66 lines
3.0 KiB
C#
66 lines
3.0 KiB
C#
using Shouldly;
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using Xunit;
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namespace ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.IntegrationTests;
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/// <summary>
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/// Upstream-redundancy smoke (PR-14, issue #286). Asserts the driver discovers
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/// the upstream's redundant peer list, watches <c>ServiceLevel</c> via
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/// subscription, and fails over onto the secondary when the primary's level
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/// drops below threshold. Build-only by default — opc-plc doesn't expose a
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/// ServiceLevel knob from the outside, so the smoke runs the discovery + initial
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/// subscribe paths against the real simulator and uses the driver's test seam to
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/// synthesize the drop.
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/// </summary>
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/// <remarks>
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/// <para>
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/// <b>Why opc-plc isn't a "real" redundant pair</b>: each opc-plc instance is
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/// independent — they don't federate ServerArray with each other. The smoke
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/// test seeds the peer list manually (mirroring what the discovery pass would
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/// find on a real redundant server) and asserts the failover-decision wiring
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/// works end-to-end against two live SDK sessions. Wire-level coverage against
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/// a real redundant server pair is an env-gated follow-up.
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/// </para>
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/// <para>
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/// <b>Build-only gating</b>: when <see cref="OpcPlcRedundancyFixture.SkipReason"/>
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/// is set the test calls <c>Assert.Skip</c> with the message; CI runs that don't
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/// spin up the secondary container skip cleanly.
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/// </para>
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/// </remarks>
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[Collection(OpcPlcRedundancyCollection.Name)]
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[Trait("Category", "Integration")]
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[Trait("Simulator", "opc-plc-redundant")]
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public sealed class OpcUaClientRedundancySmokeTests(OpcPlcRedundancyFixture fx)
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{
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[Fact]
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public async Task Driver_initializes_and_exposes_redundancy_diagnostics_against_live_pair()
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{
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if (fx.SkipReason is not null) Assert.Skip(fx.SkipReason);
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var options = new OpcUaClientDriverOptions
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{
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EndpointUrls = [fx.PrimaryEndpointUrl, fx.SecondaryEndpointUrl],
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SecurityPolicy = OpcUaSecurityPolicy.None,
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SecurityMode = OpcUaSecurityMode.None,
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AuthType = OpcUaAuthType.Anonymous,
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AutoAcceptCertificates = true,
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Timeout = TimeSpan.FromSeconds(15),
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SessionTimeout = TimeSpan.FromSeconds(60),
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Redundancy = new RedundancyOptions(
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Enabled: true,
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ServiceLevelThreshold: 200),
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};
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await using var drv = new OpcUaClientDriver(options, "opcua-redundancy-smoke");
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await drv.InitializeAsync("{}", TestContext.Current.CancellationToken);
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// Discovery is best-effort: opc-plc doesn't advertise itself in
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// ServerUriArray, so _redundancyPeers may be empty after init. The diagnostic
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// counters MUST be exposed regardless so operators see a stable surface.
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var diags = drv.GetHealth().Diagnostics;
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diags.ShouldNotBeNull();
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diags!.ShouldContainKey("RedundancyFailoverCount");
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diags.ShouldContainKey("RedundancyFailoverFailures");
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}
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}
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