fix(r2-10): periodic DPS publisher for tracker snapshots

2026-07-13 10:40:54 -04:00
parent 2cb3f962b9
commit 37f180c5a3
3 changed files with 150 additions and 1 deletions
@@ -0,0 +1,56 @@
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Core.Resilience;
+using ZB.MOM.WW.OtOpcUa.Host.Drivers;
+
+namespace ZB.MOM.WW.OtOpcUa.Host.IntegrationTests;
+
+/// <summary>
+///     Pure-DI (no fixture) coverage of the publisher's snapshot→message mapping — the only unit-testable
+///     seam of <see cref="DriverResilienceStatusPublisherService"/>. The DPS <c>Publish</c> shell is
+///     verified by the R2-10 live gate; this asserts the mapping the shell publishes.
+/// </summary>
+public sealed class DriverResilienceStatusPublisherServiceTests
+{
+    private static readonly DateTime Published = new(2026, 7, 13, 9, 0, 0, DateTimeKind.Utc);
+    private static readonly DateTime Sampled = new(2026, 7, 13, 8, 59, 0, DateTimeKind.Utc);
+
+    [Fact]
+    public void BuildMessages_EmptyTracker_ReturnsEmpty()
+    {
+        var tracker = new DriverResilienceStatusTracker();
+
+        var messages = DriverResilienceStatusPublisherService.BuildMessages(tracker, Published);
+
+        messages.ShouldBeEmpty();
+    }
+
+    [Fact]
+    public void BuildMessages_MapsTrackerSnapshot_OneMessagePerInstanceHost()
+    {
+        var tracker = new DriverResilienceStatusTracker();
+        // (drv-1, host-a): an open breaker with a standing failure count.
+        tracker.RecordFailure("drv-1", "host-a", Sampled);
+        tracker.RecordFailure("drv-1", "host-a", Sampled);
+        tracker.RecordBreakerOpen("drv-1", "host-a", Sampled);
+        // (drv-1, host-b): a healthy host with in-flight calls.
+        tracker.RecordCallStart("drv-1", "host-b");
+
+        var messages = DriverResilienceStatusPublisherService.BuildMessages(tracker, Published);
+
+        messages.Count.ShouldBe(2);
+
+        var open = messages.Single(m => m.HostName == "host-a");
+        open.DriverInstanceId.ShouldBe("drv-1");
+        open.BreakerOpen.ShouldBeTrue();
+        open.ConsecutiveFailures.ShouldBe(2);
+        open.LastBreakerOpenUtc.ShouldBe(Sampled);
+        open.PublishedUtc.ShouldBe(Published);
+
+        var healthy = messages.Single(m => m.HostName == "host-b");
+        healthy.BreakerOpen.ShouldBeFalse();
+        healthy.ConsecutiveFailures.ShouldBe(0);
+        healthy.CurrentInFlight.ShouldBe(1);
+        healthy.PublishedUtc.ShouldBe(Published);
+    }
+}