public void AddFavorityGenreToFantasyBooks_AddFavorityGenreToBooksOfFantasyGenre()
{
var favorityGenre = "favority";
_repository.AddFavorityGenreToFantasyBooks();
var actualResult = GetBooksOfFantasyGenre();
actualResult.ForEach(book => Assert.Contains(favorityGenre, book.Genre));
_repository.AddFavorityGenreToFantasyBooks();
actualResult.ForEach(book => Assert.Equal(1, book.Genre.Count(item => item == favorityGenre)));
}