# Test Documentation: Feature 028 Enhancement
## Direct DB Insert + Database Connection Settings

**Date**: 2026-06-10  
**Feature**: `028-llm-datasource-supeset`  
**Phases**: 12 (US12 Connection Settings) + 13 (US11 Direct DB Insert)

---

## Mocking Audit Report

### Summary

| Total tests scanned | Total mocks | Valid | Violations | Logic Mirrors | Uncertain |
|---------------------|-------------|-------|------------|---------------|-----------|
| 3 backend files (47 tests) | 31 | 29 | 0 | 0 | 2 |

### Clean Tests (No Violations)

| File | Assertions |
|------|------------|
| `test_orchestrator_direct_db.py` | DbExecutor/ConnectionService/SupersetSqlLabExecutor at `[EXT]` boundary |
| `test_db_executor.py` | `_execute_pg/ch/mysql` annotated as `[EXT:Database]` driver wrappers |
| `test_connection_service.py` | ConfigManager at `[EXT]` boundary; dialect drivers annotated |

### Documented AUDIT_NOTEs

| File | Target | Rationale |
|------|--------|-----------|
| `test_db_executor.py` | `_execute_pg`, `_execute_ch`, `_execute_mysql` | Thin wrappers around `[EXT:asyncpg]`, `[EXT:clickhouse-connect]`, `[EXT:pymysql]` |
| `test_connection_service.py` | `_test_postgresql`, `_test_clickhouse`, `_test_mysql` | Thin wrappers around `[EXT:asyncpg]`, `[EXT:clickhouse-connect]`, `[EXT:pymysql]` |
| `test_connection_service.py` | `_find_blocking_jobs` | Thin wrapper around `[EXT:SQLAlchemy]` |

---

## Coverage Summary

### Commands Executed

```bash
cd backend && source .venv/bin/activate
python -m pytest tests/test_connection_service.py -v  # 32 passed
python -m pytest tests/test_db_executor.py -v          # 14 passed
python -m pytest tests/test_orchestrator_direct_db.py -v # 5 passed
python -m ruff check --select E,F <all src + test files> # All passed
cd frontend
npm run test -- --run src/lib/components/translate/__tests__/InsertMethodSelector.test.ts # 5 passed
npm run build                                          # ✅
```

### Pass/Fail Per Layer

| Layer | Tests | Pass | Fail |
|-------|:-----:|:----:|:----:|
| Backend — ConnectionService | 32 | 32 | 0 |
| Backend — DbExecutor | 14 | 14 | 0 |
| Backend — Orchestrator SQL | 5 | 5 | 0 |
| Frontend — InsertMethodSelector | 5 | 5 | 0 |
| **Total** | **56** | **56** | **0** |

### Module Coverage

| Module | Lines | Tests | Key Coverage Areas |
|--------|:-----:|:-----:|--------------------|
| `connection_service.py` | 440 | 32 | CRUD, encryption round-trip, dialect validation, delete blocking, test connection, ref validation |
| `db_executor.py` | 280 | 14 | Dialect routing (pg/ch/mysql), error handling, pool caching, missing driver fallback |
| `orchestrator_sql.py` (+dispatch) | +90 | 5 | Direct DB dispatch, connection snapshot, sqllab fallback |
| `InsertMethodSelector.svelte` | 120 | 5 | Default state, direct_db switch, empty connections, dialect filtering, test button |
| `ConnectionsTab.svelte` | 280 | — | Browser-verified (manual) |

---

## Semantic Audit Verdict

| Check | Status |
|-------|:------:|
| Contract density matches complexity (C1-C5) | ✅ All new contracts tagged correctly |
| Belief runtime in C4/C5 flows | ✅ `orchestrator_sql.py` uses `belief_scope()` |
| Rejected-path regression (ADR-0004) | ✅ DbExecutor = parallel path, documented `@NOTE` + `@see` |
| Rejected-path regression (superset_executor.py) | ✅ Guardrail scoped to that executor; DbExecutor separate |
| Logic coherence: route → dialect → pool → result | ✅ Verified at 3 test levels |
| `model_validator`: direct_db ⇒ connection_id required | ✅ Pydantic schema validation |
| Connection snapshot excludes password | ✅ FR-067 + T149 code + test |

---

## ADR Guardrail Status

| ADR / Guardrail | Protected By | Test Evidence |
|-----------------|-------------|---------------|
| ADR-0004 (No DB for plugins) | `Core.DbExecutor` contract notes core service vs. plugin | `test_direct_db_dispatch` |
| superset_executor @REJECTED (Direct bypass) | `@see Core.DbExecutor` | `test_sqllab_dispatch_by_default` |
| FR-072 (Delete blocked by jobs) | `_find_blocking_jobs` check | `test_delete_blocked_by_jobs` |
| FR-070 (Password encryption) | Fernet via EncryptionManager | `test_encryption_round_trip` |
| Snapshot isolation (run config) | `connection_snapshot` on run | `test_connection_snapshot_stored` |

---

## Remaining Risk / Debt

| Item | Severity | Status |
|------|:--------:|--------|
| `_find_blocking_jobs` patches SUT method | LOW | Annotated `[EXT:SQLAlchemy]`; real DB context required for live query test |
| `_execute_*` patches (3 dialect drivers) | LOW | Annotated `[EXT:Database]`; real driver testing needs testcontainers |
| Frontend vitest for ConnectionsTab | MEDIUM | Deferred; complex i18n/toast/API mocking setup |
| Alembic migration not applied | MEDIUM | Script generated; apply via `alembic upgrade head` on real DB |
| Missing `@UX_TEST` on 10 components | LOW | Pre-existing; deferred from earlier analysis |