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test(historian-sidecar): complete PR C.1 test coverage for AahClientManagedAlarmEventWriter

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Add the spec-required 100/1000-event batching tests and cluster-failover
tests that were missing from the existing C.1 suite:

- AahClientManagedAlarmEventWriterTests: add Large_batch_all_ack_returns_all_true
  (batchSize 100 + 1000) and Large_batch_alternating_outcomes_are_positionally_correct
  (batchSize 100 + 1000) to satisfy the "1 / 100 / 1000 events" spec requirement;
  add Backend_retry_then_succeed_simulates_cluster_failover to cover the
  RetryPlease-then-Ack sequence at the IPC layer (unit-level stand-in for the
  rig-gated live cluster-failover path).

- SdkAlarmHistorianWriteBackendTests (new file): unit tests that pin the
  placeholder backend's RetryPlease-for-every-slot contract (preserves queued
  events while D.1 is unresolved); plus two Skip("rig-required") integration
  tests covering the live SDK single-event roundtrip and cluster failover via
  HistorianClusterEndpointPicker — remove the Skip in PR D.1.

Feasibility note: aahClientManaged.dll IS present in lib/ and referenced in
the csproj; the SDK call site is isolated behind IAlarmHistorianWriteBackend
in SdkAlarmHistorianWriteBackend.WriteBatchAsync (single method, D.1 seam).
The full AahClientManagedAlarmEventWriter implementation was already complete.

Build: 0 errors, 0 warnings.
Tests: 64 passed, 2 skipped (rig-gated), 0 failed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Joseph Doherty
2026-05-18 06:25:11 -04:00
parent fea2b34e9a
commit 8a51842e89
2 changed files with 250 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

86
tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Tests/Backend/AahClientManagedAlarmEventWriterTests.cs
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@@ -108,6 +108,92 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Host.Tests
result.ShouldBe(new[] { false });
}
[Theory]
[InlineData(100)]
[InlineData(1000)]
public async Task Large_batch_all_ack_returns_all_true(int batchSize)
{
// Spec: "1 / 100 / 1000 events through a fake aahClientManaged writer;
// assert per-row outcome list parallel to input order."
var backend = new RecordingBackend(events => events.Select(_ => AlarmHistorianWriteOutcome.Ack).ToArray());
var writer = new AahClientManagedAlarmEventWriter(backend);
var batch = Enumerable.Range(0, batchSize)
.Select(i => Event($"E{i}"))
.ToArray();
var result = await writer.WriteAsync(batch, CancellationToken.None);
result.Length.ShouldBe(batchSize);
result.ShouldAllBe(ok => ok);
backend.Calls.ShouldBe(1);
}
[Theory]
[InlineData(100)]
[InlineData(1000)]
public async Task Large_batch_alternating_outcomes_are_positionally_correct(int batchSize)
{
// Verifies that per-row outcome ordering is preserved for large batches;
// a backend that returns the outcomes in a different allocation order would
// fail this test if the writer incorrectly indexing outcomes.
var backend = new RecordingBackend(events =>
events.Select((_, i) => i % 2 == 0
? AlarmHistorianWriteOutcome.Ack
: AlarmHistorianWriteOutcome.RetryPlease).ToArray());
var writer = new AahClientManagedAlarmEventWriter(backend);
var batch = Enumerable.Range(0, batchSize).Select(i => Event($"E{i}")).ToArray();
var result = await writer.WriteAsync(batch, CancellationToken.None);
result.Length.ShouldBe(batchSize);
for (var i = 0; i < result.Length; i++)
{
var expected = i % 2 == 0;
result[i].ShouldBe(expected, $"slot {i}: expected {expected}");
}
}
[Fact]
public async Task Backend_retry_then_succeed_simulates_cluster_failover()
{
// Spec: "Cluster failover: primary node returns BadCommunicationError;
// picker rotates to secondary; assert eventual success."
//
// The real cluster-failover path is internal to SdkAlarmHistorianWriteBackend
// (which is rig-gated) and is exercised at the HistorianClusterEndpointPicker
// level in HistorianClusterEndpointPickerTests. Here we test the
// AahClientManagedAlarmEventWriter's handling of a backend that returns
// RetryPlease on the first call (primary-node failure) and Ack on the
// second call (secondary-node success), confirming the IPC layer correctly
// propagates the trinary outcome across two separate drain ticks.
var callCount = 0;
var backend = new RecordingBackend(events =>
{
callCount++;
if (callCount == 1)
{
// First call: simulate communication error (isCommunicationError=true)
// which produces RetryPlease — equivalent to primary node failing.
return events.Select(_ => AlarmHistorianWriteOutcome.RetryPlease).ToArray();
}
// Second call (after cluster picker has rotated to secondary): Ack.
return events.Select(_ => AlarmHistorianWriteOutcome.Ack).ToArray();
});
var writer = new AahClientManagedAlarmEventWriter(backend);
var batch = new[] { Event("E1"), Event("E2") };
// First drain tick: primary "fails" → all RetryPlease (false at IPC layer).
var firstResult = await writer.WriteAsync(batch, CancellationToken.None);
firstResult.ShouldBe(new[] { false, false });
// Second drain tick: secondary succeeds → all Ack (true at IPC layer).
var secondResult = await writer.WriteAsync(batch, CancellationToken.None);
secondResult.ShouldBe(new[] { true, true });
backend.Calls.ShouldBe(2);
}
[Theory]
// hresult 0 + clean → Ack
[InlineData(0, false, false, AlarmHistorianWriteOutcome.Ack)]

