feat(plugins): complete Campaign LA5 cross-host hosting

tests/AcDream.App.Tests/Plugins/GraphicalPluginSessionTests.cs

@@ -0,0 +1,202 @@
+using System.Text.Json;
+using System.Runtime.CompilerServices;
+using AcDream.App.Plugins;
+using AcDream.Core.Plugins;
+using AcDream.Core.Selection;
+using AcDream.Platform;
+using AcDream.Plugin.Abstractions;
+using AcDream.Runtime.Session;
+
+namespace AcDream.App.Tests.Plugins;
+
+public sealed class GraphicalPluginSessionTests
+{
+    private const string FixtureId = "acdream.test.host-fixture";
+
+    [Fact]
+    public void ConfiguredSetLoadsOnlyAllowedPluginAndReportsBothOutcomes()
+    {
+        using var temporary = new TemporaryDirectory();
+        ApplicationPathSet paths = Paths(temporary.Path);
+        InstallFixture(paths.PluginsDirectory, FixtureId);
+        string statusPath = Path.Combine(temporary.Path, "status.jsonl");
+        var logger = new CapturingLogger();
+        var state = new WorldGameState();
+        var events = new WorldEvents();
+        var selection = new SelectionState();
+        var ui = new BufferedUiRegistry();
+        var host = new AppPluginHost(logger, state, events, selection, ui);
+
+        using GraphicalPluginSession plugins = GraphicalPluginSession.Start(
+            paths,
+            [FixtureId.ToUpperInvariant(), "acdream.test.missing"],
+            "gui-session",
+            host,
+            new SessionStatusWriter(statusPath));
+
+        Assert.Equal(1, plugins.LoadedCount);
+        Assert.True(host.HasUi);
+        AssertPanelWasRegisteredAndReleaseBinding(ui);
+        Assert.Contains(
+            logger.Messages,
+            message => message.Contains("fixture-enabled:hasUi=True", StringComparison.Ordinal));
+
+        JsonElement[] statuses = ReadStatuses(statusPath);
+        Assert.Equal(["pluginLoaded", "pluginFailed"], EventNames(statuses));
+        Assert.Equal(FixtureId, statuses[0].GetProperty("plugin").GetString());
+        Assert.Equal(
+            "acdream.test.missing",
+            statuses[1].GetProperty("plugin").GetString());
+        Assert.Contains(
+            "not found",
+            statuses[1].GetProperty("error").GetString(),
+            StringComparison.OrdinalIgnoreCase);
+
+        WeakReference context = Assert.Single(
+            plugins.CaptureLoadContextWeakReferences());
+        plugins.Dispose();
+        Collect(context);
+        Assert.False(context.IsAlive);
+    }
+
+    [Fact]
+    public void ExplicitEmptyConfiguredSetLoadsNone()
+    {
+        using var temporary = new TemporaryDirectory();
+        ApplicationPathSet paths = Paths(temporary.Path);
+        InstallFixture(paths.PluginsDirectory, FixtureId);
+        string statusPath = Path.Combine(temporary.Path, "status.jsonl");
+        var ui = new BufferedUiRegistry();
+        var host = new AppPluginHost(
+            new CapturingLogger(),
+            new WorldGameState(),
+            new WorldEvents(),
+            new SelectionState(),
+            ui);
+
+        using GraphicalPluginSession plugins = GraphicalPluginSession.Start(
+            paths,
+            [],
+            "gui-session",
+            host,
+            new SessionStatusWriter(statusPath));
+
+        Assert.Equal(0, plugins.LoadedCount);
+        Assert.Empty(ui.Drain());
+        Assert.False(File.Exists(statusPath));
+    }
+
+    private static ApplicationPathSet Paths(string root) => new(
+        Path.Combine(root, "config"),
+        Path.Combine(root, "data"),
+        Path.Combine(root, "cache"),
+        LegacyConfigDirectory: null);
+
+    [MethodImpl(MethodImplOptions.NoInlining)]
+    private static void AssertPanelWasRegisteredAndReleaseBinding(
+        BufferedUiRegistry ui)
+    {
+        BufferedUiRegistry.Pending panel = Assert.Single(ui.Drain());
+        Assert.EndsWith(
+            "fixture-panel.xml",
+            panel.MarkupPath,
+            StringComparison.Ordinal);
+        Assert.Equal(
+            "AcDream.Plugin.Tests.Fixtures.HostPlugin",
+            panel.Binding.GetType().Assembly.GetName().Name);
+    }
+
+    private static JsonElement[] ReadStatuses(string path) =>
+        File.ReadAllLines(path)
+            .Select(static line => JsonDocument.Parse(line).RootElement.Clone())
+            .ToArray();
+
+    private static string[] EventNames(IEnumerable<JsonElement> events) =>
+        events.Select(static item => item.GetProperty("e").GetString()!).ToArray();
+
+    private static void InstallFixture(string root, string id)
+    {
+        string source = FixtureAssemblyPath();
+        Assert.True(File.Exists(source), $"fixture DLL not found: {source}");
+        string pluginDirectory = Path.Combine(root, "host-fixture");
+        Directory.CreateDirectory(pluginDirectory);
+        string fileName = Path.GetFileName(source);
+        File.Copy(source, Path.Combine(pluginDirectory, fileName));
+        File.WriteAllText(
+            Path.Combine(pluginDirectory, "plugin.json"),
+            JsonSerializer.Serialize(new
+            {
+                id,
+                displayName = "Host fixture",
+                version = "1.0.0",
+                entryDll = fileName,
+                apiVersion = 1,
+            }));
+    }
+
+    private static string FixtureAssemblyPath()
+    {
+        string configuration = new DirectoryInfo(AppContext.BaseDirectory)
+            .Parent!.Name;
+        string root = FindRepoRoot(AppContext.BaseDirectory);
+        return Path.Combine(
+            root,
+            "tests",
+            "AcDream.Plugin.Tests.Fixtures.HostPlugin",
+            "bin",
+            configuration,
+            "net10.0",
+            "AcDream.Plugin.Tests.Fixtures.HostPlugin.dll");
+    }
+
+    private static string FindRepoRoot(string start)
+    {
+        DirectoryInfo? directory = new(start);
+        while (directory is not null
+            && !File.Exists(Path.Combine(directory.FullName, "AcDream.slnx")))
+        {
+            directory = directory.Parent;
+        }
+        return directory?.FullName
+            ?? throw new InvalidOperationException("Repository root not found.");
+    }
+
+    private static void Collect(WeakReference reference)
+    {
+        for (int attempt = 0; attempt < 10 && reference.IsAlive; attempt++)
+        {
+            GC.Collect();
+            GC.WaitForPendingFinalizers();
+            GC.Collect();
+        }
+    }
+
+    private sealed class CapturingLogger : IPluginLogger
+    {
+        internal List<string> Messages { get; } = [];
+
+        public void Info(string message) => Messages.Add(message);
+        public void Warn(string message) => Messages.Add(message);
+        public void Error(string message, Exception? exception = null) =>
+            Messages.Add(exception is null ? message : $"{message}: {exception.Message}");
+    }
+
+    private sealed class TemporaryDirectory : IDisposable
+    {
+        internal TemporaryDirectory()
+        {
+            Path = System.IO.Path.Combine(
+                System.IO.Path.GetTempPath(),
+                $"acdream-graphical-plugins-{Guid.NewGuid():N}");
+            Directory.CreateDirectory(Path);
+        }
+
+        internal string Path { get; }
+
+        public void Dispose()
+        {
+            if (Directory.Exists(Path))
+                Directory.Delete(Path, recursive: true);
+        }
+    }
+}