59 lines
1.9 KiB
TypeScript
59 lines
1.9 KiB
TypeScript
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import { describe, it, expect } from 'vitest';
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import { albumNeighbours } from '@/lib/albumNav';
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const album = (id: string, slug = id, albumName = id.toUpperCase()) => ({ id, slug, albumName });
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const three = [album('a'), album('b'), album('c')];
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describe('albumNeighbours', () => {
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it('offers both neighbours in the middle of a list', () => {
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expect(albumNeighbours(three, 'b')).toEqual({
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prev: { href: '/a', name: 'A' },
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next: { href: '/c', name: 'C' },
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});
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});
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it('omits the previous link on the first album', () => {
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expect(albumNeighbours(three, 'a')).toEqual({ next: { href: '/b', name: 'B' } });
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});
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it('omits the next link on the last album — no wrap-around', () => {
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expect(albumNeighbours(three, 'c')).toEqual({ prev: { href: '/b', name: 'B' } });
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});
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it('prefixes hrefs with the subpage path when there is one', () => {
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expect(albumNeighbours(three, 'b', '/travel')).toEqual({
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prev: { href: '/travel/a', name: 'A' },
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next: { href: '/travel/c', name: 'C' },
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});
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});
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it('returns nothing for a single-album list', () => {
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expect(albumNeighbours([album('a')], 'a')).toEqual({});
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});
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it('returns nothing for an empty list', () => {
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expect(albumNeighbours([], 'a')).toEqual({});
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});
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it('returns nothing when the album is not in the list', () => {
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expect(albumNeighbours(three, 'zzz')).toEqual({});
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});
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it('follows list order, not slug or name order', () => {
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const shuffled = [album('c'), album('a'), album('b')];
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expect(albumNeighbours(shuffled, 'a')).toEqual({
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prev: { href: '/c', name: 'C' },
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next: { href: '/b', name: 'B' },
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});
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});
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it('uses the slug for the href and the display name for the label', () => {
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const list = [album('id-1', 'harbour-at-dawn', 'Harbour at Dawn'), album('id-2')];
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expect(albumNeighbours(list, 'id-2').prev).toEqual({
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href: '/harbour-at-dawn',
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name: 'Harbour at Dawn',
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});
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});
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});
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