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Clifford GarwoodandClaude Opus 4.7
cb15f35444
Validates that imex_parallel_mode and imex_head_filament_map survive a
full store_bbs_3mf → load_bbs_3mf cycle — the same silent-state-loss bug
class that produced the variant-vector truncation regression, applied to
IMEX plate state which rides the same XML metadata path.
- Positive round-trip: a plate with copy_mode + a non-trivial head
filament map ("1:2,2:3") is saved and reloaded; both options land on
the destination plate's config with the exact values preserved.
- Guard scope: a plate with mode="primary" and empty head-filament-map
does NOT emit metadata (per the serializer's short-circuit), and the
reload leaves both options absent from the destination config. If the
serializer ever regressed to writing primary-mode plates, the load
path would surface phantom "primary" strings on plates that shipped
clean — this catches that.
Both scenarios call set_temporary_dir to point the BBS exporter's backup
scaffolding at a writable per-process temp directory (by default it
resolves under root at runtime, which fails for non-root test
processes).
All 27 assertions in 2 test cases pass under [3mf][IMEX].
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>