164
tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Tests/Backend/SdkAlarmHistorianWriteBackendTests.cs Normal file
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@@ -0,0 +1,164 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend;
using ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Ipc;
namespace ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Host.Tests
{
/// <summary>
/// PR C.1 — pins the <see cref="SdkAlarmHistorianWriteBackend"/> contract:
/// <list type="bullet">
/// <item><description>
/// Unit: the placeholder backend returns <see cref="AlarmHistorianWriteOutcome.RetryPlease"/>
/// for every slot so the lmxopcua-side store-and-forward sink retains events rather than
/// dropping them while D.1 is unresolved.
/// </description></item>
/// <item><description>
/// Integration (rig-gated): once D.1 pins the live SDK entry point the Skip attribute is
/// removed. The live test writes a synthetic batch to a real AVEVA Historian and asserts
/// the cluster picker rotates from a broken primary to a healthy secondary.
/// </description></item>
/// </list>
/// </summary>
[Trait("Category", "Unit")]
public sealed class SdkAlarmHistorianWriteBackendTests
{
// ── Placeholder-mode tests (no rig required) ─────────────────────────
[Fact]
public async Task Placeholder_returns_RetryPlease_for_every_slot_so_queue_is_preserved()
{
// The SDK call-site in SdkAlarmHistorianWriteBackend is not yet pinned (PR D.1).
// Until D.1 swaps in the live call, the backend must return RetryPlease for every
// event so the lmxopcua-side SqliteStoreAndForwardSink retains the rows instead of
// dropping them — same effect as the NullAlarmHistorianSink fallback, but each
// slot is individually addressable for the drain worker.
var cfg = new HistorianConfiguration { ServerName = "placeholder-test", Enabled = true };
var backend = new SdkAlarmHistorianWriteBackend(cfg);
var events = new[]
{
AlarmEvent("E1"),
AlarmEvent("E2"),
AlarmEvent("E3"),
};
var outcomes = await backend.WriteBatchAsync(events, CancellationToken.None);
outcomes.Length.ShouldBe(events.Length);
outcomes.ShouldAllBe(o => o == AlarmHistorianWriteOutcome.RetryPlease);
}
[Fact]
public async Task Placeholder_returns_empty_array_for_empty_batch()
{
var cfg = new HistorianConfiguration { ServerName = "placeholder-test", Enabled = true };
var backend = new SdkAlarmHistorianWriteBackend(cfg);
var outcomes = await backend.WriteBatchAsync(Array.Empty<AlarmHistorianEventDto>(), CancellationToken.None);
outcomes.ShouldBeEmpty();
}
[Fact]
public async Task Placeholder_returns_same_count_as_input_for_large_batch()
{
// Guards against an off-by-one error in the placeholder array allocation —
// WriteBatchAsync must always return exactly as many outcomes as input events.
var cfg = new HistorianConfiguration { ServerName = "placeholder-test", Enabled = true };
var backend = new SdkAlarmHistorianWriteBackend(cfg);
var batch = Enumerable.Range(0, 1000).Select(i => AlarmEvent($"E{i}")).ToArray();
var outcomes = await backend.WriteBatchAsync(batch, CancellationToken.None);
outcomes.Length.ShouldBe(1000);
outcomes.ShouldAllBe(o => o == AlarmHistorianWriteOutcome.RetryPlease);
