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))); }