import { describe, it, expect } from 'vitest'
import { formatPostDate } from '../src/utils/date.js'

describe('formatPostDate', () => {
  it('formats an ISO datetime as "Mon D, YYYY" in UTC', () => {
    expect(formatPostDate('2023-08-01T00:00:00+00:00')).toBe('Aug 1, 2023')
    expect(formatPostDate('2023-12-25T23:59:59Z')).toBe('Dec 25, 2023')
  })

  it('returns null for null/empty/invalid', () => {
    expect(formatPostDate(null)).toBe(null)
    expect(formatPostDate('')).toBe(null)
    expect(formatPostDate('not-a-date')).toBe(null)
  })
})