public async Task SaveFavorites_ReturnsUserWithFavorites() { #region Arrange InMemoryUserRepository inMemoryUserRepository = new InMemoryUserRepository(memoryCache); UserId userId = new UserId(UserIdMother.Id()); User user = new User(userId); PokemonId pokemonId = PokemonIdMother.PokemonId(); user.AddPokemonFavorite(new PokemonFavorite(pokemonId)); #endregion #region Act await inMemoryUserRepository.Save(user); User userFound = await inMemoryUserRepository.Find(userId); await inMemoryUserRepository.SaveFavorites(user); #endregion #region Assert var pokemonFavoritesArray = userFound.PokemonFavorites.Favorites.Select(s => s.PokemonId.Id.ToString()).ToArray(); Assert.Equal(pokemonFavoritesArray, PokemonFavoritesMother.PokemonFavorites().Favorites.Select(s => s.PokemonId.Id.ToString()).ToArray(), StringComparer.InvariantCultureIgnoreCase); #endregion }