Joseph Doherty
101 lines
4.0 KiB
C#
101 lines
4.0 KiB
C#
using ZB.MOM.WW.ScadaBridge.Commons.Messages.Health;
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using ZB.MOM.WW.ScadaBridge.Commons.Types;
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using ZB.MOM.WW.ScadaBridge.Commons.Types.Enums;
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using ZB.MOM.WW.ScadaBridge.HealthMonitoring.Kpi;
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namespace ZB.MOM.WW.ScadaBridge.HealthMonitoring.Tests.Kpi;
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/// <summary>
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/// Task 10 (arch-review 04) coverage for <see cref="CentralHealthAuditBacklogProvider"/>.
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/// The provider sums the latest per-site <c>SiteAuditBacklog.PendingCount</c> across the
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/// in-memory <see cref="ICentralHealthAggregator"/> — the same aggregate the live Audit
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/// backlog tile shows — so the <c>backlogTotal</c> KPI history stops recording a hardwired
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/// zero. Sites with no report or a null backlog snapshot contribute nothing.
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/// </summary>
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public class CentralHealthAuditBacklogProviderTests
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{
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private static readonly DateTime At = new(2026, 6, 17, 12, 0, 0, DateTimeKind.Utc);
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[Fact]
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public void GetPendingBacklogTotal_Sums_PendingCount_Across_Sites()
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{
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var aggregator = new StubAggregator
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{
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States =
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{
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["site-a"] = StateWithBacklog("site-a", 9),
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["site-b"] = StateWithBacklog("site-b", 4),
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["site-c"] = new SiteHealthState { SiteId = "site-c", LatestReport = null }, // heartbeat-only
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},
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};
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var provider = new CentralHealthAuditBacklogProvider(aggregator);
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// 9 + 4; the null-report site contributes nothing.
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Assert.Equal(13, provider.GetPendingBacklogTotal());
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}
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[Fact]
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public void GetPendingBacklogTotal_Returns_Zero_When_No_Backlog_Reported()
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{
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var aggregator = new StubAggregator
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{
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States =
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{
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["site-a"] = new SiteHealthState { SiteId = "site-a", LatestReport = MinimalReport("site-a") with { SiteAuditBacklog = null } },
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["site-b"] = new SiteHealthState { SiteId = "site-b", LatestReport = null },
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},
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};
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var provider = new CentralHealthAuditBacklogProvider(aggregator);
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Assert.Equal(0, provider.GetPendingBacklogTotal());
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}
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private static SiteHealthState StateWithBacklog(string siteId, int pending) =>
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new()
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{
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SiteId = siteId,
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LatestReport = MinimalReport(siteId) with
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{
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SiteAuditBacklog = new SiteAuditBacklogSnapshot(
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PendingCount: pending, OldestPendingUtc: null, OnDiskBytes: 0),
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},
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};
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private static SiteHealthReport MinimalReport(string siteId) =>
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new(
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SiteId: siteId,
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SequenceNumber: 1,
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ReportTimestamp: At,
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DataConnectionStatuses: new Dictionary<string, ConnectionHealth>(),
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TagResolutionCounts: new Dictionary<string, TagResolutionStatus>(),
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ScriptErrorCount: 0,
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AlarmEvaluationErrorCount: 0,
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StoreAndForwardBufferDepths: new Dictionary<string, int>(),
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DeadLetterCount: 0,
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DeployedInstanceCount: 0,
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EnabledInstanceCount: 0,
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DisabledInstanceCount: 0);
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/// <summary>
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/// Hand-rolled <see cref="ICentralHealthAggregator"/> stub — the HealthMonitoring.Tests
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/// project has no mocking library. Only <see cref="GetAllSiteStates"/> is exercised.
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/// </summary>
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private sealed class StubAggregator : ICentralHealthAggregator
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{
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public Dictionary<string, SiteHealthState> States { get; } = new();
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public IReadOnlyDictionary<string, SiteHealthState> GetAllSiteStates() => States;
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public SiteHealthState? GetSiteState(string siteId) =>
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States.TryGetValue(siteId, out var state) ? state : null;
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public void ProcessReport(SiteHealthReport report) => throw new NotSupportedException();
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public void MarkHeartbeat(string siteId, DateTimeOffset receivedAt) => throw new NotSupportedException();
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public void PruneUnknownSites(IReadOnlyCollection<string> knownSiteIds) => throw new NotSupportedException();
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}
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}
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