広場投稿追加画面の刷新 (#399) (#413)

Reviewed-on: #413
Co-authored-by: miteruzo <miteruzo@naver.com>
Co-committed-by: miteruzo <miteruzo@naver.com>

frontend/src/lib/postNewQueryState.test.ts

@@ -0,0 +1,43 @@
+import { describe, expect, it } from 'vitest'
+
+import {
+    buildPostNewReviewPath,
+    hasPostNewReviewState,
+    isPostNewReviewPathWithinLimit,
+    parsePostNewReviewUrls,
+    postNewReviewPathByteLength,
+} from '@/lib/postNewQueryState'
+
+describe ('post new review URL state', () => {
+  it ('encodes each URL separately and preserves literal plus signs', () => {
+    const urls = [
+	'https://example.com/one+a',
+	'https://example.com/two?value=b+c']
+
+    const path = buildPostNewReviewPath (urls)
+
+    expect (path).toBe (
+	'/posts/new?urls=https%3A%2F%2Fexample.com%2Fone%2Ba'
+	+ '+https%3A%2F%2Fexample.com%2Ftwo%3Fvalue%3Db%2Bc')
+    expect (parsePostNewReviewUrls (path.slice ('/posts/new'.length))).toEqual (urls)
+  })
+
+  it ('uses only the raw urls parameter as review state', () => {
+    expect (hasPostNewReviewState ('?session_id=old&meta=old')).toBe (false)
+    expect (hasPostNewReviewState ('?unknown=value&urls=')).toBe (true)
+    expect (parsePostNewReviewUrls ('?unknown=value&urls=one+two&meta=old'))
+	.toEqual (['one', 'two'])
+  })
+
+  it ('allows at most a 6 143 byte request target', () => {
+    const baseUrl = 'https://example.com/'
+    const baseLength = postNewReviewPathByteLength ([baseUrl])
+    const allowed = `${ baseUrl }${ 'a'.repeat (6_143 - baseLength) }`
+    const denied = `${ allowed }a`
+
+    expect (postNewReviewPathByteLength ([allowed])).toBe (6_143)
+    expect (isPostNewReviewPathWithinLimit ([allowed])).toBe (true)
+    expect (postNewReviewPathByteLength ([denied])).toBe (6_144)
+    expect (isPostNewReviewPathWithinLimit ([denied])).toBe (false)
+  })
+})