Frontend (90.15→95.37 stmts / 91.83→97.01 lines):
- useDeviceMercure: full composable test suite via a fake EventSource —
open/merge/ignore-stale/parse-error/reconnect/dynamic-add/remove/
no-op-when-unconfigured/cleanup-on-unmount.
- HomeView: cover onTimePart's AM/PM and minute branches plus the
nextPollExpectedAt-null fallback paths in the next-update preview.
Backend (no instrumentation before; pcov was already in the image,
just needed a <coverage> block in phpunit.dist.xml):
- RotationService: one test per mode (NewestUpload, Random,
LeastRecentlyShown), one for never-shown sorting first under LRS,
and two for prioritizeNeverShown — narrows when never-shown exists,
falls through to mode otherwise.
- DeviceSerializer: contract test on the wire shape (REST + Mercure
use the same serializer; silent rename here would break live updates
instantly).
- MercurePublisher: topic format + JSON encoding + the swallow-
exceptions guarantee (a flaky hub must not break poll responses).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
