will
67037469fc
resolveDay() no longer hardcodes season: 'trinitytide'. Easter is computed via the Anonymous Gregorian algorithm (verified against 16 known reference dates spanning 1583-2100); Advent/Christmastide/ Epiphanytide follow the Christmas-anchored rules (including Advent's "Sunday nearest Nov 30"); Septuagesima through Trinitytide come from easter-offsets.yml, reshaped from single named anchor points into real ranges plus single-day overrides for Corpus Christi and Sacred Heart. occurring feasts (calendar/feasts.ts) are still a stub — the sanctoral calendar and Double-vs-not ranking are a separate, larger project.
55 lines
2.6 KiB
TypeScript
55 lines
2.6 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import { resolveSeason } from '../../src/calendar/temporal';
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// Easter 2026 = Apr 5. Reference boundaries computed by hand from that.
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describe('resolveSeason', () => {
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it('resolves Advent (the Sunday nearest Nov 30) through Dec 24', () => {
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// Nov 30, 2025 is a Sunday -> Advent I starts that day.
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expect(resolveSeason('2025-11-29')).toBe('trinitytide');
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expect(resolveSeason('2025-11-30')).toBe('advent');
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expect(resolveSeason('2025-12-24')).toBe('advent');
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});
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it('resolves Christmastide across the year boundary (Dec 25 - Jan 5)', () => {
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expect(resolveSeason('2025-12-25')).toBe('christmastide');
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expect(resolveSeason('2025-12-31')).toBe('christmastide');
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expect(resolveSeason('2026-01-01')).toBe('christmastide');
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expect(resolveSeason('2026-01-05')).toBe('christmastide');
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});
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it('resolves Epiphanytide from Jan 6 until Septuagesima', () => {
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expect(resolveSeason('2026-01-06')).toBe('epiphanytide');
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// Easter 2026 is Apr 5, so Septuagesima (-63 days) is Feb 1.
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expect(resolveSeason('2026-01-31')).toBe('epiphanytide');
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});
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it('resolves the Easter-offset seasons for 2026 (Easter = Apr 5)', () => {
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expect(resolveSeason('2026-02-01')).toBe('septuagesima'); // Easter - 63
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expect(resolveSeason('2026-02-18')).toBe('lent'); // Ash Wednesday, Easter - 46
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expect(resolveSeason('2026-03-22')).toBe('passiontide'); // Easter - 14
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expect(resolveSeason('2026-04-05')).toBe('eastertide'); // Easter Sunday
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expect(resolveSeason('2026-05-14')).toBe('ascensiontide'); // Easter + 39
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expect(resolveSeason('2026-05-24')).toBe('pentecost'); // Easter + 49
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expect(resolveSeason('2026-05-31')).toBe('trinitytide'); // Easter + 56
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});
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it('resolves the Corpus Christi and Sacred Heart single-day overrides', () => {
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expect(resolveSeason('2026-06-04')).toBe('corpus-christi'); // Easter + 60
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expect(resolveSeason('2026-06-12')).toBe('sacred-heart'); // Easter + 68
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// The days immediately around them are still plain Trinitytide.
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expect(resolveSeason('2026-06-05')).toBe('trinitytide');
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});
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it('resolves plain Trinitytide between Trinity Sunday and Advent', () => {
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expect(resolveSeason('2026-09-15')).toBe('trinitytide');
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});
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it('never needs a cross-year Easter lookup for January dates', () => {
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// A year with a very early Easter (2027-03-28) still keeps Septuagesima
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// (Jan 24) safely after Epiphany (Jan 6).
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expect(resolveSeason('2027-01-06')).toBe('epiphanytide');
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expect(resolveSeason('2027-01-23')).toBe('epiphanytide');
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expect(resolveSeason('2027-01-24')).toBe('septuagesima');
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});
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});
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