FA-66419 / Airline fare rule evaluation / Member archive

Weekday codes read with zero-based Monday · case 04

Weekend-only summer fares match Friday and Saturday instead of Saturday and Sunday.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

Input {'date','seasons':[[start 'M-D', end 'M-D' (unpadded allowed), weekdays string of ISO digits 1=Mon..7=Sun, code]]}. A season with start after end wraps the year end. Both ends inclusive. Return the code of the first season (list order) containing the date on an allowed weekday, else 'NONE'.

Why this case matters

Fare seasonality tables use month-day ranges that can wrap the year boundary and are further restricted by day of week.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
autumn weekday	`"SHOULDER"`	`"NONE"`	Failed

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