The genuine-conflict branch in applyPullActions resolves to `ours ?? theirs`,
but the two stages where a side is ABSENT had NO test — the existing conflict
tests only fed stages where both ours and theirs are non-null. This is the
data-preservation core on the published `main`: a regression (dropping the
`?? theirs`, or wrongly writing on both-null) would silently lose a surviving
Docmost edit or resurrect a both-deleted page.
Adds four tests:
- apply-pull-actions.test.ts (fake-git, controlled stages): modify/delete
(ours=null, theirs!=null -> keep THEIRS) and delete/delete (both null ->
write nothing, deletion staged by commitMerge's `git add -A`).
- pull-conflict-normalize.test.ts (real-git 3-way): modify/delete built by
deleting on main + modifying on docmost (stage 2 absent -> theirs kept,
committed clean, no markers); delete/delete built via a rename/rename(1to2)
on the shared base file, which records the original path as both-deleted
(stages 2 AND 3 absent -> nothing written, deletion committed off main).
Production logic at pull.ts:487-497 held — pure test-coverage fix.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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