# Safety Net — Existing Coverage

**Date**: 2026-05-10
**Run**: 03-code-quality-refactoring (Phase 3, refactor skill)
**Mode**: re-verification of Step 7 baseline

## Result

**GATE: PASS**

Existing tests are sufficient to act as the safety net for the 27 changes in `list-of-changes.md`.

## Test Suite Inventory

| Suite | Project | Pre-refactor count | Re-run count | Outcome |
|-------|---------|-------------------:|-------------:|---------|
| Unit tests | `SatelliteProvider.Tests` | 35 | **40** | 40/40 PASS |
| Integration smoke | `SatelliteProvider.IntegrationTests` (`scripts/run-tests.sh --smoke`) | 5 | **5** | 5/5 PASS |
| Integration full | `SatelliteProvider.IntegrationTests` (`scripts/run-tests.sh --full`) | 11 | not re-run | green per Step 7 |

Re-run wall clock: ~88 s (`scripts/run-tests.sh --smoke`).

The unit count grew from 35 → 40 between Step 7 and now. Source code under `src/`-equivalent components is unchanged in this window (git status shows only documentation, `.gitignore`, and `_docs/_autodev_state.md` modifications); the additional unit tests came from earlier `dev` branch work that landed before Step 8 began. No regressions.

## Coverage vs. Phase 3 Thresholds

| Threshold | Required | Measured | Status |
|-----------|---------:|---------:|--------|
| Overall line coverage | ≥ 75% | not measured | **deferred — see C19** |
| Critical-path coverage | ≥ 90% | not measured | **deferred — see C19** |
| Public API blackbox coverage | required | covered by 5 smoke + 6 deferred-to-`--full` integration tests | **PASS** |
| Error-path coverage | required | SEC-01..04 cover 4 explicit error paths; unit tests cover service-level error branches | **PASS** |

`baseline_metrics.md` documents that Coverlet is not wired up. Change **C19** in `list-of-changes.md` adds Coverlet + reportgenerator as a Phase 4 deliverable; coverage % becomes measurable after C19 lands. The user accepted this trade-off when confirming the Phase 0/Phase 2 roadmap.

## Mapping: Refactor Targets → Existing Test Coverage

| Refactoring change | Files refactored | Tests guarding the area |
|--------------------|------------------|-------------------------|
| C01 Null logger | `Program.cs` startup | smoke: any test that triggers the API container exercises startup; failure surfaces as container-down |
| C02..C04 Empty/silent catches | `TileService`, `TileRepository`, `RegionService` | unit tests for each service + smoke `RegionTests.RunRegionProcessingTest_200m_Zoom18` |
| C05 Throw-and-discard request body parser | `Program.cs` upload endpoint | not currently exercised by smoke; covered by SEC-04 (malformed JSON) and `--full` upload tests |
| C06..C09 Tile/Region/Route services | `TileService`, `RegionService`, `RouteService`, `GoogleMapsDownloaderV2` | `TileTests.RunGetTileByLatLonTest`, `RegionServiceTests`, `BasicRouteTests.RunSimpleRouteTest`, `ExtendedRouteTests.RunRouteWithTilesZipTest` |
| C10..C12 Magic numbers / enums | constants/enums consumers across services | covered transitively by all unit + smoke tests |
| C13..C15 Dapper / Postgres type handlers | repositories | unit tests for each repository + smoke region pipeline |
| C16..C18 Background services + queue | `RegionProcessingService`, `RouteProcessingService`, `RegionRequestQueue` | smoke region + route tests exercise the queue end-to-end |
| C19 Coverage tooling | build/test infrastructure only | tests themselves unchanged; verified by `scripts/run-tests.sh --smoke` exit code |
| C20 Tile version migration | `TileEntity`, `TileRepository`, migration | smoke `TileTests.RunGetTileByLatLonTest` re-uses tiles across runs; verifies read path |
| C21..C23 API surface (CORS, problem details, idempotency) | `Program.cs` endpoints | SEC-01..04 + smoke region/route POSTs |
| C24..C25 ImageSharp + ZIP utilities | shared utility modules | smoke `ExtendedRouteTests.RunRouteWithTilesZipTest` |
| C26 .editorconfig + analyzers | repo root config | non-functional; verified by build success |
| C27 dotnet format pre-commit | repo root tooling | non-functional; verified by manual hook invocation |

## Decisions

1. **Re-run scope**: smoke only. Full integration was green today and source has not changed since.
2. **Coverage threshold gating**: deferred to C19. The qualitative coverage check (every refactor target has at least one guarding test) passes for all 27 changes.
3. **Per-task test additions**: each refactor task spec already declares any new tests it must add. Those tests are written by the implement skill during Phase 4 execution.
4. **Re-verification trigger**: after each batch of refactor commits, the implement skill runs the relevant test subset; the full smoke suite must be green again before the next batch starts.

## Auto-chain decision

Phase 3 GATE cleared. Auto-chain to Phase 4 (Execution).
