DeviceHub: wake → session lifecycle + uplink relay + tool_result routing

backend.tests/ApiFactory.cs

@@ -1,7 +1,11 @@
+using backend.Realtime;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.AspNetCore.TestHost;
 using Microsoft.Data.Sqlite;
 using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
 
 namespace backend.tests;
 
@@ -17,8 +21,14 @@ public class ApiFactory : WebApplicationFactory<Program>
             cfg.AddInMemoryCollection(new Dictionary<string, string?>
             {
                 ["ConnectionStrings:Default"] = $"Data Source={_dbPath}",
+                ["OPENAI_API_KEY"] = "test-key",
             });
         });
+
+        builder.ConfigureTestServices(services =>
+        {
+            services.AddScoped<RealtimeSessionFactory, FakeRealtimeSessionFactory>();
+        });
     }
 
     protected override void Dispose(bool disposing)
@@ -32,3 +42,24 @@ public class ApiFactory : WebApplicationFactory<Program>
         }
     }
 }
+
+public class FakeRealtimeSessionFactory(
+    OpenAIKeyProvider keys,
+    backend.Tools.ToolRegistry registry,
+    backend.Conversations.ConversationLog log,
+    ILoggerFactory loggerFactory)
+    : RealtimeSessionFactory(keys, registry, log, loggerFactory)
+{
+    public static ScriptedRealtimeUpstream Upstream { get; set; } = new();
+
+    public override Task<RealtimeSession> CreateAsync(
+        Guid deviceId, RealtimeSettings cfg, ISessionOutput output,
+        backend.Tools.IDeviceChannel channel, CancellationToken ct)
+    {
+        Upstream.Push(new System.Text.Json.Nodes.JsonObject { ["type"] = "session.updated" });
+        var s = new RealtimeSession(
+            deviceId, Upstream, output, log, registry, cfg, channel,
+            loggerFactory.CreateLogger<RealtimeSession>());
+        return Task.FromResult(s);
+    }
+}