#434

frontend/src/lib/posts.test.ts

@@ -1,6 +1,7 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 
-import { fetchPostChanges, fetchPosts, toggleViewedFlg, updatePost } from '@/lib/posts'
+import { fetchPostChanges, fetchPosts, switchPostFilterLocale, toggleViewedFlg, updatePost }
+    from '@/lib/posts'
 
 import type { FetchPostsParams } from '@/types'
 
@@ -34,6 +35,21 @@ describe ('posts API functions', () => {
     vi.clearAllMocks ()
   })
 
+  it ('switches current tag names without adding identity state to the URL', async () => {
+    api.apiGet.mockResolvedValueOnce ({ tags: 'シロシ not:nico:shared' })
+    const path = await switchPostFilterLocale ({
+	location: { pathname: '/ja/counts/posts',
+	    search: '?tags=source+not%3Anico%3Ashared&match=any', hash: '#table' },
+	params: {}, locale: 'ja', targetLocale: 'ain-Kana' })
+    expect (api.apiGet).toHaveBeenCalledWith ('/posts/tag_filters', {
+	locale: 'ja', params: { tags: 'source not:nico:shared', target_locale: 'ain-Kana' } })
+    const url = new URL (path, 'https://example.test')
+    expect (url.pathname).toBe ('/ain-Kana/counts/posts')
+    expect (Object.fromEntries (url.searchParams)).toEqual ({
+	tags: 'シロシ not:nico:shared', match: 'any' })
+    expect (url.hash).toBe ('#table')
+  })
+
   it ('maps post search parameters to backend snake_case names', async () => {
     api.apiGet.mockResolvedValueOnce ({ posts: [], count: 0 })