feat: add OECS.PlayTest project
Introduce a new PlayTest project containing tools for simulating gameplay, including: - Agent abstractions (IAgent, GreedyAgent, WeightedAgentPool) - ObservableCapture for logging entity changes - PlayLog for generating and saving formatted play logs
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using OECS;
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namespace OECS.PlayTest;
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/// <summary>
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/// Abstract agent that picks the action with the highest score.
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/// When <see cref="ScoreAction"/> returns 0 for all actions (the default),
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/// the agent behaves as a uniform random agent over legal actions.
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/// Ties are broken randomly.
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/// </summary>
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public abstract class GreedyAgent<TDecision> : IAgent<TDecision>
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{
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private static readonly Random _rng = new();
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/// <summary>
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/// Returns the list of currently legal actions.
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/// </summary>
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protected abstract List<TDecision> GetLegalActions(World world);
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/// <summary>
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/// Scores an action. Defaults to 0 (uniform random).
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/// </summary>
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protected virtual float ScoreAction(World world, TDecision action) => 0f;
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public TDecision Decide(World world)
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{
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var actions = GetLegalActions(world);
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if (actions.Count == 0)
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throw new InvalidOperationException(
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$"{GetType().Name}: no legal actions available");
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if (actions.Count == 1)
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return actions[0];
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float bestScore = float.MinValue;
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var bestActions = new List<TDecision>();
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foreach (var action in actions)
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{
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float score = ScoreAction(world, action);
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if (score > bestScore)
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{
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bestScore = score;
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bestActions.Clear();
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bestActions.Add(action);
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}
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else if (score == bestScore)
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{
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bestActions.Add(action);
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}
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}
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return bestActions[_rng.Next(bestActions.Count)];
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}
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}
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using OECS;
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namespace OECS.PlayTest;
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/// <summary>
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/// An AI player that inspects the world and returns a decision.
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/// </summary>
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public interface IAgent<TDecision>
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{
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TDecision Decide(World world);
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}
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namespace OECS.PlayTest;
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/// <summary>
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/// A pool of agents selected by weight. Higher weight = more likely to be picked.
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/// </summary>
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public class WeightedAgentPool<TDecision>
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{
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private readonly List<(IAgent<TDecision> 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 void Add(IAgent<TDecision> agent, int weight)
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{
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_agents.Add((agent, weight));
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_totalWeight += weight;
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}
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public IAgent<TDecision> Pick()
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{
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if (_agents.Count == 0)
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throw new InvalidOperationException("WeightedAgentPool is empty");
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int roll = _rng.Next(_totalWeight);
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int cumulative = 0;
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foreach (var (agent, weight) in _agents)
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{
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cumulative += weight;
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if (roll < cumulative)
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return agent;
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}
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return _agents[^1].Agent;
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}
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}
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<RootNamespace>OECS.PlayTest</RootNamespace>
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<AssemblyName>OECS.PlayTest</AssemblyName>
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</PropertyGroup>
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<ItemGroup>
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<ProjectReference Include="..\OECS\OECS.csproj" />
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</ItemGroup>
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</Project>
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using OECS;
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using R3;
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namespace OECS.PlayTest;
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/// <summary>
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/// Captures all entity changes from the World's observable API and produces
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/// a compact text log on demand. Call <see cref="FormatWith{T}"/> to enrich
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/// component entries with human-readable values.
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/// </summary>
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public sealed class ObservableCapture : IDisposable
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{
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private readonly World _world;
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private readonly IDisposable _subscription;
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private readonly List<CapturedEvent> _events = new();
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private readonly Dictionary<Type, Func<World, Entity, string>> _formatters = new();
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public ObservableCapture(World world)
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{
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_world = world;
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_subscription = world.ObserveEntityChanges().Subscribe(OnChange);
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}
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/// <summary>
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/// Registers a formatter for component type <typeparamref name="T"/>.
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/// When a change for this type is captured, the formatted value is
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/// included in the log output.
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/// </summary>
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public void FormatWith<T>(Func<T, string> formatter) where T : struct
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{
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_formatters[typeof(T)] = (w, e) =>
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{
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var value = w.ReadComponent<T>(e);
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return formatter(value);
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};
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}
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/// <summary>
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/// Returns the captured log as a single string with one line per change.
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/// </summary>
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public string GetLog() => string.Join(Environment.NewLine, GetLogLines());
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/// <summary>
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/// Returns the captured log as a list of lines, one per change.
