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Aculix Technologies
e81e7ef8e7
Switches task keys to ISO YYYY-MM-DD. They sort, so finding every day before today is a string compare instead of re-parsing each key. Two things worth knowing. fromKey builds from date parts rather than parsing a bare ISO string, which gets read as UTC and lands on the wrong day west of Greenwich. addDays goes through setDate, so it stays on the same calendar day across a DST change instead of adding a flat 24 hours.
90 lines
2.4 KiB
JavaScript
90 lines
2.4 KiB
JavaScript
import { describe, it, expect } from 'vitest'
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import { toKey, fromKey, addDays, isKey, labelFor, formatLong } from './dates.js'
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describe('toKey', () => {
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it('formats a date as local YYYY-MM-DD', () => {
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expect(toKey(new Date(2026, 7, 15))).toBe('2026-08-15')
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})
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it('zero-pads single-digit months and days', () => {
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expect(toKey(new Date(2026, 0, 5))).toBe('2026-01-05')
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})
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it('uses local time, not UTC', () => {
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// 23:30 local on the 15th must not roll forward to the 16th.
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expect(toKey(new Date(2026, 7, 15, 23, 30))).toBe('2026-08-15')
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})
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})
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describe('fromKey', () => {
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it('returns local midnight for the key', () => {
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const date = fromKey('2026-08-15')
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expect(date.getFullYear()).toBe(2026)
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expect(date.getMonth()).toBe(7)
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expect(date.getDate()).toBe(15)
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expect(date.getHours()).toBe(0)
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})
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it('round-trips with toKey', () => {
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expect(toKey(fromKey('2026-08-15'))).toBe('2026-08-15')
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})
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})
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describe('addDays', () => {
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it('advances across a month boundary', () => {
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expect(toKey(addDays(new Date(2026, 7, 31), 1))).toBe('2026-09-01')
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})
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it('advances across a year boundary', () => {
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expect(toKey(addDays(new Date(2026, 11, 31), 1))).toBe('2027-01-01')
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})
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it('does not mutate its argument', () => {
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const date = new Date(2026, 7, 15)
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addDays(date, 5)
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expect(toKey(date)).toBe('2026-08-15')
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})
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})
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describe('isKey', () => {
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it('accepts ISO date keys', () => {
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expect(isKey('2026-08-15')).toBe(true)
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})
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it('rejects legacy toDateString keys', () => {
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expect(isKey('Sat Aug 15 2026')).toBe(false)
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})
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it('rejects arbitrary strings', () => {
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expect(isKey('not-a-date')).toBe(false)
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})
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})
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describe('labelFor', () => {
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it('labels today', () => {
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expect(labelFor('2026-08-15', '2026-08-15')).toBe('Today')
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})
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it('labels tomorrow', () => {
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expect(labelFor('2026-08-16', '2026-08-15')).toBe('Tomorrow')
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})
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it('labels tomorrow across a month boundary', () => {
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expect(labelFor('2026-09-01', '2026-08-31')).toBe('Tomorrow')
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})
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it('labels tomorrow across a year boundary', () => {
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expect(labelFor('2027-01-01', '2026-12-31')).toBe('Tomorrow')
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})
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it('falls back to a short date for other days', () => {
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expect(labelFor('2026-08-20', '2026-08-15')).toBe('Aug 20')
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})
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})
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describe('formatLong', () => {
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it('renders the long-form date used in the header', () => {
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expect(formatLong('2026-08-15')).toBe('Saturday, August 15, 2026')
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})
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})
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