cinny/src/app/utils/a11y.test.ts

import { test } from 'node:test';
import assert from 'node:assert/strict';
import dayjs from 'dayjs';
import { messageAriaLabel } from './a11y';

test('messageAriaLabel composes sender, date and time (24h)', () => {
  const ts = dayjs('2026-07-01T14:30:00').valueOf();
  assert.equal(
    messageAriaLabel('Alice', ts, { hour24Clock: true, dateFormatString: 'D MMM YYYY' }),
    'Alice, 1 Jul 2026 14:30',
  );
});

test('messageAriaLabel honours the 12-hour clock and date-format preferences', () => {
  const ts = dayjs('2026-07-01T14:30:00').valueOf();
  assert.equal(
    messageAriaLabel('Bob', ts, { hour24Clock: false, dateFormatString: 'MM/DD/YYYY' }),
    'Bob, 07/01/2026 02:30 PM',
  );
});

test('messageAriaLabel keeps the sender name verbatim as plain text', () => {
  const ts = dayjs('2026-07-01T09:05:00').valueOf();
  const label = messageAriaLabel('@user:example.org', ts, {
    hour24Clock: true,
    dateFormatString: '',
  });
  assert.ok(label.startsWith('@user:example.org, '));
  assert.ok(!label.includes('<'));
});