Joseph Doherty
60 lines
2.6 KiB
C#
60 lines
2.6 KiB
C#
using Serilog;
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using Serilog.Core;
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using Serilog.Events;
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using Shouldly;
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using Xunit;
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using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
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using ZB.MOM.WW.OtOpcUa.Core.Scripting;
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namespace ZB.MOM.WW.OtOpcUa.Core.ScriptedAlarms.Tests;
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/// <summary>Review R05:6 — a throwing <see cref="ScriptedAlarmSource.OnAlarmEvent"/> subscriber used to be
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/// swallowed with no diagnostic: a lost alarm event with no trace. It is now logged at Warning.</summary>
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[Trait("Category", "Unit")]
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public sealed class ScriptedAlarmSourceLoggingTests
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{
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private sealed class CapturingSink : ILogEventSink
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{
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public List<LogEvent> Events { get; } = [];
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public void Emit(LogEvent logEvent) { lock (Events) Events.Add(logEvent); }
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}
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[Fact]
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public async Task A_throwing_subscriber_is_logged_at_Warning_and_does_not_crash_the_adapter()
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{
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var sinkCapture = new CapturingSink();
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var logger = new LoggerConfiguration().MinimumLevel.Verbose().WriteTo.Sink(sinkCapture).CreateLogger();
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var up = new FakeUpstream();
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up.Set("Temp", 50);
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var engine = new ScriptedAlarmEngine(up, new InMemoryAlarmStateStore(), new ScriptLoggerFactory(logger), logger);
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await engine.LoadAsync(
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[new ScriptedAlarmDefinition("Plant/Line1::HighTemp", "Plant/Line1", "HighTemp", AlarmKind.LimitAlarm,
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AlarmSeverity.High, "Temp {Temp}C", """return (int)ctx.GetTag("Temp").Value > 100;""")],
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TestContext.Current.CancellationToken);
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using var _e = engine;
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using var source = new ScriptedAlarmSource(engine, logger);
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await source.SubscribeAlarmsAsync(Array.Empty<string>(), TestContext.Current.CancellationToken);
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source.OnAlarmEvent += (_, _) => throw new InvalidOperationException("subscriber broke");
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up.Push("Temp", 150);
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var deadline = DateTime.UtcNow.AddSeconds(10);
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while (DateTime.UtcNow < deadline)
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{
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lock (sinkCapture.Events)
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{
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if (sinkCapture.Events.Any(e => e.Level == LogEventLevel.Warning && e.Exception?.Message == "subscriber broke"))
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break;
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}
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await Task.Delay(25, TestContext.Current.CancellationToken);
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}
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LogEvent warning;
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lock (sinkCapture.Events)
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warning = sinkCapture.Events.Single(e => e.Level == LogEventLevel.Warning && e.Exception?.Message == "subscriber broke");
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warning.RenderMessage().ShouldContain("Plant/Line1::HighTemp");
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// The adapter survived: the engine's state still moved.
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engine.GetState("Plant/Line1::HighTemp")!.Active.ShouldBe(AlarmActiveState.Active);
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}
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}
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