Chris Troutner dd11964174 Refactor topic metadata: cut CRAP, share test doubles, harden property tests ...

- Replace the ternary follower delta in recordTopicFollow with
  Number(isActive) - Number(wasActive), dropping its cyclomatic complexity
  from 8 to 6 (CRAP 8.0 -> 6.0). No behavior change.
- Extend the indexer topic property test to conserve lastSeen (newest post
  time) and followerCount (each address's final active follow state)
  alongside postCount/lastHeight, with varying post seen times.
- Extend the DB backfill and topic-query property tests to conserve lastSeen
  and followerCount; generated follows now include unfollows.
- Add a client topic-metadata property test covering relativeTime bucket
  classification, pluralization, monotonicity, and getLastSeenLabel
  consistency, and cover ensureTopicRoom's existing-summary path plus
  recordTopicFollow's legacy-follower-count fallback.
- Share one in-memory DB double per component (indexer test/support/
  memory-db.js, DB test/support/level-double.js) and table-drive the
  parallel topic-follow/topic-message/topic-query cases, clearing every
  dry4javascript candidate in the changed files.

Verification: indexer 113 unit / 12 property / 7 acceptance; db 387 unit /
57 property / 16 acceptance; client 441 unit / 90 property / 33 acceptance
+ build; lint clean. CRAP max 6.0; mutation scans under 100 sites/file.

By refactorer.

2026-09-18 06:02:13 -07:00

..

level-double.js

Refactor topic metadata: cut CRAP, share test doubles, harden property tests

2026-09-18 06:02:13 -07:00