FR-RAW-2's "without changing callers" needs a test that would fail if a
caller named the concrete decoder; passing a real RAW through rawler
cannot tell the two apart, because both routes give the same answer.
The decoder_seam tests hand a stub decoder, for a container no real
decoder reads, to the catalog scan (read_metadata_only over a folder
backend), the preview ladder (the remote two-stage fetch, an import's
thumbnail and the viewer's no-GPU fallback) and export (open_for_export,
skipped without an adapter). Each assertion is on something only the
stub produces: its camera and date, a header fetched at its 64-byte
budget rather than HEADER_BYTES, preview and sensor sizes turned by its
orientation. Switching collect_metadata or make_thumbnail back to the
free functions fails two of the three tests.
The develop test_support module is widened to the crate so the export
test shares the one headless GPU context the other tests use. The
requirements note for FR-RAW-2 now records the trait as built and the
second decoder as not.
develop.rs had grown to 9,327 lines covering everything the develop
session does: opening a photograph, the parameter-row and curve-widget
panel model, mask viewing and editing, mask creation and the rasteriser
that turns a mask stack into GPU arrays, spot repairs, scene
segmentation, framing and zoom, white-balance sampling, rendering and
film choice, and the undo/snapshot history. docs/dev/code-health.md
CH-1 names dr-ui's lack of a view layer as the reason every feature
kept landing in a handful of files; this is the first of the two pure
splits it recommends as easy, no-behaviour-change wins independent of
that larger rework.
The boundaries follow the file's own sections (several were already
marked off with comment headers) and the seams a full read turned up
underneath them -- mask storage/rasterisation turned out to be a
distinct concern from mask viewing and editing, and rows/tabs/curves
from each other, so those split further than the headers alone
suggested. Each module stays under about 1,500 lines. Struct fields
and the handful of helper methods now called from a sibling module
became `pub(super)`, which is strictly narrower than the whole-crate
reachability a single file gave them; nothing gained visibility outside
`develop`. Tests moved with the code they test, including the few
cases where a helper one file's tests needed was itself only defined
in another's -- those became shared fixtures in `mod.rs` alongside the
`headless`/`read_back`/`grey_session` helpers that already worked that
way. `mod.rs` re-exports every item `develop::` callers outside this
module used before, so lib.rs, masks_ui.rs and the rest needed no
changes.
dtourolle