isWritableDirectory (permissions bits) is not enough: a OneDrive
Files-On-Demand directory whose provider domain is signed out can report as
existing and POSIX-writable while an actual write fails. probeWritable
writes a small ".redline-probe-<uuid>" file into the folder via
AtomicFile.write (open+write+fsync+rename+directory-fsync), then removes it;
any failure at write, fsync, or removal means false.
Three unit tests: an ordinary writable directory (true, and no probe file
left behind), a chmod 500 directory (false; permissions restored in
teardown), and a plain file path (false).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012ZiTXPbPCSjzPVsfoweAbp
ReturnWatcherTests.swift: two new tests bracket the BLOCKER fix — one
characterizes the old bug (FolderSettings.resolvedAppSupportPaths(), AirDrop-
only, ignores the persisted OneDrive transport; the watcher ends up watching
a stale isolated folder and misses a marked PDF dropped into the real
OneDrive-mode folder), the other proves the fix (the exact launch/bootstrap
construction — TransportSettings.resolvedAppSupportPaths() +
watcher.updateWatchFolder() before start — detects it). Both isolated to
temp dirs, including an explicit FolderSettings watch-folder override so the
"bug" test's found.isEmpty assertion never depends on what's actually in
Ben's real ~/Downloads (it does, in fact, already contain real marked-up
Redline PDFs from prior testing — an earlier version of this test read the
REAL Downloads folder and failed for exactly that reason).
TransportSettingsTests.swift: three tests for
OneDriveLocator.isWritableDirectory — true for an ordinary directory, false
for one chmod'd 500 (permissions restored in teardown before removal), false
for a plain file and for a nonexistent path.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012ZiTXPbPCSjzPVsfoweAbp
TransportSettingsTests: default airDrop, set/get round-trip, garbage stored
value falls back to airDrop, oneDriveFolder store/reset, effectiveFolders for
both transports, oneDriveFolderUnavailable's errorDescription contains the path.
OneDriveLocatorTests: fake home tree under Library/CloudStorage — syncRoots
returns only real OneDrive-* directories (ignores a same-named plain file and
a GoogleDrive-* one), MMD-named root sorts first; no CloudStorage dir means
empty roots and a nil defaultRedlineFolder; resolveOneDriveFolder prefers an
existing stored override and falls back to the default when the stored path
no longer exists. All against temp dirs, never the real home.
ReturnWatcherTests: recordUncommended defaults to true and still records an
unmarked PDF (existing AirDrop tests are unaffected); with it set false, an
unmarked PDF is neither recorded nor returned by scanNow, and marking it up
in place with a real PDFKit ink annotation then re-scanning does record it.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012ZiTXPbPCSjzPVsfoweAbp
kua-agentandClaude Fable 5.1