chore: tests for webapp run batch (#29767)

web/app/components/share/text-generation/run-batch/csv-reader/index.spec.tsx

@@ -0,0 +1,70 @@
+import React from 'react'
+import { act, render, screen, waitFor } from '@testing-library/react'
+import CSVReader from './index'
+
+let mockAcceptedFile: { name: string } | null = null
+let capturedHandlers: Record<string, (payload: any) => void> = {}
+
+jest.mock('react-papaparse', () => ({
+  useCSVReader: () => ({
+    CSVReader: ({ children, ...handlers }: any) => {
+      capturedHandlers = handlers
+      return (
+        <div data-testid="csv-reader-wrapper">
+          {children({
+            getRootProps: () => ({ 'data-testid': 'drop-zone' }),
+            acceptedFile: mockAcceptedFile,
+          })}
+        </div>
+      )
+    },
+  }),
+}))
+
+describe('CSVReader', () => {
+  beforeEach(() => {
+    mockAcceptedFile = null
+    capturedHandlers = {}
+    jest.clearAllMocks()
+  })
+
+  test('should display upload instructions when no file selected', async () => {
+    const onParsed = jest.fn()
+    render(<CSVReader onParsed={onParsed} />)
+
+    expect(screen.getByText('share.generation.csvUploadTitle')).toBeInTheDocument()
+    expect(screen.getByText('share.generation.browse')).toBeInTheDocument()
+
+    await act(async () => {
+      capturedHandlers.onUploadAccepted?.({ data: [['row1']] })
+    })
+    expect(onParsed).toHaveBeenCalledWith([['row1']])
+  })
+
+  test('should show accepted file name without extension', () => {
+    mockAcceptedFile = { name: 'batch.csv' }
+    render(<CSVReader onParsed={jest.fn()} />)
+
+    expect(screen.getByText('batch')).toBeInTheDocument()
+    expect(screen.getByText('.csv')).toBeInTheDocument()
+  })
+
+  test('should toggle hover styling on drag events', async () => {
+    render(<CSVReader onParsed={jest.fn()} />)
+    const dragEvent = { preventDefault: jest.fn() } as unknown as DragEvent
+
+    await act(async () => {
+      capturedHandlers.onDragOver?.(dragEvent)
+    })
+    await waitFor(() => {
+      expect(screen.getByTestId('drop-zone')).toHaveClass('border-components-dropzone-border-accent')
+    })
+
+    await act(async () => {
+      capturedHandlers.onDragLeave?.(dragEvent)
+    })
+    await waitFor(() => {
+      expect(screen.getByTestId('drop-zone')).not.toHaveClass('border-components-dropzone-border-accent')
+    })
+  })
+})