import { describe, expect, it } from 'vitest'
import { flattenPostPages } from './page'
import type { Post, PostPage } from './types'

const post = (id: string): Post => ({
  id,
  text: `post-${id}`,
  author: { username: `user-${id}`, name: `User ${id}` },
})

describe('flattenPostPages', () => {
  it('preserves API order and removes duplicate IDs', () => {
    const pages: PostPage[] = [
      { tweets: [post('1'), post('2')], nextCursor: 'next' },
      { tweets: [post('2'), post('3')] },
    ]

    expect(flattenPostPages(pages).map(({ id }) => id)).toEqual(['1', '2', '3'])
  })
})