public void TestInit() { var playlistOptions = new DbContextOptionsBuilder <PlaylistContext>() .UseInMemoryDatabase("Rooms") .Options; _playlistContext = new PlaylistContext(playlistOptions); _playlistContext.Add(new Room() { Id = 1, Name = "Room one", }); _playlistContext.Add(new Room() { Id = 2, Name = "Room Two", }); _playlistContext.Add(new Room() { Id = 3, Name = "Room Three", }); _playlistContext.SaveChanges(); }