public void AlbumArtRepositoryPersistNewArtTest()
 {
     var stream = new MemoryStream();
     stream.WriteByte(0x38);
     var art = new AlbumArt{ AlbumId = 1, ArtStream = stream };
     var target = new AlbumArtRepository("art");
     target.Persist(art);
     Assert.That(File.Exists(Path.Combine("art", "1")));
     using(var nfs = File.Open(Path.Combine("art", 1.ToString()), FileMode.Open))
     {
         Assert.That(nfs.Length, Is.EqualTo(1));
     }
 }