Jeffrey (Dongkyu) Kim 7a0cefb832 Cover NCard error branches ...

Add regression coverage for missing NCard package handling and zero-based NCard selection so the KTX helper keeps clear failures around optional korail2-ncard support.

Constraint: PR #231 adds optional NCard behavior that must still be safe when korail2-ncard is not installed.

Rejected: Changing runtime NCard behavior now | existing implementation already returns explicit SystemExit messages and only lacked regression coverage.

Confidence: high

Scope-risk: narrow

Directive: Keep NCard fallback behavior tested separately from normal korail2 imports.

Tested: python3 -m pytest scripts/test_ktx_booking.py -q

Not-tested: Live Korail NCard reservation against production account.

2026-05-12 19:09:45 +09:00

20 KiB

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