#419 フロントのテスト追加

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

@@ -0,0 +1,44 @@
+import { waitFor } from '@testing-library/react'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+import PostHistoryPage from '@/pages/posts/PostHistoryPage'
+import { renderWithProviders } from '@/test/render'
+
+const postsApi = vi.hoisted (() => ({
+  fetchPostChanges: vi.fn (),
+  updatePost:       vi.fn (),
+}))
+
+const tagsApi = vi.hoisted (() => ({
+  fetchTag: vi.fn (),
+}))
+
+vi.mock ('@/lib/posts', () => postsApi)
+vi.mock ('@/lib/tags', () => tagsApi)
+
+describe ('PostHistoryPage', () => {
+  beforeEach (() => {
+    vi.clearAllMocks ()
+    postsApi.fetchPostChanges.mockResolvedValue ({
+      versions: [],
+      count:    0,
+    })
+  })
+
+  it ('filters by external_tag without resolving the id as an internal tag', async () => {
+    renderWithProviders (
+        <PostHistoryPage/>,
+        { route: '/posts/changes?external_tag=7' },
+    )
+
+    await waitFor (() => {
+      expect (postsApi.fetchPostChanges).toHaveBeenCalledWith ({
+        externalTag: '7',
+        page:        1,
+        limit:       20,
+      })
+    })
+
+    expect (tagsApi.fetchTag).not.toHaveBeenCalled ()
+  })
+})