public void AddGameAction() { // Arrange var games = new List <Game> { new Game(), new Game() }; _context.Games.AddRange(games); var teams = new List <Team> { new Team(), new Team(), new Team() }; _context.Teams.AddRange(teams); _context.SaveChanges(); var gameAction = new GameAction() { Game = games[1], Team = teams[1] }; // Act _target.AddGameAction(gameAction); // Assert Check.That(_context.GameActions).HasSize(1).And.Contains(gameAction); }