Opening versicle; Ps 66 (fixed, no antiphon at all); the weekday- variable psalm groups (Ps 50 plus 1-2 more, framed by their own antiphon each, wholesale-substituted by Sunday's Ps 50+117-share-one- antiphon shape); the weekday OT canticle; the Laudate psalms (148-150) under one more shared antiphon; the weekday chapter/responsory/hymn/ versicle bundle; the Benedictus (framed by a day-resolved antiphon, same incipit-or-full/full-repeat shape as Compline's Nunc Dimittis); the Kyrie/Pater-noster short litany; the day's collect(s) — winner plus one per commemoration, via the new getDayCollects; the four Tridentine suffrages (omitted on a Double-or-higher feast); the conclusio; the closing versicle (the silent Our Father that precedes it isn't re-rendered, its text having already appeared once at the short litany); and the closing Marian antiphon, reusing Compline's own mechanism exactly. Known, deliberate gap, not yet fixed: the psalmody doesn't model the Commune/feast override real practice applies on a Semiduplex-or-higher day (substituting an entirely different psalm+canticle set) — every day currently gets the plain ferial weekday distribution regardless of who wins. That's a separate, larger propers-authoring task (a full Common-of-Saints psalm set per Common). Also a simplification in getDayCollects: each collect in a multi- collect day renders as its own complete "Let us pray ... Amen." block, rather than the more compressed real form (one "Let us pray," only the last collect's doxology). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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import { describe, expect, it } from 'vitest';
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import { resolveOrdo } from '../../src/hours';
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// Clean ferial dates, one per weekday — see data/psalter-distribution.yml
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// and src/hours/lauds.ts's own generation-script provenance comments for
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// why these particular dates.
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const FERIAL_SUNDAY = '2026-06-21';
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const FERIAL_MONDAY = '2026-08-31';
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const FERIAL_TUESDAY = '2026-06-16';
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const LAWRENCE_OCTAVE_DAY = '2026-08-11'; // Semiduplex -- exercises isDoubleOrHigher's false branch differently than a plain feria only in rank, not in psalms (Commune override not modeled, see below)
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describe('resolveOrdo("lauds", ...)', () => {
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it('is implemented', () => {
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expect(resolveOrdo('lauds', FERIAL_TUESDAY).notImplemented).toBeUndefined();
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});
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it('opens with Ps 66 and gives it no antiphon at all, unlike every other psalm here', () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const psalms = ordo.parts.filter((p) => p.kind === 'psalm');
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expect(psalms[0]?.kind === 'psalm' ? psalms[0].psalmNumber : undefined).toBe(66);
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expect(psalms[0]?.kind === 'psalm' ? psalms[0].antiphon : 'should be undefined').toBeUndefined();
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});
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it("resolves Tuesday's weekday psalmody: Ps 50, 42, 56, the Canticle of Ezechias, then 148-150", () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const psalmNumbers = ordo.parts
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.filter((p) => p.kind === 'psalm')
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.map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
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expect(psalmNumbers).toEqual([66, 50, 42, 56, 148, 149, 150]);
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const canticle = ordo.parts.find((p) => p.kind === 'canticle' && p.canticleId !== 'benedictus');
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expect(canticle?.kind === 'canticle' ? canticle.canticleId : undefined).toBe('canticum-ezechiae');
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expect(canticle?.kind === 'canticle' ? canticle.text.text.la : undefined).toContain('In dimídio diérum meórum');
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});
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it("gives each variable psalm group its own opening antiphon (incipit, below Double) and a full repeat right after", () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const ps50Index = ordo.parts.findIndex((p) => p.kind === 'psalm' && p.psalmNumber === 50);
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const ps50 = ordo.parts[ps50Index];
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expect(ps50?.kind === 'psalm' ? ps50.antiphon?.text.la : undefined).toBe('Ant. Dele, Dómine.');
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const repeat = ordo.parts[ps50Index + 1];
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expect(repeat?.kind).toBe('antiphon');
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expect(repeat?.kind === 'antiphon' ? repeat.text.text.la : undefined).toBe('Ant. Dele, Dómine, * iniquitátem meam.');
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});
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it("resolves Sunday's own psalmody: Ps 50+117 sharing one antiphon, then 62, then the Canticle of the Three Young Men", () => {
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const ordo = resolveOrdo('lauds', FERIAL_SUNDAY);
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const psalmNumbers = ordo.parts
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.filter((p) => p.kind === 'psalm')
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.map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
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expect(psalmNumbers).toEqual([66, 50, 117, 62, 148, 149, 150]);
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const ps117 = ordo.parts.find((p) => p.kind === 'psalm' && p.psalmNumber === 117);
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expect(ps117?.kind === 'psalm' ? ps117.antiphon : 'should be undefined -- shares Ps 50s opening antiphon').toBeUndefined();
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const canticle = ordo.parts.find((p) => p.kind === 'canticle' && p.canticleId !== 'benedictus');
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expect(canticle?.kind === 'canticle' ? canticle.canticleId : undefined).toBe('canticum-trium-puerorum');
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});
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it("resolves Saturday's own psalmody: only one weekday psalm (142), and the Canticle of Moses split across two D.O. slots joins into one continuous canticle", () => {
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// Any Saturday works here: lauds-psalmody doesn't yet model the
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// Commune/feast override real practice would apply on a Marian-
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// Sabbato Saturday (see hours/types.ts's 'lauds-psalmody' doc comment)
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// -- the plain weekday distribution is always used, so this is
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// exercising the real, current behavior, not a stand-in for it.
