FA-68413 / Toll and parking fee computation / Member archive

Early bird flat rate: late evening exits keep the early bird · case 03

Early bird flat rate returns a wrong result when late evening exits keep the early bird.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input {entry: [day, minute], exit: [day, minute], hourly, daily_max, early}; day % 7 == 0 is Monday. Regular fee = min(started hours*hourly, started 24h periods (at least 1)*daily_max). Early bird applies on weekdays when entry is 06:00-09:00 inclusive and exit is the same day 15:00-19:00 inclusive; the customer pays min(regular, early). Negative durations are 'invalid'.

Why this case matters

Fee engines bill customers in integer cents; a wrong boundary, rounding stage or cap scope silently over- or under-charges.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fee oracle 0	`1000`	`1200`	Failed

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