test: improve blackjack play tests and logging
Refactor `RunRound` to `RunUntilDone` to allow for multi-round simulations until a win/loss condition is met. Added round summaries, win/loss/push tracking, and improved log formatting to provide better visibility into agent performance.
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@ -8,6 +8,9 @@ namespace Game.Blackjack.Tests;
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public class PlayTests
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{
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private const int StartingChips = 100;
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private const int BetAmount = 10;
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[Fact]
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public void Play_BasicStrategy()
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{
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@ -25,10 +28,10 @@ public class PlayTests
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log.Reactivity.Add($"{change.Kind} GameState = {state}");
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});
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log.Header = "Blackjack: Basic Strategy (seed=42)";
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var agent = new BasicStrategyAgent();
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RunRound(world, group, agent, log);
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log.Header = $"Blackjack: Basic Strategy (seed=42, agent={agent})";
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RunUntilDone(world, group, agent, log);
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log.FinalSnapshot = SnapshotWorld(world);
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@ -53,10 +56,10 @@ public class PlayTests
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log.Reactivity.Add($"{change.Kind} GameState = {state}");
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});
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log.Header = "Blackjack: Random Agent (seed=123)";
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var agent = new RandomBlackjackAgent();
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RunRound(world, group, agent, log);
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log.Header = $"Blackjack: Random Agent (seed=123, agent={agent})";
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RunUntilDone(world, group, agent, log);
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log.FinalSnapshot = SnapshotWorld(world);
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@ -85,10 +88,10 @@ public class PlayTests
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pool.Add(new BasicStrategyAgent(), 7);
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pool.Add(new RandomBlackjackAgent(), 3);
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log.Header = $"Blackjack: Weighted Pool (seed=77, agent={pool.LastPicked})";
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var agent = pool.Pick();
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RunRound(world, group, agent, log);
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log.Header = $"Blackjack: Weighted Pool (seed=77, agent={agent})";
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RunUntilDone(world, group, agent, log);
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log.FinalSnapshot = SnapshotWorld(world);
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@ -101,6 +104,7 @@ public class PlayTests
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private sealed class PlayLog
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{
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public string Header { get; set; } = "";
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public readonly List<string> RoundSummaries = new();
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public readonly List<string> Decisions = new();
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public readonly List<string> Reactivity = new();
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public string FinalSnapshot { get; set; } = "";
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@ -111,6 +115,10 @@ public class PlayTests
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sb.AppendLine(Header);
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sb.AppendLine(new string('=', Header.Length));
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sb.AppendLine();
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sb.AppendLine("--- Round Summaries ---");
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for (int i = 0; i < RoundSummaries.Count; i++)
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sb.AppendLine($" Round {i + 1}: {RoundSummaries[i]}");
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sb.AppendLine();
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sb.AppendLine("--- Decisions ---");
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for (int i = 0; i < Decisions.Count; i++)
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sb.AppendLine($" {i + 1}. {Decisions[i]}");
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@ -140,7 +148,7 @@ public class PlayTests
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{
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Phase = GamePhase.Betting,
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Result = RoundResult.None,
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Chips = 100,
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Chips = StartingChips,
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CurrentBet = 0,
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RoundNumber = 1,
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Seed = seed
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@ -150,27 +158,96 @@ public class PlayTests
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return (world, group);
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}
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private static void RunRound(World world, SystemGroup group, IBlackjackAgent agent, PlayLog log)
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/// <summary>
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/// Runs rounds until the player runs out of chips (can't afford minimum bet)
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/// or doubles their starting chips.
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/// </summary>
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private static void RunUntilDone(World world, SystemGroup group, IBlackjackAgent agent, PlayLog log)
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{
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world.Commands.Enqueue(new PlaceBetCommand { Amount = 10 });
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int totalRounds = 0;
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int wins = 0;
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int losses = 0;
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int pushes = 0;
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while (true)
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{
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var state = world.ReadSingleton<GameState>();
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int chips = state.Chips;
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// Stop conditions.
