アイヌ語追加 (#428) (#433)

Reviewed-on: #433
Co-authored-by: miteruzo <miteruzo@naver.com>

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

@@ -36,7 +36,8 @@ describe ('PostImportSourcePage', () => {
       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').closest ('li'))
+	.toHaveTextContent ('2 行目: HTTP または HTTPS')
     expect (screen.getByText ('ftp://example.com/file')).toBeInTheDocument ()
     expect (input).toHaveAttribute ('aria-invalid', 'true')
     expect (router.navigate).not.toHaveBeenCalled ()
@@ -51,8 +52,8 @@ describe ('PostImportSourcePage', () => {
     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')
+	'/ja/posts/new?urls=https%3A%2F%2Fexample.com%2Fone%2Ba'
+	+ '+https%3A%2F%2Fexample.com%2Ftwo%3Fvalue%3Db%2Bc', undefined)
   })
 
   it ('disables Next when the encoded request target reaches 4096 bytes', () => {