Joseph Doherty
95 lines
4.0 KiB
C#
95 lines
4.0 KiB
C#
using Shouldly;
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using Xunit;
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using ZB.MOM.WW.OtOpcUa.AdminUI.Hubs;
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using ZB.MOM.WW.OtOpcUa.Commons.Messages.Drivers;
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namespace ZB.MOM.WW.OtOpcUa.AdminUI.Tests;
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/// <summary>
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/// Covers the in-process push contract the Blazor Server <c>DriverStatusPanel</c> relies on:
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/// <see cref="IDriverStatusSnapshotStore.SnapshotChanged"/> fires on every
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/// <see cref="IDriverStatusSnapshotStore.Upsert"/>, and <c>TryGet</c> returns the latest.
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/// The panel subscribes to this store directly instead of opening a self-targeted SignalR
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/// connection (which a server-side component can't reach behind a reverse proxy).
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/// </summary>
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public sealed class DriverStatusSnapshotStoreTests
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{
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private static DriverHealthChanged Snap(string instance, string state = "Healthy") =>
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new("MAIN", instance, state, null, null, 0, new DateTime(2026, 5, 29, 0, 0, 0, DateTimeKind.Utc));
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[Fact]
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public void Upsert_raises_SnapshotChanged_with_the_stored_snapshot()
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{
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var store = new InMemoryDriverStatusSnapshotStore();
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var received = new List<DriverHealthChanged>();
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store.SnapshotChanged += received.Add;
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var snap = Snap("drv-1", "Faulted");
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store.Upsert(snap);
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received.Count.ShouldBe(1);
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received[0].ShouldBeSameAs(snap);
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}
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[Fact]
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public void Upsert_then_TryGet_returns_the_latest_snapshot()
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{
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var store = new InMemoryDriverStatusSnapshotStore();
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store.Upsert(Snap("drv-1", "Healthy"));
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store.Upsert(Snap("drv-1", "Degraded"));
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store.TryGet("drv-1", out var latest).ShouldBeTrue();
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latest.State.ShouldBe("Degraded");
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}
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[Fact]
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public void Unsubscribed_handler_stops_receiving_after_removal()
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{
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var store = new InMemoryDriverStatusSnapshotStore();
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var count = 0;
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void Handler(DriverHealthChanged _) => count++;
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store.SnapshotChanged += Handler;
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store.Upsert(Snap("drv-1"));
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store.SnapshotChanged -= Handler;
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store.Upsert(Snap("drv-1"));
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count.ShouldBe(1);
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}
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[Fact]
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public void Snapshots_from_two_nodes_for_one_driver_are_kept_side_by_side_847()
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{
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var store = new InMemoryDriverStatusSnapshotStore();
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var t0 = new DateTime(2026, 11, 11, 0, 0, 0, DateTimeKind.Utc);
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store.Upsert(new DriverHealthChanged("MAIN", "drv", "Faulted", null, "x", 1, t0, ReportingNodeId: "central-1"));
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store.Upsert(new DriverHealthChanged("MAIN", "drv", "Healthy", null, null, 0, t0.AddSeconds(1), ReportingNodeId: "central-2"));
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// A re-publish from central-1 replaces only central-1's entry.
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store.Upsert(new DriverHealthChanged("MAIN", "drv", "Faulted", null, "y", 2, t0.AddSeconds(2), ReportingNodeId: "central-1"));
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var all = store.GetAll();
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all.Count.ShouldBe(2);
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all.Single(s => s.ReportingNodeId == "central-1").LastError.ShouldBe("y");
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all.Single(s => s.ReportingNodeId == "central-2").State.ShouldBe("Healthy");
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// TryGet (the per-driver panel / hub) answers the most recently published across nodes.
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store.TryGet("drv", out var latest).ShouldBeTrue();
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latest.ReportingNodeId.ShouldBe("central-1");
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latest.LastError.ShouldBe("y");
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store.TryGet("other", out _).ShouldBeFalse();
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}
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[Fact]
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public void Eviction_removes_every_node_entry_of_an_unconfigured_stale_driver_847()
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{
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var store = new InMemoryDriverStatusSnapshotStore();
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var old = new DateTime(2026, 1, 1, 0, 0, 0, DateTimeKind.Utc);
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store.Upsert(new DriverHealthChanged("MAIN", "gone", "Healthy", null, null, 0, old, ReportingNodeId: "a"));
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store.Upsert(new DriverHealthChanged("MAIN", "gone", "Healthy", null, null, 0, old, ReportingNodeId: "b"));
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store.Upsert(new DriverHealthChanged("MAIN", "kept", "Healthy", null, null, 0, old, ReportingNodeId: "a"));
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store.EvictUnconfiguredStale(new HashSet<string> { "kept" }, old.AddMinutes(1)).ShouldBe(2);
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store.GetAll().ShouldHaveSingleItem().DriverInstanceId.ShouldBe("kept");
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}
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}
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