フォームのバリデーションとニコ連携の画面変更 (#090) (#355)

Reviewed-on: #355
Co-authored-by: miteruzo <miteruzo@naver.com>
Co-committed-by: miteruzo <miteruzo@naver.com>

frontend/src/pages/posts/PostNewPage.test.tsx

@@ -1,13 +1,14 @@
 import { fireEvent, screen, waitFor } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
 
 import PostNewPage from '@/pages/posts/PostNewPage'
 import { buildUser } from '@/test/factories'
 import { renderWithProviders } from '@/test/render'
 
 const api = vi.hoisted (() => ({
-  apiGet:  vi.fn (),
-  apiPost: vi.fn (),
+  apiGet:     vi.fn (),
+  apiPost:    vi.fn (),
+  isApiError: vi.fn (),
 }))
 
 const toastApi = vi.hoisted (() => ({
@@ -18,6 +19,11 @@ vi.mock ('@/lib/api', () => api)
 vi.mock ('@/components/ui/use-toast', () => toastApi)
 
 describe ('PostNewPage', () => {
+  beforeEach (() => {
+    vi.clearAllMocks ()
+    api.isApiError.mockReturnValue (false)
+  })
+
   it ('blocks guests', () => {
     renderWithProviders (<PostNewPage user={buildUser ({ role: 'guest' })}/>)
 
@@ -55,4 +61,36 @@ describe ('PostNewPage', () => {
     expect (formData.get ('tags')).toBe ('tag1 tag2')
     expect (toastApi.toast).toHaveBeenCalledWith ({ title: '投稿成功!' })
   })
+
+  it ('shows 422 validation errors for post fields', async () => {
+    api.apiGet.mockResolvedValue ([])
+    api.isApiError.mockReturnValue (true)
+    api.apiPost.mockRejectedValueOnce ({
+      response: {
+        status: 422,
+        data:   {
+          type:        'validation_error',
+          message:     '入力内容を確認してください．',
+          errors:      { tags: ['ニコニコ・タグは直接指定できません．'] },
+          base_errors: ['投稿内容を確認してください．'],
+        },
+      },
+    })
+
+    renderWithProviders (<PostNewPage user={buildUser ({ role: 'member' })}/>)
+
+    const checkboxes = screen.getAllByRole ('checkbox', { name: '自動' })
+    fireEvent.click (checkboxes[0])
+    fireEvent.click (checkboxes[1])
+
+    const textboxes = screen.getAllByRole ('textbox')
+    fireEvent.change (textboxes[0], { target: { value: 'https://example.com/post' } })
+    fireEvent.change (textboxes[1], { target: { value: '投稿タイトル' } })
+    fireEvent.change (textboxes[3], { target: { value: 'nico:nico_tag' } })
+    fireEvent.click (screen.getByRole ('button', { name: '追加' }))
+
+    expect (await screen.findByText ('投稿内容を確認してください．')).toBeInTheDocument ()
+    expect (screen.getByText ('ニコニコ・タグは直接指定できません．')).toBeInTheDocument ()
+    expect (screen.getAllByRole ('textbox')[3]).toHaveAttribute ('aria-invalid', 'true')
+  })
 })