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if (chips < BetAmount)
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{
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log.Header += $" — BUSTED after {totalRounds} rounds";
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break;
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}
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if (chips >= StartingChips * 2)
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{
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log.Header += $" — DOUBLED after {totalRounds} rounds";
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break;
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}
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// Safety: max 200 rounds to prevent infinite loops.
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if (totalRounds >= 200)
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{
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log.Header += $" — MAX ROUNDS ({totalRounds})";
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break;
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}
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// Place bet and run dealing.
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world.Commands.Enqueue(new PlaceBetCommand { Amount = BetAmount });
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group.RunLogical();
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// Player turn: agent decides hit/stand.
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int roundHits = 0;
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while (world.ReadSingleton<GameState>().Phase == GamePhase.PlayerTurn)
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{
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var total = HandUtil.CalculateHand(world, new PlayerHand());
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var decision = agent.Decide(world);
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log.Decisions.Add($"Hand={total}, Decision={decision}");
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log.Decisions.Add($"R{totalRounds + 1} Hand={total}, Decision={decision}");
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if (decision == BlackjackDecision.Hit)
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{
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world.Commands.Enqueue(new HitCommand());
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roundHits++;
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}
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else
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{
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world.Commands.Enqueue(new StandCommand());
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}
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group.RunLogical();
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}
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var state = world.ReadSingleton<GameState>();
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log.Header += $" — Result: {state.Result}";
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// Record round result.
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state = world.ReadSingleton<GameState>();
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int newChips = state.Chips;
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int delta = newChips - chips;
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string summary = $"{state.Result} | Bet={BetAmount} | Chips: {chips}→{newChips} ({delta:+0;-#}) | Hits: {roundHits}";
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log.RoundSummaries.Add(summary);
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switch (state.Result)
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{
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case RoundResult.PlayerWin:
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case RoundResult.DealerBust:
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wins++;
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break;
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case RoundResult.DealerWin:
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case RoundResult.PlayerBust:
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losses++;
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break;
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case RoundResult.Push:
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pushes++;
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break;
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}
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totalRounds++;
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// Start next round.
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world.Commands.Enqueue(new NewRoundCommand());
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group.RunLogical();
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}
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log.Header += $" | W:{wins} L:{losses} P:{pushes}";
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}
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// ── Snapshot ──────────────────────────────────────────────────────
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@ -181,6 +258,7 @@ public class PlayTests
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var state = world.ReadSingleton<GameState>();
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sb.AppendLine($"Phase: {state.Phase}");
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sb.AppendLine($"Chips: {state.Chips}, Bet: {state.CurrentBet}");
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sb.AppendLine($"Round: {state.RoundNumber}");
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sb.AppendLine($"Result: {state.Result}");
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var playerHand = FindEntity<PlayerHand>(world);
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@ -237,6 +315,7 @@ public class PlayTests
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{
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var content = File.ReadAllText(path);
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content.Should().Contain("--- Round Summaries ---");
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content.Should().Contain("--- Decisions ---");
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content.Should().Contain("--- Reactivity ---");
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content.Should().Contain("--- Final State ---");
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@ -279,7 +358,6 @@ public class PlayTests
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private readonly List<(IBlackjackAgent Agent, int Weight)> _agents = new();
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private int _totalWeight;
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private static readonly Random _rng = new();
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public string LastPicked { get; private set; } = "";
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public void Add(IBlackjackAgent agent, int weight)
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{
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@ -295,12 +373,8 @@ public class PlayTests
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{
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cumulative += weight;
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if (roll < cumulative)
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{
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LastPicked = agent.ToString()!;
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return agent;
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}
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}
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LastPicked = _agents[^1].Agent.ToString()!;
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return _agents[^1].Agent;
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}
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}
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@ -46,6 +46,7 @@ public struct NewRoundCommand : ICommand
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}
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}
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state.RoundNumber++;
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state.Phase = GamePhase.Betting;
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state.Result = RoundResult.None;
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world.MarkModified<GameState>(World.SingletonEntity);
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