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const ordo = resolveOrdo('lauds', '2026-06-20');
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const psalmNumbers = ordo.parts
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.filter((p) => p.kind === 'psalm')
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.map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
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expect(psalmNumbers).toEqual([66, 50, 142, 148, 149, 150]);
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const canticle = ordo.parts.find((p) => p.kind === 'canticle' && p.canticleId !== 'benedictus');
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expect(canticle?.kind === 'canticle' ? canticle.canticleId : undefined).toBe('canticum-moysis-deuteronomii');
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expect(canticle?.kind === 'canticle' ? canticle.text.text.la : undefined).toContain('Audíte, cæli');
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});
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it('gives the Laudate psalms (148-150) one shared antiphon, opening before 148 and repeated in full after 150', () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const ps148Index = ordo.parts.findIndex((p) => p.kind === 'psalm' && p.psalmNumber === 148);
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const ps149 = ordo.parts[ps148Index + 1];
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const ps150 = ordo.parts[ps148Index + 2];
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expect(ps149?.kind === 'psalm' ? ps149.antiphon : 'should be undefined').toBeUndefined();
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expect(ps150?.kind === 'psalm' ? ps150.antiphon : 'should be undefined').toBeUndefined();
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const repeat = ordo.parts[ps148Index + 3];
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expect(repeat?.kind).toBe('antiphon');
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expect(repeat?.kind === 'antiphon' ? repeat.text.text.en : undefined).toContain(
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'Praise ye the Lord * from the heavens, all His angels',
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);
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});
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it("resolves the weekday chapter/responsory/hymn/versicle bundle, sharing the same capitulum Mon-Fri", () => {
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const tue = resolveOrdo('lauds', FERIAL_TUESDAY);
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const mon = resolveOrdo('lauds', FERIAL_MONDAY);
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const tueChapter = tue.parts.find((p) => p.kind === 'chapter');
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const monChapter = mon.parts.find((p) => p.kind === 'chapter');
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expect(tueChapter?.kind === 'chapter' ? tueChapter.text.citation?.en : undefined).toBe('Rom 13:12-13');
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expect(tueChapter?.kind === 'chapter' ? tueChapter.text.text.la : undefined).toBe(
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monChapter?.kind === 'chapter' ? monChapter.text.text.la : undefined,
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);
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const responsory = tue.parts.find((p) => p.kind === 'responsory');
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expect(responsory?.kind === 'responsory' ? responsory.text.text.la : undefined).toContain('Sana ánimam meam');
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const hymn = tue.parts.find((p) => p.kind === 'hymn');
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expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('Ales diéi núntius');
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});
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it("marks Saturday's hymn honestly missing rather than presenting a privileged season's swapped hymn as the default", () => {
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const ordo = resolveOrdo('lauds', '2026-06-20');
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const hymn = ordo.parts.find((p) => p.kind === 'hymn');
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expect(hymn?.kind === 'hymn' ? hymn.text.status.la : undefined).toBe('missing');
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});
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it('resolves the Benedictus as a canticle with an opening antiphon and a full repeat, same shape as Compline\'s Nunc Dimittis', () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const canticleIndex = ordo.parts.findIndex((p) => p.kind === 'canticle' && p.canticleId === 'benedictus');
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const canticle = ordo.parts[canticleIndex];
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expect(canticle?.kind === 'canticle' ? canticle.text.text.en : undefined).toContain('Blessed be the Lord');
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const repeat = ordo.parts[canticleIndex + 1];
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expect(repeat?.kind).toBe('antiphon');
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});
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it("falls back to a missing Benedictus antiphon on a plain temporal day (no per-Sunday antiphon authored yet)", () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const canticle = ordo.parts.find((p) => p.kind === 'canticle' && p.canticleId === 'benedictus');
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expect(canticle?.kind === 'canticle' ? canticle.antiphon?.status?.la : undefined).toBeUndefined();
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});
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it("resolves a real Benedictus antiphon on St. Lawrence's own octave day, from the saint's already-authored proper", () => {
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const ordo = resolveOrdo('lauds', '2026-08-10'); // St. Lawrence's own day
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const canticle = ordo.parts.find((p) => p.kind === 'canticle' && p.canticleId === 'benedictus');
