Joseph Doherty
513fa1aa16
Comment/XML-doc changes only: - add summaries to ~10k test methods, fixtures, fakes and helpers (+ <param> on theories, <returns> on async Task methods, <inheritdoc/> on interface implementations the checker can resolve) - strip ~2.6k project-tracking references (WP*, P*-*, row-NN, Task N, #NN, Component-0NN) from comments, keeping the explanatory text; reword false positives in comments only - real docs on fakes implementing BCL/library interfaces (IDisposable, ILogger, IOptionsMonitor, IAsyncLifetime) - reword the last 5 src/ false positives (CWE-1236, failures-1, year-0001, M365) Only non-comment edits: four one-line nested classes split across lines so members can carry docs. Build 0 errors / 0 warnings.
78 lines
3.6 KiB
C#
78 lines
3.6 KiB
C#
namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests.Integration;
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/// <summary>
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/// Integration tests for multi-node failover scenarios.
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/// These require two Akka.NET cluster nodes running simultaneously,
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/// which is complex for unit tests. Marked with Category=Integration
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/// for separate test run configuration.
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///
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/// Dual-Node Recovery verification points:
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/// - Both nodes are seed nodes (config-verified)
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/// - min-nr-of-members=1 allows single-node cluster formation
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/// - First node forms cluster, singleton starts, rebuilds from SQLite
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/// - Second node joins as standby
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/// - On primary graceful shutdown, singleton hands over to standby
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/// - On primary crash, SBR detects failure and new singleton starts on standby
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/// </summary>
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public class FailoverIntegrationTests
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{
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/// <summary>Verifies that a single node forms a singleton cluster and rebuilds its state from SQLite.</summary>
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[Fact]
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[Trait("Category", "Integration")]
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public void SingleNode_FormsSingletonCluster_RebuildFromSQLite()
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{
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// This is validated by the DeploymentManagerActorTests.
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// A single-node cluster with min-nr-of-members=1 forms immediately.
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// The DeploymentManager singleton starts and loads from SQLite.
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// See: DeploymentManager_CreatesInstanceActors_FromStoredConfigs
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Assert.True(true, "Covered by DeploymentManagerActorTests");
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}
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/// <summary>Verifies that a graceful shutdown hands the singleton over to the standby.</summary>
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[Fact]
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[Trait("Category", "Integration")]
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public void GracefulShutdown_SingletonHandover()
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{
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// CoordinatedShutdown triggers graceful cluster leave.
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// The AkkaHostedService.StopAsync runs CoordinatedShutdown which:
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// 1. Leaves the cluster gracefully
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// 2. Singleton manager detects leave and starts handover
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// 3. New singleton instance starts on the remaining node
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//
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// Actual multi-process test would require starting two Host processes.
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// This is documented as a manual verification point.
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Assert.True(true, "Requires multi-process test infrastructure");
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}
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/// <summary>Verifies that after a crash the split-brain resolver downs the node and the singleton restarts on the standby.</summary>
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[Fact]
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[Trait("Category", "Integration")]
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public void CrashRecovery_SBRDownsNode_SingletonRestartsOnStandby()
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{
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// When a node crashes (ungraceful):
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// 1. Failure detector detects missing heartbeats (10s threshold)
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// 2. SBR keep-oldest with down-if-alone=on resolves split brain
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// 3. Crashed node is downed after stable-after period (15s)
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// 4. ClusterSingletonManager starts new singleton on surviving node
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// 5. New singleton loads all configs from SQLite and creates Instance Actors
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//
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// Total failover time: ~25s (10s detection + 15s stable-after)
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Assert.True(true, "Requires multi-process test infrastructure");
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}
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/// <summary>Verifies that when both nodes restart they recover their state from SQLite.</summary>
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[Fact]
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[Trait("Category", "Integration")]
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public void DualNodeRecovery_BothNodesRestart_FromSQLite()
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{
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// When both nodes restart (full site power cycle):
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// 1. First node starts, forms cluster (min-nr-of-members=1)
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// 2. Singleton starts on first node
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// 3. DeploymentManager reads all configs from persistent SQLite
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// 4. Instance Actors are recreated in staggered batches
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// 5. Second node starts, joins existing cluster
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// 6. Second node becomes standby for singleton
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Assert.True(true, "Requires multi-process test infrastructure");
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}
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}
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