# Batch 0 Implementable Tests Implementation Plan

> **For Codex:** REQUIRED SUB-SKILL: Use `executeplan` to implement this plan task-by-task.

**Goal:** Port and verify all currently implementable Batch 0 deferred tests (553 candidates) whose feature dependencies are already verified, while keeping runtime-blocked tests deferred with explicit notes.

**Architecture:** Use a query-driven manifest as the Batch 0 source of truth, then execute class-by-class test porting in `ImplBacklog` files with tight red/green verification loops. After each class wave, update only the proven test IDs in PortTracker (`verified` for passing ports, `deferred` with notes for runtime-blocked tests). Keep production code unchanged unless a test reveals a real feature regression.

**Tech Stack:** .NET 10, xUnit 3, Shouldly, NSubstitute, SQLite (`porting.db`), PortTracker CLI

**Design doc:** `docs/plans/2026-02-27-batch-0-implementable-tests-design.md`

---

### Task 1: Generate Batch 0 Manifest and Reconcile Mapping

**Files:**
- Modify: `porting.db` (`batch_tests`, `implementation_batches`)
- Create: `/tmp/batch0-implementable-tests.csv`

**Step 1: Generate manifest**

Run:

```bash
sqlite3 -header -csv porting.db "
WITH implementable AS (
  SELECT t.id, t.dotnet_class, t.dotnet_method, t.go_file, t.go_method
  FROM unit_tests t
  WHERE t.status='deferred'
    AND EXISTS (
      SELECT 1 FROM dependencies d
      JOIN features f ON f.id=d.target_id AND d.target_type='feature'
      WHERE d.source_type='unit_test' AND d.source_id=t.id
    )
    AND NOT EXISTS (
      SELECT 1 FROM dependencies d
      JOIN features f ON f.id=d.target_id AND d.target_type='feature'
      WHERE d.source_type='unit_test' AND d.source_id=t.id
        AND f.status NOT IN ('verified','complete','n_a')
    )
)
SELECT * FROM implementable ORDER BY dotnet_class, id;
" > /tmp/batch0-implementable-tests.csv
```

Expected: CSV created with ~553 rows.

**Step 2: Reconcile Batch 0 mapping**

Run:

```bash
sqlite3 porting.db "
INSERT INTO batch_tests (batch_id, test_id)
SELECT 0, t.id
FROM unit_tests t
WHERE t.status='deferred'
  AND EXISTS (
    SELECT 1 FROM dependencies d
    JOIN features f ON f.id=d.target_id AND d.target_type='feature'
    WHERE d.source_type='unit_test' AND d.source_id=t.id
  )
  AND NOT EXISTS (
    SELECT 1 FROM dependencies d
    JOIN features f ON f.id=d.target_id AND d.target_type='feature'
    WHERE d.source_type='unit_test' AND d.source_id=t.id
      AND f.status NOT IN ('verified','complete','n_a')
  )
  AND NOT EXISTS (SELECT 1 FROM batch_tests bt WHERE bt.test_id=t.id);

UPDATE implementation_batches
SET test_count=(SELECT COUNT(*) FROM batch_tests WHERE batch_id=0)
WHERE id=0;
"
```

Expected: `batch show 0` now reports Batch 0 tests > 0.

**Step 3: Verify mapping**

Run:

```bash
/usr/local/share/dotnet/dotnet run --project tools/NatsNet.PortTracker -- batch show 0 --db porting.db
```

Expected: Batch 0 includes mapped tests.

**Step 4: Commit**

```bash
git add porting.db
git commit -m "chore(porttracker): reconcile batch 0 implementable test mappings"
```

---

### Task 2: Apply Porting Template to One Seed Test Per Class

**Files:**
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/*.Impltests.cs` (one method per class)
- Read: `golang/nats-server/server/*_test.go`

**Step 1: Replace one placeholder method body with behavior-faithful assertions**

Template:

```csharp
[Fact] // T:<id>
public void <DotnetMethod>()
{
    // Arrange (from Go test setup)
    var subject = /* translated setup */;

    // Act
    var result = /* invocation under test */;

    // Assert (exact behavioral intent from Go)
    result.ShouldBe(/* expected */);
}
```

**Step 2: Run method-level filter**

Run:

```bash
/usr/local/share/dotnet/dotnet test dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ \
  --filter "FullyQualifiedName~ZB.MOM.NatsNet.Server.Tests.ImplBacklog.<ClassName>.<DotnetMethod>"
```

Expected: fail first if placeholder previously masked behavior; pass after fixing setup/assertions.

