();
            var audioDramas      = provider.Get().ToList();
            var expectedFiltered = audioDramas.Where(x => x.AudioDramaDto.NumberEuropa.HasValue == false).ToList();
            var filter           = new SpecialAudioDramasOnlyFilter();

            var filtered = filter.Filter(audioDramas).ToList();

            CollectionAssert.AreEqual(expectedFiltered, filtered);
        }