feat(controlplane): ServiceLevelCalculator + ControlPlane.Tests harness

tests/Server/ZB.MOM.WW.OtOpcUa.ControlPlane.Tests/Harness/ControlPlaneTestHarness.cs

@@ -0,0 +1,54 @@
+using Akka.TestKit.Xunit2;
+using Microsoft.EntityFrameworkCore;
+using ZB.MOM.WW.OtOpcUa.Configuration;
+
+namespace ZB.MOM.WW.OtOpcUa.ControlPlane.Tests.Harness;
+
+/// <summary>
+/// Akka TestKit fixture for ControlPlane actor tests. Provides:
+/// - A test ActorSystem (xunit2 TestKit) wired with PubSub/Cluster extensions.
+/// - A fresh in-memory <see cref="OtOpcUaConfigDbContext"/> per harness instance.
+/// - An <see cref="IDbContextFactory{TContext}"/> the actors can hold.
+///
+/// One harness per test fact — InMemory provider gives strong isolation when the database
+/// name is unique (random Guid).
+/// </summary>
+public abstract class ControlPlaneActorTestBase : TestKit
+{
+    protected static string AkkaTestHocon => @"
+akka {
+    loglevel = ""WARNING""
+    actor {
+        provider = ""Akka.Cluster.ClusterActorRefProvider, Akka.Cluster""
+    }
+    remote.dot-netty.tcp {
+        hostname = ""127.0.0.1""
+        port = 0
+    }
+    cluster {
+        seed-nodes = []
+        roles = [""admin""]
+        min-nr-of-members = 1
+        run-coordinated-shutdown-when-down = off
+    }
+}";
+
+    protected ControlPlaneActorTestBase() : base(AkkaTestHocon) { }
+
+    protected static IDbContextFactory<OtOpcUaConfigDbContext> NewInMemoryDbFactory(string? dbName = null)
+    {
+        dbName ??= Guid.NewGuid().ToString("N");
+        return new InMemoryConfigDbFactory(dbName);
+    }
+
+    private sealed class InMemoryConfigDbFactory(string dbName) : IDbContextFactory<OtOpcUaConfigDbContext>
+    {
+        public OtOpcUaConfigDbContext CreateDbContext()
+        {
+            var opts = new DbContextOptionsBuilder<OtOpcUaConfigDbContext>()
+                .UseInMemoryDatabase(dbName)
+                .Options;
+            return new OtOpcUaConfigDbContext(opts);
+        }
+    }
+}