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/// </summary>
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public List<string> GetLogLines()
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{
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var lines = new List<string>(_events.Count);
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foreach (var evt in _events)
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{
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var change = evt.Change;
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var kind = change.Kind.ToString();
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if (change.ComponentType != null)
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{
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var typeName = change.ComponentType.Name;
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if (evt.FormattedValue != null)
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lines.Add($"{kind} {typeName} = {evt.FormattedValue} on {change.Entity}");
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else
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lines.Add($"{kind} {typeName} on {change.Entity}");
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}
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else
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{
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lines.Add($"{kind} on {change.Entity}");
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}
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}
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return lines;
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}
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public void Dispose() => _subscription.Dispose();
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private void OnChange(EntityChange change)
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{
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string? formattedValue = null;
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if (change.ComponentType != null
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&& change.Kind != ChangeKind.ComponentRemoved
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&& change.Kind != ChangeKind.EntityRemoved
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&& _formatters.TryGetValue(change.ComponentType, out var formatter))
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{
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formattedValue = formatter(_world, change.Entity);
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}
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_events.Add(new CapturedEvent(change, formattedValue));
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}
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private readonly struct CapturedEvent
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{
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public readonly EntityChange Change;
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public readonly string? FormattedValue;
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public CapturedEvent(EntityChange change, string? formattedValue)
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{
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Change = change;
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FormattedValue = formattedValue;
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}
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}
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}
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using System.Text;
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namespace OECS.PlayTest;
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/// <summary>
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/// Builds a sectioned play log with header, sections, and final snapshot,
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/// then saves it to a .playlog file.
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/// </summary>
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public class PlayLog
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{
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public string Header { get; set; } = "";
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public string FinalSnapshot { get; set; } = "";
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private readonly List<(string Title, List<string> Lines)> _sections = new();
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/// <summary>
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/// Adds a section with the given title and lines.
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/// </summary>
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public void AddSection(string title, IEnumerable<string> lines)
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{
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_sections.Add((title, lines.ToList()));
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}
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/// <summary>
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/// Builds the complete play log text.
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/// </summary>
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public string Build()
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{
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var sb = new StringBuilder();
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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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foreach (var (title, lines) in _sections)
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{
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sb.AppendLine($"--- {title} ---");
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foreach (var line in lines)
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sb.AppendLine($" {line}");
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sb.AppendLine();
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}
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sb.AppendLine("--- Final State ---");
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sb.AppendLine(FinalSnapshot);
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return sb.ToString();
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}
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/// <summary>
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/// Saves the play log to AppContext.BaseDirectory/playlogs/<paramref name="filename"/>
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/// and returns the full path.
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/// </summary>
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public string SaveTo(string filename)
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{
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var dir = Path.Combine(AppContext.BaseDirectory, "playlogs");
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Directory.CreateDirectory(dir);
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var path = Path.Combine(dir, filename);
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File.WriteAllText(path, Build());
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return path;
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}
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}
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23
OECS.sln
23
OECS.sln
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@ -1,4 +1,5 @@
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Microsoft Visual Studio Solution File, Format Version 12.00
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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.0.31903.59
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MinimumVisualStudioVersion = 10.0.40219.1
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@ -8,18 +9,20 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OECS.SourceGen", "OECS.Sour
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OECS.Tests", "OECS.Tests\OECS.Tests.csproj", "{B2C3D4E5-F6A7-8901-BCDE-F12345678901}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Game.Blackjack", "Game.Blackjack\Blackjack.csproj", "{85631EDE-F984-4DA6-8EE9-0715AF1204E6}"
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Blackjack", "Game.Blackjack\Blackjack.csproj", "{85631EDE-F984-4DA6-8EE9-0715AF1204E6}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Game.TicTacToe", "Game.TicTacToe\TicTacToe.csproj", "{D4E5F6A7-B8C9-0123-DEF4-567890ABCDEF}"
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TicTacToe", "Game.TicTacToe\TicTacToe.csproj", "{D4E5F6A7-B8C9-0123-DEF4-567890ABCDEF}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Game.Blackjack.Tests", "Game.Blackjack.Tests\Game.Blackjack.Tests.csproj", "{E5F6A7B8-C9D0-1234-EF56-7890ABCDEF01}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Game.TicTacToe.Tests", "Game.TicTacToe.Tests\Game.TicTacToe.Tests.csproj", "{F6A7B8C9-D0E1-2345-F678-90ABCDEF0123}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Game.CardWars", "Game.CardWars\CardWars.csproj", "{A1B2C3D4-E5F6-7890-ABCD-EF1234567891}"
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CardWars", "Game.CardWars\CardWars.csproj", "{A1B2C3D4-E5F6-7890-ABCD-EF1234567891}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Game.CardWars.Tests", "Game.CardWars.Tests\Game.CardWars.Tests.csproj", "{B2C3D4E5-F6A7-8901-BCDE-F12345678902}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OECS.PlayTest", "OECS.PlayTest\OECS.PlayTest.csproj", "{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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@ -138,6 +141,18 @@ Global
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{B2C3D4E5-F6A7-8901-BCDE-F12345678902}.Release|x64.Build.0 = Release|Any CPU
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{B2C3D4E5-F6A7-8901-BCDE-F12345678902}.Release|x86.ActiveCfg = Release|Any CPU
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{B2C3D4E5-F6A7-8901-BCDE-F12345678902}.Release|x86.Build.0 = Release|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Debug|x64.ActiveCfg = Debug|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Debug|x64.Build.0 = Debug|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Debug|x86.ActiveCfg = Debug|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Debug|x86.Build.0 = Debug|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Release|Any CPU.Build.0 = Release|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Release|x64.ActiveCfg = Release|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Release|x64.Build.0 = Release|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Release|x86.ActiveCfg = Release|Any CPU
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{ABF4060A-B8A2-49FC-9CEA-A54BCB3E315E}.Release|x86.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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