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seaweedfs/sw-block/test/v2_selected.md
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pingqiuandClaude Opus 4.6 edec7098e8 feat: add V2 protocol simulator and enginev2 sender/session prototype 
Adds sw-block/ directory with:

- distsim: protocol correctness simulator (96 tests)
  - cluster model with epoch fencing, barrier semantics, commit modes
  - endpoint identity, control-plane flow, candidate eligibility
  - timeout events, timer races, same-tick ordering
  - session ownership tracking with ID-based stale fencing

- enginev2: standalone V2 sender/session implementation (63 tests)
  - per-replica Sender with identity-preserving reconciliation
  - RecoverySession with FSM phase transitions and session ID
  - execution APIs: BeginConnect, RecordHandshake, BeginCatchUp,
    RecordCatchUpProgress, CompleteSessionByID — all sender-authority-gated
  - recovery outcome branching: zero-gap, catch-up, needs-rebuild
  - assignment-intent orchestration with epoch fencing

- design docs: acceptance criteria, open questions, first-slice spec,
  protocol development process

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-28 10:38:27 -07:00

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# V2-Selected Test Worklist
Date: 2026-03-27
Status: working
## Purpose
This is the V2-facing subset of the larger block-service test database.
Sources:
- `sw-block/test/test_db.md`
- `learn/projects/sw-block/phases/phase13_test.md`
- `learn/projects/sw-block/phases/phase-13-v2-boundary-tests.md`
This file is for:
- tests that should help V2 design and simulator work
- explicit inclusion of the 4 Phase 13 V2-boundary failures
- a working set that `tester`, `sw`, and design can refine further
## Current Inclusion Rule
Include tests that are:
- `sim_core`
- `sim_reduced`
- `v2_boundary`
Prefer tests that directly inform:
- barriers and durability truth
- catch-up vs rebuild
- failover / promotion
- WAL retention / tail-chasing
- mode semantics
- endpoint / identity / reassignment behavior
## Phase 13 V2-Boundary Tests
These must stay visible in the V2 worklist:
| Test | File | Why It Matters To V2 |
|---|---|---|
| `TestAdversarial_ReconnectUsesHandshakeNotBootstrap` | `sync_all_adversarial_test.go` | Sender identity and reconnect ownership |
| `TestAdversarial_NeedsRebuildBlocksAllPaths` | `sync_all_adversarial_test.go` | `NeedsRebuild` must remain sticky and identity-safe |
| `TestAdversarial_CatchupDoesNotOverwriteNewerData` | `sync_all_adversarial_test.go` | Catch-up must preserve data correctness under identity continuity |
| `TestAdversarial_CatchupMultipleDisconnects` | `sync_all_adversarial_test.go` | Multiple reconnect cycles require stable per-replica sender ownership |
## High-Value V2 Working Set
This is the current distilled working set from `phase13_test.md`.
| Test | File | Current Result | Mapping | Why It Helps V2 |
|---|---|---|---|---|
| `TestRecovery` | `recovery_test.go` | PASS | `sim_core` | Crash recovery correctness |
| `TestReplicaProgress_BarrierUsesFlushedLSN` | `sync_all_protocol_test.go` | PASS | `sim_core` | Barrier truth / durable progress |
| `TestReplicaProgress_FlushedLSNMonotonicWithinEpoch` | `sync_all_protocol_test.go` | PASS | `sim_core` | Monotonic progress invariant |
| `TestBarrier_RejectsReplicaNotInSync` | `sync_all_protocol_test.go` | PASS | `sim_core` | State-gated strict durability |
| `TestBarrier_EpochMismatchRejected` | `sync_all_protocol_test.go` | PASS | `sim_core` | Epoch fencing |
| `TestBug1_SyncAll_WriteDuringDegraded_SyncCacheMustFail` | `sync_all_bug_test.go` | PASS | `sim_core` | `sync_all` strictness during outage |
| `TestSyncAll_FullRoundTrip_WriteAndFlush` | `sync_all_bug_test.go` | PASS | `sim_core` | End-to-end strict replication |
| `TestBestEffort_FlushSucceeds_ReplicaDown` | `sync_all_protocol_test.go` | PASS | `sim_core` | Mode difference vs strict sync |
| `TestShip_DegradedDoesNotSilentlyCountAsHealthy` | `sync_all_protocol_test.go` | PASS | `sim_core` | No false durability |
| `TestDistSync_SyncAll_AllDegraded_Fails` | `dist_group_commit_test.go` | PASS | `sim_core` | Availability semantics |
| `TestBug2_SyncAll_SyncCache_AfterDegradedShipperRecovers` | `sync_all_bug_test.go` | PASS | `sim_core` | Recoverability after degraded shipper |
