System tests: OpenGD77 CPS file-level import → export round-trip against test-data

[pskillen]

Problem

CHIRP now has system tests that import committed test-data/chirp/<version>/<radio>/ fixtures through the internal codeplug model and assert file-level round-trip fidelity (multiset row compare; Location excluded because export reassigns slots). OpenGD77 should have the same guard.

Today OpenGD77 coverage is semantic (roundtrip.test.ts with stripIds()) and merge workflow (activeImport.system.test.ts with synthetic src/test/opengd77/ bundles). There is no committed real CPS export file-level diff after import → export.

Scope

• Add test-data/opengd77/<version>/… layout (mirror CHIRP pattern)
• System test: import OpenGD77 CPS folder → internal Codeplug → export all CSVs → compare each file to source
• Row/order rules: multiset compare where order is not guaranteed; document excluded columns (e.g. header-only DTMF/APRS, profile-specific truncation)
• Wire through runNewProjectImportWorkflow or dedicated harness beside src/test/system/chirpRoundTrip.system.test.ts

Reference

• CHIRP implementation: src/test/system/chirpRoundTrip.system.test.ts, src/test/csvRecordCompare.ts
• Checklist: docs/features/import-export/adding-a-new-vendor.md §4
• Related: feat: complete OpenGD77 CPS CSV import/export (Contacts, TG Lists, DTMF, APRS + full channel fields) #38 (OpenGD77 I/O), feat: CHIRP CSV import and export (analogue FM/AM) #103 (CHIRP — pattern source)

Acceptance

• At least one committed OpenGD77 fixture set under test-data/opengd77/
• System test runs in npm run test:system
• Documented column exclusions match reference lossy-field tables
• Fidelity matrix updated in docs/build/testing/format-fidelity.md

[pskillen]

Execution plan: OpenGD77 file-level round-trip — branch 108/paddy/opengd77-file-roundtrip.

Slice 0 (done): committed test-data/opengd77/r2025.02.23.01/ fixture (6 CSVs).

Next: test-data loader + csvRecordCompare generalisation → opengd77RoundTrip.system.test.ts → mapper fixes if needed → testing docs → PR Closes #108.