36 lines
1.4 KiB
TypeScript
36 lines
1.4 KiB
TypeScript
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import { describe, it, expect } from 'vitest';
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import { lastDays } from '../components/analyticsDays';
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/**
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* "Last 14 Days" used to show the last 14 days that had any views, so quiet
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* days vanished and the chart could span a month (QA A-16).
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*/
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describe('lastDays', () => {
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const days = {
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'2026-08-28': { pageviews: 4 },
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'2026-09-20': { pageviews: 6 },
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'2026-09-29': { pageviews: 16 },
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};
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it('returns every calendar day up to today, with 0 for days without views', () => {
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const out = lastDays(days, 14, new Date('2026-09-29T12:00:00Z'));
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expect(out).toHaveLength(14);
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expect(out[0]).toEqual({ date: '2026-09-16', pageviews: 0 });
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expect(out[4]).toEqual({ date: '2026-09-20', pageviews: 6 });
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expect(out[13]).toEqual({ date: '2026-09-29', pageviews: 16 });
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// Older recorded days are outside the window, not pulled into it.
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expect(out.find((d) => d.date === '2026-08-28')).toBeUndefined();
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});
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it('counts days in UTC, the way the tracker keys them', () => {
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// 23:30 UTC on the 29th is already the 30th in Berlin.
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const out = lastDays(days, 2, new Date('2026-09-29T23:30:00Z'));
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expect(out.map((d) => d.date)).toEqual(['2026-09-28', '2026-09-29']);
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});
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it('crosses a month boundary without skipping or repeating a day', () => {
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const out = lastDays({}, 3, new Date('2026-10-01T00:00:00Z'));
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expect(out.map((d) => d.date)).toEqual(['2026-09-29', '2026-09-30', '2026-10-01']);
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});
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});
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