tests/test_stored_cache.py exercised two features that were never built,
so six of its tests had been failing on main. Both are now implemented.
Pad-factor caching. A padded view could not use a stored FFT cache at all:
the store was pad 1 by definition and cached_rf_image rejected any n_fft
outright, so a user working at a pad factor got nothing from batch-computing
a file. CACH tail v3 records the pad the images were resolved at, cache_file
computes at a requested pad, and the batch actions pass the viewer's own pad
down — while still refusing a store resolved at a different pad, since a
padded FFT interpolates between the natural bins and so resolves genuinely
different peak frequencies. v1/v2 tails read as pad 1 and keep working.
Stored-cache dispatch. _refresh_display only ever consulted this window's
in-session dicts, so after a batch every angle change still queued a worker
and a progress popup for an image already on disk — the exact cost the batch
was run to avoid. It now checks the file's own DC/FFT blocks first, asking
with allow_dc_recompute=False so the GUI thread never touches I/O. When the
stored cache genuinely cannot serve the view, the scan info panel says why
rather than leaving the silent recompute a mystery.
Two bugs surfaced on the way:
- The angle spinbox was wired on editingFinished, which QAbstractSpinBox
emits only on Return or focus-out — never on a step. Clicking its arrows,
the ordinary way to walk a scan, moved the number and left the image
behind. Now valueChanged with keyboard tracking off, which fires on a step
and once on commit, but not per keystroke mid-typing. Every existing GUI
test called _on_view_changed() by hand and so could not have caught this;
two new tests pin it and fail against the old wiring.
- A plain "fft" batch over a file previously cached with fft_rowavg carried
the old row_avg_n forward, labelling raw images as row-averaged. It now
writes row_avg_n=0 explicitly.
Verified: 111 passed (was 103 passed / 6 failed), and
tools/check_equivalence.py is byte-identical to the pre-change baseline.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Thomas Ales
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