public void ShoulRollbackPlayerSnap()
{
//set Player to level 1 stage
player.Level = 1;
player.Score = 10;
player.Timestamp = DateTime.Now;
var snap = player.CreatePlayerSnap();
playerHistory.AddPlayerSnap(snap);
//set Player to level 2 stage
player.Level = 2;
player.Score = 20;
player.Timestamp = DateTime.Now;
//rollback player to previous level
player.RestorePlayerSnap(playerHistory.GetPlayerSnap());
Assert.AreEqual(player.Level, 1);
Assert.AreEqual(player.Score, 10);
}