FA-66595 / Airline fare rule evaluation / Member archive

Departure tax keyed on the arrival country · case 05

A flight into London is charged the UK departure tax, and the flight out is not.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Input {'base','yq','segments':[[from country, to country]],'pct_tax':{country: %},'dep_tax':{country: flat}}. The percentage tax of the journey origin (first segment departure country) applies once to the base fare only; each segment pays the flat departure tax of its departure country plus YQ. Return total r2.

Why this case matters

Ticket taxes differ in base and trigger: some are percentage of fare at origin, others are per departure, and carrier surcharges are per segment.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
GB origin no pct tax	`57.0`	`71.0`	Failed

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