FA-66485 / Airline fare rule evaluation / Member archive

Age taken as the difference of calendar years · case 05

A child travelling the day before the 12th birthday is priced as an adult.

Member previewVariant 5 · 3 implementations · 12 checks per implementation

Case contract

Input {'birth','depart' ISO dates,'fare'}. Age is completed years on the departure date; a 29 February birthday falls on 1 March in non-leap years. Under 2 -> INF 10%; 2 to 11 -> CHD 75%; otherwise ADT 100%. Amount = fare*pct/100 rounded half-up to cents. Return [ptc, amount].

Why this case matters

Passenger type discounts depend on exact age at travel, with birthday and leap-day edge cases and currency rounding.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
child day before 12th birthday	`["ADT", 412.5]`	`["CHD", 309.38]`	Failed

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