feat(historian-gateway): alarm-write cutover — AddAlarmHistorian drains to GatewayAlarmHistorianWriter

Claude-Session: https://claude.ai/code/session_012SDSQ3AcaXqPcBtDESBRii
2026-06-26 17:40:23 -04:00
parent 8559905e8a
commit 0be79219fc
3 changed files with 87 additions and 15 deletions
@@ -0,0 +1,28 @@
+using Microsoft.Extensions.DependencyInjection;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Core.AlarmHistorian;
+using ZB.MOM.WW.OtOpcUa.Runtime.Historian;
+
+namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Gateway.Tests;
+
+/// <summary>
+/// Alarm-write cutover seam test (T13). The Host's <c>AddAlarmHistorian</c> wiring drains the durable
+/// <c>SqliteStoreAndForwardSink</c> through this factory, so it must yield the gateway-backed writer —
+/// sourcing the single gateway's connection from <see cref="ServerHistorianOptions"/> (endpoint/key/TLS),
+/// not the legacy Wonderware-shaped <c>AlarmHistorian</c> host/port. Built offline: the underlying
+/// channel dials lazily, so both the factory and the writer ctor perform no network I/O (a bogus,
+/// unreachable endpoint must construct without throwing or connecting).
+/// </summary>
+public sealed class GatewayAlarmWriterFactoryTests
+{
+    [Fact]
+    public void Factory_builds_GatewayAlarmHistorianWriter()
+    {
+        var opts = new ServerHistorianOptions { Enabled = true, Endpoint = "https://localhost:5222", ApiKey = "histgw_x_y" };
+        using var services = new ServiceCollection().BuildServiceProvider();
+
+        IAlarmHistorianWriter writer = GatewayHistorian.CreateAlarmWriter(opts, services);
+
+        Assert.IsType<GatewayAlarmHistorianWriter>(writer);
+    }
+}