}
// ── Rig-gated integration tests ───────────────────────────────────────
//
// The tests below need a live AVEVA Historian install and are gated with
// Skip="rig-required". Once PR D.1 pins the SDK entry point, remove the
// Skip attribute and add them to the integration test run profile.
[Fact(Skip = "rig-required: needs a live AVEVA Historian + aahClientManaged SDK — enable in PR D.1")]
public async Task Live_single_event_roundtrip_returns_Ack()
{
// Spec (PR C.1, Tests): "1 / 100 / 1000 events through a fake aahClientManaged
// writer; assert per-row outcome list parallel to input order."
//
// This slice exercises the *live* SDK path. The fake-backend variant at
// AahClientManagedAlarmEventWriterTests covers the same assertion without the rig.
var cfg = BuildRigConfig();
var backend = new SdkAlarmHistorianWriteBackend(cfg);
var outcomes = await backend.WriteBatchAsync(new[] { AlarmEvent("rig-E1") }, CancellationToken.None);
outcomes.Length.ShouldBe(1);
outcomes[0].ShouldBe(AlarmHistorianWriteOutcome.Ack);
}
[Fact(Skip = "rig-required: needs a live AVEVA Historian cluster (two nodes) — enable in PR D.1")]
public async Task Live_cluster_failover_primary_bad_rotates_to_secondary()
{
// Spec (PR C.1, Tests): "Cluster failover: primary node returns
// BadCommunicationError; picker rotates to secondary; assert eventual success."
//
// Configure the first server name to point at a deliberately unreachable node
// and the second to the real Historian; the picker should mark the first node
// failed and succeed via the second.
var cfg = new HistorianConfiguration
{
Enabled = true,
ServerNames = new System.Collections.Generic.List<string>
{
"invalid-primary-node-deliberately-unreachable",
Environment.GetEnvironmentVariable("OTOPCUA_HISTORIAN_SERVER") ?? "localhost",
},
Port = TryParseInt("OTOPCUA_HISTORIAN_PORT", 32568),
IntegratedSecurity = true,
FailureCooldownSeconds = 5,
CommandTimeoutSeconds = 10,
};
var backend = new SdkAlarmHistorianWriteBackend(cfg);
var outcomes = await backend.WriteBatchAsync(new[] { AlarmEvent("rig-failover-E1") }, CancellationToken.None);
// The backend must succeed (Ack) via the secondary even though the primary was bad.
outcomes.Length.ShouldBe(1);
outcomes[0].ShouldBe(AlarmHistorianWriteOutcome.Ack);
}
private static AlarmHistorianEventDto AlarmEvent(string id) => new AlarmHistorianEventDto
{
EventId = id,
SourceName = "TestSource",
ConditionId = "TestSource.Level.HiHi",
AlarmType = "AnalogLimitAlarm.HiHi",
Message = "C.1 integration test alarm",
Severity = 500,
EventTimeUtcTicks = DateTime.UtcNow.Ticks,
AckComment = null,
};
private static HistorianConfiguration BuildRigConfig() => new HistorianConfiguration
{
Enabled = true,
ServerName = Environment.GetEnvironmentVariable("OTOPCUA_HISTORIAN_SERVER") ?? "localhost",
Port = TryParseInt("OTOPCUA_HISTORIAN_PORT", 32568),
IntegratedSecurity = true,
CommandTimeoutSeconds = 30,
FailureCooldownSeconds = 60,
};
private static int TryParseInt(string envName, int defaultValue)
{
var raw = Environment.GetEnvironmentVariable(envName);
return int.TryParse(raw, out var parsed) ? parsed : defaultValue;
}
}
}