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/lib/postImportSourceValidation.test.ts

@@ -0,0 +1,52 @@
+import { describe, expect, it } from 'vitest'
+
+import {
+    countImportSourceLines,
+    validateImportSource,
+} from '@/lib/postImportSourceValidation'
+
+describe ('post import source validation', () => {
+  it ('counts trimmed non-empty CRLF and LF rows', () => {
+    expect (countImportSourceLines (' one \r\n\r\n two\n')).toBe (2)
+  })
+
+  it ('reports invalid protocols and malformed URLs with original line numbers', () => {
+    const issues = validateImportSource (
+        '\nftp://example.com/file\nhttps://exa mple.com/path')
+
+    expect (issues).toEqual ([
+      {
+	sourceRow: 2,
+	message: 'HTTP または HTTPS の URL ではありません．',
+	url: 'ftp://example.com/file' },
+      {
+	sourceRow: 3,
+	message: 'URL の形式が不正です．',
+	url: 'https://exa mple.com/path' }])
+  })
+
+  it ('detects duplicates after frontend URL normalisation', () => {
+    const issues = validateImportSource (
+        'https://EXAMPLE.com/path/\nhttps://example.com/path')
+
+    expect (issues).toEqual ([{
+      sourceRow: 2,
+      message: '1 行目と同じ URL です．',
+      url: 'https://example.com/path' }])
+  })
+
+  it ('rejects oversized URLs and rows beyond the maximum count', () => {
+    const oversized = `https://example.com/${ 'a'.repeat (20 * 1024) }`
+    const tooMany = Array.from (
+        { length: 101 },
+        (_, index) => `https://example.com/${ index }`).join ('\n')
+
+    expect (validateImportSource (oversized)[0]).toMatchObject ({
+      sourceRow: 1,
+      message: 'URL が長すぎます．' })
+    expect (validateImportSource (tooMany).at (-1)).toEqual ({
+      sourceRow: 101,
+      message: '取込件数は 100 件までです．',
+      url: 'https://example.com/100' })
+  })
+})