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Marc Schier
49305d9085
# Description V2 subscription engine feature parity round to make the classic engine eligible for deprecation. Splits the test surface so the classic and V2 engines can evolve independently, ports the gaps the classic-engine integration tests had been exercising, and lands the public V2 API additions needed to close them. - Splits `Tests/Opc.Ua.Subscriptions.Tests` into a classic (`Opc.Ua.Subscriptions.Classic.Tests`) and a V2 (`Opc.Ua.Subscriptions.Tests`) project to shrink CI time and let the two engines diverge cleanly. - Adds the V2 public-surface gaps required by the test ports (`Subscription.ServerId` on the class, `SetSubscriptionDurableAsync`, `SendInitialValuesOnTransfer`, unified `OnSubscriptionStateChangedAsync` handler callback, per-item `ConditionRefreshAsync`, fluent `LoadSubscriptionsAsync(Stream, …)` and `Subscription.Snapshot()` / `RestoreAsync()` for save/load + transfer). - Lands handler-centric design (no `PublishingStopped` property handlers maintain derived state); always-sequential per-subscription delivery documented + tested. - **Adds short and long haul stability tests for the V2 `ManagedSession` + subscription engine. Closes #3744** (see "Issue #3744 Haul tests" below). - **Migrates SubscriptionStateSnapshot / MonitoredItemStateSnapshot to `[DataType]` source-generator codecs**. - `SubscriptionDurableV2Tests.cs` 5 V2 ports of the classic durable test patterns. - `V2FollowUpCoverageTests.cs` handler state-change callback, fluent stream-based `LoadSubscriptionsAsync`, `SendInitialValuesOnTransfer`, snapshot edge cases (empty / `DataChangeFilter` round-trip / concurrent mutation). - `SubscriptionFailoverV2Tests.cs` forced channel-break with and without `WithTransferSubscriptionsOnRecreate`. - `MonitoredItemConditionRefreshLiveV2Tests.cs` — live `ConditionRefresh` against the reference server's event source; asserts `RefreshStart` / `RefreshEnd` events flow through the handler. ## Fixes - #3744 Haul tests (V2 ManagedSession + subscription engine) `Tests/Opc.Ua.Sessions.Tests/ManagedSessionStabilityTest.cs` adds the short/long haul coverage requested by [#3744](https://github.com/OPCFoundation/UA-.NETStandard/issues/3744) plus the bonus fault-injection variant: | Test | Duration | Category | Purpose | |---|---|---|---| | `ShortHaulManagedSessionV2Async` | 2 minutes | `ManagedSessionHaul` (`[Explicit]`) | Quick local sanity check of the V2 monotonicity contract. | | `LongHaulManagedSessionV2Async` | 90 minutes (configurable via `TEST_DURATION_MINUTES`) | `ManagedSessionHaul` (`[Explicit]`) | Long-running V2 stability + monotonicity. | | `LongHaulManagedSessionWithFaultInjectionV2Async` | 90 minutes (configurable) + fault every `FAULT_INJECTION_INTERVAL_SECONDS` (default 60s) | `ManagedSessionHaul` (`[Explicit]`) | **Bonus** — force-closes the subscriber transport channel periodically; verifies V2 manager transfers/recreates the subscription and continues monotonic delivery across reconnects. | **Pattern.** A writer `ManagedSession` increments a `uint32` counter and writes it into `Scalar_Static_Mass_UInt32_UInt32_00` every 250ms. A subscriber `ManagedSession` runs a V2 subscription with a single monitored item on the same node. `MonotonicCounterHandler` asserts each received sample is *strictly greater than* the previous one. V2 `ISubscriptionNotificationHandler` per-subscription ordering guarantee. Skipped values (sampling rate < write rate) are tolerated; duplicates and reorderings are violations.