| `TestReconnect_CatchupFromRetainedWal` | `sync_all_protocol_test.go` | PASS | `sim_core` | Short-gap catch-up |
| `TestReconnect_GapBeyondRetainedWal_NeedsRebuild` | `sync_all_protocol_test.go` | PASS | `sim_core` | Catch-up vs rebuild boundary |
| `TestReconnect_EpochChangeDuringCatchup_Aborts` | `sync_all_protocol_test.go` | PASS | `sim_core` | Recovery fencing |
| `TestCatchupReplay_DataIntegrity_AllBlocksMatch` | `sync_all_protocol_test.go` | PASS | `sim_core` | Recovery data correctness |
| `TestCatchupReplay_DuplicateEntry_Idempotent` | `sync_all_protocol_test.go` | PASS | `sim_core` | Replay idempotence |
| `TestBarrier_DuringCatchup_Rejected` | `sync_all_protocol_test.go` | PASS | `sim_core` | State-machine correctness |
| `TestReplicaState_RebuildComplete_ReentersInSync` | `rebuild_v1_test.go` | PASS | `sim_core` | Rebuild lifecycle |
| `TestRebuild_AbortOnEpochChange` | `rebuild_v1_test.go` | PASS | `sim_core` | Rebuild fencing |
| `TestRebuild_MissingTailRestartsOrFailsCleanly` | `rebuild_v1_test.go` | PASS | `sim_core` | No partial/unsafe rebuild success |
| `TestWalRetention_RequiredReplicaBlocksReclaim` | `sync_all_protocol_test.go` | PASS | `sim_core` | Retention rule |
| `TestWalRetention_TimeoutTriggersNeedsRebuild` | `sync_all_protocol_test.go` | PASS | `sim_core` | Retention timeout boundary |
| `TestWalRetention_MaxBytesTriggersNeedsRebuild` | `sync_all_protocol_test.go` | PASS | `sim_core` | Retention budget boundary |
| `TestComponent_FailoverPromote` | `component_test.go` | PASS | `sim_core` | Failover baseline |
| `TestCP13_SyncAll_FailoverPromotesReplica` | `cp13_protocol_test.go` | PASS | `sim_core` | Strict-mode failover |
| `TestCP13_SyncAll_ReplicaRestart_Rejoin` | `cp13_protocol_test.go` | PASS | `sim_core` | Restart/rejoin lifecycle |
| `TestQA_LSNLag_StaleReplicaSkipped` | `qa_block_edge_cases_test.go` | PASS | `sim_core` | Promotion safety |
| `TestQA_CascadeFailover_RF3_EpochChain` | `qa_block_edge_cases_test.go` | PASS | `sim_core` | Multi-promotion lineage |
| `TestDurabilityMode_Validate_SyncQuorum_RF2_Rejected` | `durability_mode_test.go` | PASS | `sim_core` | Mode normalization |
| `TestCP13_BestEffort_SurvivesReplicaDeath` | `cp13_protocol_test.go` | PASS | `sim_core` | Best-effort contract |
| `CP13-8 T4a: sync_all blocks during outage` | `manual` | PASS | `sim_core` | Strict outage semantics |
| `CP13-8 T4b: recovery after restart` | `manual` | PASS | `sim_reduced` | Recovery-time shape |
## Reduced / Supporting Cases To Keep In View
| Test | File | Current Result | Mapping | Why It Helps V2 |
|---|---|---|---|---|
| `testRecoverExtendedScanPastStaleHead` | `recovery_test.go` | PASS | `sim_reduced` | Advisory WAL-head recovery shape |
| `testRecoverNoSuperblockPersist` | `recovery_test.go` | PASS | `sim_reduced` | Recoverability despite optimized persist behavior |
| `TestQAGroupCommitter` | `blockvol_qa_test.go` | PASS | `sim_reduced` | Commit batching semantics |
| `TestQA_Admission_WriteLBAIntegration` | `qa_wal_admission_test.go` | PASS | `sim_reduced` | Backpressure behavior |
| `TestSyncAll_MultipleFlush_NoWritesBetween` | `sync_all_bug_test.go` | PASS | `sim_reduced` | Idempotent flush shape |
| `TestRebuild_PostRebuild_FlushedLSN_IsCheckpoint` | `rebuild_v1_test.go` | PASS | `sim_reduced` | Progress initialization |
| `TestComponent_ManualPromote` | `component_test.go` | PASS | `sim_reduced` | Manual control-path shape |
| `TestHeartbeat_ReportsPerReplicaState` | `rebuild_v1_test.go` | PASS | `sim_reduced` | Heartbeat observability |
| `TestHeartbeat_ReportsNeedsRebuild` | `rebuild_v1_test.go` | PASS | `sim_reduced` | Control-plane visibility |
| `TestComponent_ExpandThenFailover` | `component_test.go` | PASS | `sim_reduced` | Cross-operation state continuity |
| `TestCP13_DurabilityModeDefault` | `cp13_protocol_test.go` | PASS | `sim_reduced` | Default mode behavior |
## Working Note
`phase13_test.md` currently contains the mapped subset from the real test inventory.
This V2 copy is intentionally narrower:
- preserve the core tests that define the protocol story
- preserve the 4 V2-boundary tests explicitly
- keep a smaller reduced set for supporting invariants
If `tester` finalizes a broader 70-case working set, extend this file rather than editing the full copied database directly.
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