public void MergePhotosWithAlbums_EmptyPhotosAndAlbumsList_ReturnsEmptyList()
        {
            var photosList = new List <Photo>();
            var albumsList = new List <Album>();
            var result     = _service.MergePhotosWithAlbums(photosList, albumsList);

            Assert.IsNotNull(result);
            Assert.AreEqual(0, result.Count());
        }