**Step 3: Repeat for all 28 classes as seed tests**

Expected: each class has at least one real, non-placeholder port.

**Step 4: Commit**

```bash
git add dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog
git commit -m "test(batch0): replace seed placeholders with behavior ports across classes"
```

---

### Task 3: Port Account/Auth/Options Cluster (Core Low-Infra)

**Files:**
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/AccountTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/AuthHandlerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/AuthCalloutTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JwtProcessorTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/ServerOptionsTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/ConfigReloaderTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/CertificateStoreWindowsTests.Impltests.cs`

**Step 1: Port methods for these classes from Go tests**

Reference Go files:

- `golang/nats-server/server/accounts_test.go`
- `golang/nats-server/server/auth_test.go`
- `golang/nats-server/server/auth_callout_test.go`
- `golang/nats-server/server/jwt_test.go`
- `golang/nats-server/server/opts_test.go`
- `golang/nats-server/server/reload_test.go`

**Step 2: Tag runtime-blocked cases**

If Go method requires live server/cluster/process orchestration, keep deferred and add explicit reason note later.

**Step 3: Run per-class tests**

Run one class at a time:

```bash
/usr/local/share/dotnet/dotnet test dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ \
  --filter "FullyQualifiedName~ZB.MOM.NatsNet.Server.Tests.ImplBacklog.AccountTests"
```

Expected: class green before status updates.

**Step 4: Update statuses for proven IDs**

Run:

```bash
IDS=$(sqlite3 porting.db "
WITH implementable AS (
  SELECT t.id,t.dotnet_class
  FROM unit_tests t
  WHERE t.status='deferred'
    AND EXISTS (SELECT 1 FROM dependencies d JOIN features f ON f.id=d.target_id AND d.target_type='feature'
                WHERE d.source_type='unit_test' AND d.source_id=t.id)
    AND NOT EXISTS (SELECT 1 FROM dependencies d JOIN features f ON f.id=d.target_id AND d.target_type='feature'
                    WHERE d.source_type='unit_test' AND d.source_id=t.id
                      AND f.status NOT IN ('verified','complete','n_a'))
)
SELECT group_concat(id, ',') FROM implementable
WHERE dotnet_class IN ('AccountTests','AuthHandlerTests','AuthCalloutTests','JwtProcessorTests','ServerOptionsTests','ConfigReloaderTests','CertificateStoreWindowsTests');
")
/usr/local/share/dotnet/dotnet run --project tools/NatsNet.PortTracker -- \
  test batch-update --ids "$IDS" --set-status verified --db porting.db --execute
```

Expected: IDs verified only after passing evidence.

**Step 5: Commit**

```bash
git add dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog porting.db
git commit -m "test(batch0): port account/auth/options implementable tests"
```

---

### Task 4: Port Routing and Edge Transport Cluster

**Files:**
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/RouteHandlerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/GatewayHandlerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/LeafNodeHandlerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/WebSocketHandlerTests.Impltests.cs`

**Step 1: Port deterministic tests from Go route/gateway/leaf/websocket files**

**Step 2: Keep runtime-only topology tests deferred with notes**

**Step 3: Run class filters**

```bash
/usr/local/share/dotnet/dotnet test dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ \
  --filter "FullyQualifiedName~ZB.MOM.NatsNet.Server.Tests.ImplBacklog.RouteHandlerTests"
```

Expected: pass per class.

**Step 4: Update statuses for passing IDs and commit**

Use `test batch-update --ids "$IDS" --set-status verified --execute` for this class set, then commit.

---

### Task 5: Port Server Introspection and Events Cluster

**Files:**
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/EventsHandlerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/MonitoringHandlerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/MessageTracerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/NatsServerTests.Impltests.cs`

**Step 1: Replace placeholder assertions with behavior-based assertions from Go tests**

**Step 2: Validate log/JSON/monitor payload contracts with strict Shouldly checks**

**Step 3: Run class filters and update statuses**

Expected: each class green before DB status updates.

**Step 4: Commit**

```bash
git add dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog porting.db
git commit -m "test(batch0): port monitoring/events/server implementable tests"
```

---

### Task 6: Port Concurrency and Process-Control Cluster

**Files:**
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/ConcurrencyTests1.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/ConcurrencyTests2.Impltests.cs`

**Step 1: Port race-safe deterministic cases only**

Use timeout-safe async assertions and avoid nondeterministic sleep-based checks.

