広場投稿追加画面の刷新 (#399) (#413)

Reviewed-on: http://git.miteruzo.com/miteruzo/btrc-hub/pulls/413
Co-authored-by: miteruzo <miteruzo@naver.com>
Co-committed-by: miteruzo <miteruzo@naver.com>

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

@@ -0,0 +1,67 @@
+import { fireEvent, screen } from '@testing-library/react'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import PostImportSourcePage from '@/pages/posts/PostImportSourcePage'
+import { buildUser } from '@/test/factories'
+import { renderWithProviders } from '@/test/render'
+
+const router = vi.hoisted (() => ({ navigate: vi.fn () }))
+
+vi.mock ('react-router-dom', async importOriginal => ({
+  ...await importOriginal<typeof import('react-router-dom')> (),
+  useNavigate: () => router.navigate }))
+
+describe ('PostImportSourcePage', () => {
+  beforeEach (() => {
+    sessionStorage.clear ()
+    vi.clearAllMocks ()
+  })
+
+  it ('validates an empty source only after Next is pressed', () => {
+    renderWithProviders (<PostImportSourcePage user={buildUser ()}/>)
+
+    expect (screen.queryByText ('URL を入力してください．')).not.toBeInTheDocument ()
+
+    fireEvent.click (screen.getByRole ('button', { name: '次へ' }))
+
+    expect (screen.getByText ('URL を入力してください．')).toBeInTheDocument ()
+    expect (router.navigate).not.toHaveBeenCalled ()
+  })
+
+  it ('reports frontend URL issues with original line numbers', () => {
+    renderWithProviders (<PostImportSourcePage user={buildUser ()}/>)
+    const input = screen.getByRole ('textbox', { name: '' })
+
+    fireEvent.change (input, {
+      target: { value: '\nftp://example.com/file\nhttps://example.com/valid' } })
+    fireEvent.click (screen.getByRole ('button', { name: '次へ' }))
+
+    expect (screen.getByText (/2 行目: HTTP または HTTPS/)).toBeInTheDocument ()
+    expect (screen.getByText ('ftp://example.com/file')).toBeInTheDocument ()
+    expect (input).toHaveAttribute ('aria-invalid', 'true')
+    expect (router.navigate).not.toHaveBeenCalled ()
+  })
+
+  it ('navigates with individually encoded URLs without calling an API', () => {
+    renderWithProviders (<PostImportSourcePage user={buildUser ()}/>)
+
+    fireEvent.change (screen.getByRole ('textbox', { name: '' }), {
+      target: {
+	value: 'https://example.com/one+a\nhttps://example.com/two?value=b+c' } })
+    fireEvent.click (screen.getByRole ('button', { name: '次へ' }))
+
+    expect (router.navigate).toHaveBeenCalledWith (
+	'/posts/new?urls=https%3A%2F%2Fexample.com%2Fone%2Ba'
+	+ '+https%3A%2F%2Fexample.com%2Ftwo%3Fvalue%3Db%2Bc')
+  })
+
+  it ('disables Next when the encoded request target reaches 4096 bytes', () => {
+    renderWithProviders (<PostImportSourcePage user={buildUser ()}/>)
+    const input = screen.getByRole ('textbox', { name: '' })
+
+    fireEvent.change (input, {
+      target: { value: `https://example.com/${ 'a'.repeat (6_200) }` } })
+
+    expect (screen.getByRole ('button', { name: '次へ' })).toBeDisabled ()
+  })
+})