public void ShouldRemoveOnGameOverEventWhenFinish()
{
gameServer.Register(gridOne);
gameServer.Register(gridTwo);
gameServer.StartNewGame();
gridOne.Received().OnGameOverEvent += Arg.Any <OnGameOverEventHandler>();
gridTwo.Received().OnGameOverEvent += Arg.Any <OnGameOverEventHandler>();
gameServer.FinishGame();
gridOne.Received().OnGameOverEvent -= Arg.Any <OnGameOverEventHandler>();
gridTwo.Received().OnGameOverEvent -= Arg.Any <OnGameOverEventHandler>();
}