Initial

tests/ClaudeMailbox.Tests/TestHost.cs

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+using ClaudeMailbox;
+using ClaudeMailbox.Config;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+
+namespace ClaudeMailbox.Tests;
+
+/// <summary>
+/// Spins up a full ClaudeMailbox WebApplication on an ephemeral port against a temp SQLite file.
+/// Disposable — removes the DB and stops the host on dispose.
+/// </summary>
+public sealed class TestHost : IAsyncDisposable
+{
+    private readonly WebApplication _app;
+    private readonly string _dbPath;
+
+    public HttpClient Client { get; }
+    public string BaseUrl { get; }
+    public string DbPath => _dbPath;
+
+    private TestHost(WebApplication app, string dbPath, string baseUrl)
+    {
+        _app = app;
+        _dbPath = dbPath;
+        BaseUrl = baseUrl;
+        Client = new HttpClient { BaseAddress = new Uri(baseUrl) };
+    }
+
+    public static async Task<TestHost> StartAsync()
+    {
+        var dbPath = Path.Combine(Path.GetTempPath(), $"claude-mailbox-test-{Guid.NewGuid():N}.db");
+        var cfg = new DaemonConfig
+        {
+            Port = 0,
+            BindAddress = "127.0.0.1",
+            DbPath = dbPath,
+        };
+
+        var builder = ServerHost.CreateBuilder(cfg);
+        builder.WebHost.UseUrls("http://127.0.0.1:0");
+
+        var app = builder.Build();
+        ServerHost.ConfigurePipeline(app);
+
+        await app.StartAsync();
+
+        // Discover the port Kestrel picked.
+        var server = app.Services.GetRequiredService<Microsoft.AspNetCore.Hosting.Server.IServer>();
+        var feature = server.Features.Get<Microsoft.AspNetCore.Hosting.Server.Features.IServerAddressesFeature>();
+        var url = feature?.Addresses.FirstOrDefault()
+            ?? throw new InvalidOperationException("No bound URL after start.");
+
+        return new TestHost(app, dbPath, url);
+    }
+
+    public HttpClient NewClientFor(string mailboxName)
+    {
+        var c = new HttpClient { BaseAddress = new Uri(BaseUrl) };
+        c.DefaultRequestHeaders.Add("X-Mailbox", mailboxName);
+        return c;
+    }
+
+    public async ValueTask DisposeAsync()
+    {
+        Client.Dispose();
+        await _app.StopAsync();
+        await _app.DisposeAsync();
+
+        // Allow SQLite handle to release before deleting.
+        GC.Collect();
+        GC.WaitForPendingFinalizers();
+
+        foreach (var ext in new[] { "", "-wal", "-shm" })
+        {
+            var path = _dbPath + ext;
+            if (File.Exists(path))
+            {
+                try { File.Delete(path); } catch { /* best-effort cleanup */ }
+            }
+        }
+    }
+}