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expect(canticle?.kind === 'canticle' ? canticle.antiphon?.text.la : undefined).toContain('Levíta Lauréntius');
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});
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it('includes the short litany (Kyrie + Our Father) right after the Benedictus, before the day collect', () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const litanyIndex = ordo.parts.findIndex((p) => p.kind === 'preces' && p.text.text.la?.includes('Kýrie, eléison'));
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const benedictusIndex = ordo.parts.findIndex((p) => p.kind === 'canticle' && p.canticleId === 'benedictus');
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const collectIndex = ordo.parts.findIndex((p) => p.kind === 'prayer');
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expect(litanyIndex).toBeGreaterThan(benedictusIndex);
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expect(collectIndex).toBeGreaterThan(litanyIndex);
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});
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it('resolves just the winners own collect on a plain day with nothing commemorated', () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const collects = ordo.parts.filter((p) => p.kind === 'prayer');
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expect(collects.length).toBe(1);
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});
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it('resolves both the winners collect and a commemorated saints collect on a day with a real commemoration', () => {
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// 2025-11-30: Advent I (the winner) with St. Andrew, Duplex II. classis,
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// commemorated alongside it (see tests/calendar/day-label.test.ts) --
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// an octave commemoration (like LAWRENCE_OCTAVE_DAY's) never
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// contributes a collect (none authored yet), so this needs a real
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// sanctoral/temporal commemoration instead to exercise getDayCollects
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// pushing a second entry.
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const ordo = resolveOrdo('lauds', '2025-11-30');
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const collects = ordo.parts.filter((p) => p.kind === 'prayer');
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expect(collects.length).toBe(2);
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expect(collects[1]?.kind === 'prayer' ? collects[1].text.text.en : undefined).toContain('Andrew');
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});
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it("skips a straight octave commemoration for collect purposes (no octave collect authored)", () => {
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const ordo = resolveOrdo('lauds', LAWRENCE_OCTAVE_DAY);
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const collects = ordo.parts.filter((p) => p.kind === 'prayer');
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expect(collects.length).toBe(1);
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});
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it('includes all four Tridentine suffrages, in order, on an ordinary day', () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const labels = ordo.parts.filter((p) => p.kind === 'preces' && p.label).map((p) => (p.kind === 'preces' ? p.label : undefined));
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expect(labels).toEqual([
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'Of the Holy Cross',
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'Of the Blessed Virgin Mary',
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'Of the Holy Apostles Peter and Paul',
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'For Peace',
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'Salve Regina',
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]);
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});
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it('omits the suffrages on a Double-or-higher feast', () => {
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const ordo = resolveOrdo('lauds', '2026-08-10'); // St. Lawrence, Duplex II. classis
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const crossSuffrage = ordo.parts.find((p) => p.kind === 'preces' && p.label === 'Of the Holy Cross');
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expect(crossSuffrage).toBeUndefined();
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});
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it('closes with the Conclusio, the closing versicle ("may the Lord grant us his peace... and life everlasting"), and the Marian antiphon -- without spelling out the silent Our Father', () => {
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const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
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const closingVersicle = ordo.parts.find(
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(p) => p.kind === 'versicle' && p.text.text.en?.includes('grant us his peace'),
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);
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expect(closingVersicle?.kind === 'versicle' ? closingVersicle.text.text.en : undefined).toContain(
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'life everlasting',
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);
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expect(closingVersicle?.kind === 'versicle' ? closingVersicle.text.text.en : undefined).not.toContain(
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'Our Father',
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);
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const last = ordo.parts[ordo.parts.length - 1];
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expect(last?.kind).toBe('preces');
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expect(last?.kind === 'preces' ? last.label : undefined).toBe('Salve Regina');
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});
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});
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