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+> Mirrored from `/mnt/DATA/git/pikebacker/docs/14_testing_plan.md`.
+> Origin: `repository`.
+> Active tasks and changing state belong in Gitea issues; this wiki page is durable project context.
+
+---
+# Testing Plan
+
+## Unit tests
+
+### Scoring
+
+- penalizes steep loose climbs for loaded gravel profile;
+- allows rougher segments for hardtail profile;
+- penalizes unknown access;
+- rewards official cycle routes;
+- increases severity for long water gaps;
+- detects no sleep options near target endpoint.
+
+### Staging
+
+- splits route into daily ranges;
+- avoids impossible climbing days;
+- chooses endpoints with sleep candidates;
+- produces Plan B endpoints;
+- rebalances when one day exceeds constraints.
+
+### POI corridor
+
+- finds POIs within buffer;
+- sorts by distance along route;
+- deduplicates overlapping sources;
+- computes detour distance;
+- respects category filters.
+
+### Offline manifest
+
+- includes required layers;
+- records source versions;
+- flags stale data;
+- supports report sync queue.
+
+## Integration tests
+
+- route planning provider returns normalized geometry;
+- stage planner consumes route geometry and POIs;
+- GPX export round-trips with common viewers;
+- API returns consistent warnings from fixtures;
+- map renders route/stages/POIs.
+
+## Fixture tests
+
+Use sample fixtures in `examples/`:
+
+- simple 2-day route,
+- remote route with water gap,
+- route with uncertain access,
+- route with sleep endpoints,
+- route with steep rough segment.
+
+## Manual QA scenarios
+
+1. Plan 3-day trip with campsites only.
+2. Plan 5-day trip with indoor sleep every third night.
+3. Import GPX and ask app to stage it.
+4. Download offline pack and simulate airplane mode.
+5. Submit water-unavailable report offline and sync later.
+6. Export GPX and import into Garmin Connect or another route viewer.
+7. Check that legal/rule warnings show source and uncertainty.