FA-68097 / Traffic signal timing plans / Member archive

Time-of-day plan schedule: holidays are matched by day of month alone · case 02

Time-of-day plan schedule returns a wrong result when holidays are matched by day of month alone.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input {events: [[day mask (bit0 = Sunday), 'HH:MM', plan]], holidays: [[month, day, as_dow]], now: [dow, 'HH:MM', month, day]}. A holiday makes today's events come from its as_dow day type. The active plan is the event for today with the latest start <= now (later-listed wins at equal start). If none, the latest event of the most recent earlier real weekday that has events (up to 7 days back, same tie rule). Otherwise 'free'.

Why this case matters

Signal timing arithmetic is exact and integer or rational; a wrong rule silently produces unsafe or inefficient timing plans.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
timing oracle 0	`9`	`7`	Failed

MEMBER ARCHIVE

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