feat(core): add IBatchSubscribable batch data-change contract

2026-08-15 12:06:53 -04:00
parent 477cb10ff2
commit b857df8a12
2 changed files with 53 additions and 0 deletions
@@ -0,0 +1,27 @@
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
+
+namespace ZB.MOM.WW.OtOpcUa.Core.Tests;
+
+/// <summary>Contract tests for the batched data-change payload types.</summary>
+[Trait("Category", "Unit")]
+public sealed class DataChangeBatchContractTests
+{
+    private sealed record FakeHandle(string DiagnosticId) : ISubscriptionHandle;
+
+    /// <summary>Verifies the batch payload carries the subscription handle and its per-tag items.</summary>
+    [Fact]
+    public void Batch_args_carry_handle_and_items()
+    {
+        var handle = new FakeHandle("h1");
+        var snap = new DataValueSnapshot(42, 0u, DateTime.UtcNow, DateTime.UtcNow);
+
+        var args = new DataChangeBatchEventArgs(handle, new[] { new DataChangeItem("plc/tag1", snap) });
+
+        args.SubscriptionHandle.ShouldBe(handle);
+        args.Items.Count.ShouldBe(1);
+        args.Items[0].FullReference.ShouldBe("plc/tag1");
+        args.Items[0].Snapshot.ShouldBe(snap);
+    }
+}