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Post-Pentecost overflow years (early Easter, fewer than 6 Sundays after Epiphany fit before Septuagesima) previously clamped every excess Sunday to post-pentecost-24 instead of resuming the skipped post-Epiphany Sundays' own content, per the traditional rubric. Ported directly from the reference engine's own DivinumOfficium/Date.pm getweek(). Also adds the Epiphany VI Saturday-before-Septuagesima commemoration (only when Epiphany V was the last Sunday to actually occur), and fixes day-label.ts's on-screen display to track the same resumed-Sunday content instead of a raw elapsed-week count — including a correction so the fixed final Sunday of the year always reads "23rd Sunday after Trinity", not a per-year-varying number. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
41 lines
2.0 KiB
TypeScript
41 lines
2.0 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import { resolveTemporalId } from '../../src/calendar/temporal-id';
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import { resolveDay } from '../../src/calendar';
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describe('resolveTemporalId — post-Pentecost overflow', () => {
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// 2026: Easter 2026-04-05 -> only post-epiphany-1..5 occur before
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// Septuagesima, so post-pentecost-24 through 27 (5 real weeks between
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// XXIII and the last Sunday) resume as Epiphany V and VI before landing
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// on the fixed final Sunday. Confirmed against the reference engine's
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// own DivinumOfficium/Date.pm getweek() (Pent/Epi arithmetic), not just
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// hand-derived.
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it('resumes the skipped post-Epiphany Sundays in order before the fixed last Sunday', () => {
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expect(resolveTemporalId('2026-11-07')).toBe('post-pentecost-23');
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expect(resolveTemporalId('2026-11-14')).toBe('post-epiphany-5');
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expect(resolveTemporalId('2026-11-21')).toBe('post-epiphany-6');
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expect(resolveTemporalId('2026-11-28')).toBe('post-pentecost-24');
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});
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it('does not resume anything in a non-overflow year (all 6 post-Epiphany Sundays occurred)', () => {
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// 1943: Easter 1943-04-25, latest possible-ish Easter -> all 6
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// post-Epiphany Sundays occur, so post-pentecost climbs past 24
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// without ever touching Epiphany content, capping at the fixed id.
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expect(resolveTemporalId('1943-11-21')).toBe('post-pentecost-24');
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});
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});
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describe('post-Epiphany VI commemoration on the Saturday before Septuagesima', () => {
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it('fires only when Epiphany V was the last Sunday to occur (2022, 2025)', () => {
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const day2022 = resolveDay('2022-02-12');
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expect(day2022.commemorations).toContainEqual({ kind: 'temporal', id: 'post-epiphany-6' });
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const day2025 = resolveDay('2025-02-15');
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expect(day2025.commemorations).toContainEqual({ kind: 'temporal', id: 'post-epiphany-6' });
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});
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it('does not fire when all 6 post-Epiphany Sundays occurred (1943)', () => {
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const day = resolveDay('1943-02-20');
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expect(day.commemorations).not.toContainEqual({ kind: 'temporal', id: 'post-epiphany-6' });
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});
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});
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