Joseph Doherty
96ec751a0b
The DroppedUnsupportedKind counter still counts every value; only the Debug line is latched (cleared by the next captured value), so a Gateway-backend comms loss no longer logs one line per tag. Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe
59 lines
2.6 KiB
C#
59 lines
2.6 KiB
C#
using System.Diagnostics.Metrics;
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using Shouldly;
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using Xunit;
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using ZB.MOM.WW.OtOpcUa.Commons.Observability;
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using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
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using ZB.MOM.WW.OtOpcUa.Runtime.Historian;
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namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.Historian;
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/// <summary>
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/// The <c>otopcua.historian.outbox.unreadable</c> gauge reports the bound outbox's
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/// <see cref="IHistorizationOutbox.UnreadableCount"/>. The listener is filtered by the instrument INSTANCE (the
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/// shared <see cref="OtOpcUaTelemetry.Meter"/> object plus the instrument name), never by meter name alone, so a
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/// parallel test's measurements on another meter of the same name cannot reach it; and the bound outbox reports a
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/// distinctive count, so the asserted value can only have come from this test's outbox.
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/// </summary>
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public sealed class ContinuousHistorizationMetricsTests
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{
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private const string GaugeName = "otopcua.historian.outbox.unreadable";
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[Fact]
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public void The_unreadable_gauge_reports_the_bound_outboxs_unreadable_count()
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{
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const long distinctive = 7_331_919L;
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ContinuousHistorizationMetrics.BindOutbox(new UnreadableOutbox(distinctive));
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var observed = new List<long>();
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using var listener = new MeterListener
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{
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InstrumentPublished = (instrument, l) =>
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{
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if (ReferenceEquals(instrument.Meter, OtOpcUaTelemetry.Meter) && instrument.Name == GaugeName)
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l.EnableMeasurementEvents(instrument);
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},
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};
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listener.SetMeasurementEventCallback<long>((instrument, value, _, _) =>
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{
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if (instrument.Name == GaugeName) observed.Add(value);
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});
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listener.Start();
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listener.RecordObservableInstruments();
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observed.ShouldBe([distinctive]);
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}
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private sealed class UnreadableOutbox(long unreadable) : IHistorizationOutbox
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{
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public long DroppedCount => 0;
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public long UnreadableCount => unreadable;
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public ValueTask AppendAsync(HistorizationOutboxEntry entry, CancellationToken ct) => ValueTask.CompletedTask;
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public ValueTask AppendBatchAsync(IReadOnlyList<HistorizationOutboxEntry> entries, CancellationToken ct) => ValueTask.CompletedTask;
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public ValueTask<IReadOnlyList<HistorizationOutboxEntry>> PeekBatchAsync(int max, CancellationToken ct) =>
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ValueTask.FromResult<IReadOnlyList<HistorizationOutboxEntry>>([]);
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public ValueTask RemoveAsync(Guid id, CancellationToken ct) => ValueTask.CompletedTask;
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public ValueTask<int> CountAsync(CancellationToken ct) => ValueTask.FromResult(0);
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public void Dispose() { }
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}
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}
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