format.test.ts

import type { Formatter } from '@nanostores/i18n'
import { equal, match } from 'node:assert/strict'
import { describe, test } from 'node:test'

import { formatPublishedAt } from '../format.ts'

describe('format', () => {
  function createMockFormatter(): Formatter {
    return {
      number: () => '',
      relativeTime: (num, unit) => `${num} ${unit}`,
      time: date => {
        let d = date instanceof Date ? date : new Date(date ?? 0)
        return d.toISOString()
      }
    }
  }

  test('formats time as minutes ago when less than hour', () => {
    let format = createMockFormatter()
    let thirtyMinutesAgo = Math.floor((Date.now() - 30 * 60 * 1000) / 1000)

    let result = formatPublishedAt(format, thirtyMinutesAgo)

    equal(result, '-30 minute')
  })

  test('formats time as hours ago when less than day', () => {
    let format = createMockFormatter()
    let threeHoursAgo = Math.floor((Date.now() - 3 * 60 * 60 * 1000) / 1000)

    let result = formatPublishedAt(format, threeHoursAgo)

    equal(result, '-3 hour')
  })

  test('formats time as full date when more than day', () => {
    let format = createMockFormatter()
    let twoDaysAgo = Math.floor((Date.now() - 2 * 24 * 60 * 60 * 1000) / 1000)

    let result = formatPublishedAt(format, twoDaysAgo)

    match(result, /^\d{4}-\d{2}-\d{2}T/)
  })
})