#399

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

@@ -134,4 +134,29 @@ describe ('PostNewPage', () => {
     expect (formData.get ('original_created_from')).toBe (
         toMinutePrecisionIsoUtc ('2024-01-01T12:34'))
   })
+
+  it ('shows deduplicated original-created endpoint errors on the shared datetime field', async () => {
+    api.apiGet.mockResolvedValue ([])
+    api.isApiError.mockReturnValue (true)
+    api.apiPost.mockRejectedValueOnce ({
+      response: {
+        status: 422,
+        data:   {
+          type: 'validation_error',
+          errors: {
+            original_created_at: ['日時を確認してください．'],
+            original_created_from: ['日時を確認してください．'],
+            original_created_before: ['終了を確認してください．'] },
+        },
+      },
+    })
+
+    renderWithProviders (<PostNewPage user={buildUser ({ role: 'member' })}/>)
+
+    fireEvent.click (screen.getByRole ('button', { name: '追加' }))
+
+    expect (await screen.findByText ('日時を確認してください．')).toBeInTheDocument ()
+    expect (screen.getByText ('終了を確認してください．')).toBeInTheDocument ()
+    expect (screen.getAllByText ('日時を確認してください．')).toHaveLength (1)
+  })
 })