Task #3 — Unit tests for ptree and pintervaltree
tests/unit-tests/test_ptree.c: 8 tests covering single-node insert,
in-order traversal after arbitrary and reverse inserts, BST lookup,
leaf/root/all-node deletion, and ptree_for_each visitation.
tests/unit-tests/test_pintervaltree.c: 18 tests covering single add,
non-overlapping, overlapping/adjacent/contained/spanning merges,
chain merge, remove middle split, remove exact/left/right/spanning,
cut_end, first_interval_containing_or_after, and free(NULL).
Task #4 — Extract pfstasks tree layer
pclsync/pfstasks_tree.h + pclsync/pfstasks_tree.c: pure tree layer
(zero psql calls) extracted from pfstasks.c — pfs_task_search_tree,
pfs_task_walk_tree (static helpers), pfs_task_insert_into_tree,
pfs_task_find_mkdir/rmdir/creat/unlink,
pfs_task_find_mkdir_by_folderid, pfs_task_find_creat_by_fileid.
pclsync/pfstasks.c: #includes pfstasks_tree.h; all moved functions
removed; all callers unchanged.
tests/unit-tests/test_pfstasks_tree.c: 13 tests using direct tree
construction (no DB) to verify find-by-name, taskid discrimination,
find-by-numeric-id, and empty-folder edge cases.
Task #5 — psql in-memory harness + pfstasks DB tests
tests/helpers/psql_test_helpers.h + .c: lightweight harness that
opens :memory: via sqlite3_open, enables PRAGMA foreign_keys=ON, and
applies the full PSYNC_DATABASE_STRUCTURE schema. Exposes
psql_test_db(), psql_test_exec(), psql_test_insert_fstask(),
psql_test_count_fstask/fstaskdepend(). No dependency on psql.c.
tests/unit-tests/test_pfstasks_db.c: 10 tests verifying schema
creation, fstask insertion/query, fstaskdepend insertion, CASCADE
DELETE propagation, FK enforcement, rmdir-blocking SQL pattern,
creat-after-unlink sequencing, and open/close idempotence.
All 11 new tests pass; production build clean.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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