**Step 2: Run each class repeatedly**

Run:

```bash
for i in 1 2 3; do
  /usr/local/share/dotnet/dotnet test dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ \
    --filter "FullyQualifiedName~ZB.MOM.NatsNet.Server.Tests.ImplBacklog.ConcurrencyTests1";
done
```

Expected: stable pass across repeated runs.

**Step 3: Update statuses + commit**

Mark passing IDs verified; keep flaky/runtime-bound cases deferred with notes.

---

### Task 7: Port JetStream Small/Deterministic Cluster

**Files:**
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamVersioningTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamBatchingTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamJwtTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamTpmTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamLeafNodeTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/StorageEngineTests.Impltests.cs`

**Step 1: Port only no-cluster/no-live-server methods**

**Step 2: For cluster-required tests, keep deferred and annotate notes**

Example note: `deferred: requires running JetStream cluster/runtime`.

**Step 3: Run class filters; update statuses; commit**

Expected: deterministic classes pass; blocked cases stay deferred with reasons.

---

### Task 8: Port JetStream Consumer/Engine Heavy Cluster

**Files:**
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/NatsConsumerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamEngineTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/JetStreamClusterTests2.Impltests.cs`

**Step 1: Work test-by-test with strict triage**

For each method:

1. Port and run method-level filter.
2. If runtime-bound, revert method to deferred state marker and keep status deferred.
3. If unit-portable, finish port and keep in verified candidate list.

**Step 2: Run full class filters**

Expected: passing set is stable.

**Step 3: Update statuses and commit**

Use class-specific ID lists from manifest to avoid accidental status drift.

---

### Task 9: Port MQTT Cluster

**Files:**
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/MqttHandlerTests.Impltests.cs`
- Modify: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/MqttExternalTests.Impltests.cs`

**Step 1: Port unit-level parser/options/utility tests**

**Step 2: Defer broker-runtime tests with explicit notes**

**Step 3: Run class filters; update statuses; commit**

Expected: no silent skips; each deferred item has rationale.

---

### Task 10: Final Batch 0 Verification and Status Closure

**Files:**
- Modify: `porting.db`
- Optional update: `reports/current.md` (via report generation script)

**Step 1: Run targeted regression sweep for all touched Batch 0 classes**

Run:

```bash
/usr/local/share/dotnet/dotnet test dotnet/tests/ZB.MOM.NatsNet.Server.Tests/
```

Expected: all touched classes pass.

**Step 2: Validate remaining implementable deferred count**

Run:

```bash
sqlite3 porting.db "
WITH implementable AS (
  SELECT t.id
  FROM unit_tests t
  WHERE t.status='deferred'
    AND EXISTS (
      SELECT 1 FROM dependencies d
      JOIN features f ON f.id=d.target_id AND d.target_type='feature'
      WHERE d.source_type='unit_test' AND d.source_id=t.id
    )
    AND NOT EXISTS (
      SELECT 1 FROM dependencies d
      JOIN features f ON f.id=d.target_id AND d.target_type='feature'
      WHERE d.source_type='unit_test' AND d.source_id=t.id
        AND f.status NOT IN ('verified','complete','n_a')
    )
)
SELECT COUNT(*) FROM implementable;
"
```

Expected: `0` (or only explicitly documented runtime-blocked exceptions).

**Step 3: Verify Batch 0 visibility**

Run:

```bash
/usr/local/share/dotnet/dotnet run --project tools/NatsNet.PortTracker -- batch show 0 --db porting.db
/usr/local/share/dotnet/dotnet run --project tools/NatsNet.PortTracker -- report summary --db porting.db
```

Expected: Batch 0 test count reduced/closed and summary reflects updates.

**Step 4: Final commit**

```bash
git add dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog porting.db reports/current.md
git commit -m "test(batch0): port implementable deferred tests and close batch 0"
```

---

## Batch 0 Working Set (Current)

- Total implementable candidates: **553**
- Primary files: `dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ImplBacklog/*.Impltests.cs`
- Highest-volume classes:
  - `JetStreamEngineTests` (89)
  - `MonitoringHandlerTests` (76)
  - `MqttHandlerTests` (56)
  - `LeafNodeHandlerTests` (47)
  - `NatsConsumerTests` (35)

## TDD Guardrails

- Never bulk-mark IDs `verified` before class-level green runs.
- Preserve `T:<id>` comments to keep DB traceability.
- If production behavior mismatches Go spec, stop and open feature-fix work rather than weakening assertions.
- Keep tests deterministic: avoid timing races and process-global side effects where possible.