public void AddNode()
{
// Arrange
var games = new List <Game>()
{
new Game(), new Game()
{
Nodes = new List <Node>()
{
new TimerNode()
}
}, new Game()
};
_context.Games.AddRange(games);
_context.SaveChanges();
var node = new TimerNode();
// Act
_target.AddNode(games[1].Id, node);
// Assert
Check.That(games[1].Nodes).HasSize(2);
}