public void CanUpdateGuildAndSaveToDatabase() { DbContextOptions <GuildAPIDbContext> options = new DbContextOptionsBuilder <GuildAPIDbContext>() .UseInMemoryDatabase("CanUpdateGuildAndSaveToDatabase") .Options; using GuildAPIDbContext context = new GuildAPIDbContext(options); GamesService gameService = new GamesService(context); GamesDTO gamesDTO = new GamesDTO() { Name = "Odins Game" }; var createdGame = gameService.Create(gamesDTO); GuildService guildService = new GuildService(context, gameService); Assert.Equal(1, context.Games.CountAsync().Result); GuildsDTO guild = new GuildsDTO() { Name = "Odin Slayers" }; var creation = guildService.Create(guild); var association = gameService.AddGameGuild(createdGame.Result.Id, creation.Result.Id); GuildsDTO guildsDTO = new GuildsDTO() { Id = 1, Name = "I am updated" }; var update = guildService.Update(guildsDTO).Result; var actual = context.Guilds.FindAsync(update.Id).Result; Assert.Equal(1, context.Guilds.CountAsync().Result); Assert.IsType <Guilds>(actual); Assert.Equal(1, actual.Id); Assert.Equal("I am updated", actual.Name); }