chore: add test case for download components (#29569)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

web/app/components/share/text-generation/run-batch/res-download/index.spec.tsx

@@ -0,0 +1,53 @@
+import React from 'react'
+import { render, screen } from '@testing-library/react'
+import ResDownload from './index'
+
+jest.mock('react-i18next', () => ({
+  useTranslation: () => ({
+    t: (key: string) => key,
+  }),
+}))
+
+const mockType = { Link: 'mock-link' }
+let capturedProps: Record<string, unknown> | undefined
+
+jest.mock('react-papaparse', () => ({
+  useCSVDownloader: () => {
+    const CSVDownloader = ({ children, ...props }: React.PropsWithChildren<Record<string, unknown>>) => {
+      capturedProps = props
+      return <div data-testid="csv-downloader" className={props.className as string}>{children}</div>
+    }
+    return {
+      CSVDownloader,
+      Type: mockType,
+    }
+  },
+}))
+
+describe('ResDownload', () => {
+  const values = [{ text: 'Hello' }]
+
+  beforeEach(() => {
+    jest.clearAllMocks()
+    capturedProps = undefined
+  })
+
+  it('should render desktop download button with CSV downloader props', () => {
+    render(<ResDownload isMobile={false} values={values} />)
+
+    expect(screen.getByTestId('csv-downloader')).toBeInTheDocument()
+    expect(screen.getByText('common.operation.download')).toBeInTheDocument()
+    expect(capturedProps?.data).toEqual(values)
+    expect(capturedProps?.filename).toBe('result')
+    expect(capturedProps?.bom).toBe(true)
+    expect(capturedProps?.type).toBe(mockType.Link)
+  })
+
+  it('should render mobile action button without desktop label', () => {
+    render(<ResDownload isMobile={true} values={values} />)
+
+    expect(screen.getByTestId('csv-downloader')).toBeInTheDocument()
+    expect(screen.queryByText('common.operation.download')).not.toBeInTheDocument()
+    expect(screen.getByRole('button')).toBeInTheDocument()
+  })
+})