btrc-hub/frontend/src/components/PostList.test.tsx

import { fireEvent, screen } from '@testing-library/react'
import { describe, expect, it, vi } from 'vitest'

import PostList from '@/components/PostList'
import { buildPost } from '@/test/factories'
import { renderWithProviders } from '@/test/render'

describe ('PostList', () => {
  it ('renders post thumbnails as links to post details', () => {
    renderWithProviders (
        <PostList posts={[
          buildPost ({ id: 1, title: 'First', thumbnail: 'first.jpg' }),
          buildPost ({ id: 2, title: null, url: 'https://example.com/second' }),
        ]}/>,
    )

    expect (screen.getByRole ('link', { name: 'First' })).toHaveAttribute (
        'href',
        '/posts/1',
    )
    expect (
        screen.getByRole ('link', { name: 'https://example.com/second' }),
    ).toHaveAttribute ('href', '/posts/2')
  })

  it ('calls the optional click handler', () => {
    const onClick = vi.fn ()
    renderWithProviders (<PostList posts={[buildPost ()]} onClick={onClick}/>)

    fireEvent.click (screen.getByRole ('link', { name: 'テスト投稿' }))

    expect (onClick).toHaveBeenCalledTimes (1)
  })
})