test: add comprehensive tests (#31649)

Co-authored-by: CodingOnStar <hanxujiang@dify.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

web/app/components/datasets/api/index.spec.tsx

@@ -0,0 +1,24 @@
+import { cleanup, render, screen } from '@testing-library/react'
+import { afterEach, describe, expect, it } from 'vitest'
+import ApiIndex from './index'
+
+afterEach(() => {
+  cleanup()
+})
+
+describe('ApiIndex', () => {
+  it('should render without crashing', () => {
+    render(<ApiIndex />)
+    expect(screen.getByText('index')).toBeInTheDocument()
+  })
+
+  it('should render a div with text "index"', () => {
+    const { container } = render(<ApiIndex />)
+    expect(container.firstChild).toBeInstanceOf(HTMLDivElement)
+    expect(container.textContent).toBe('index')
+  })
+
+  it('should be a valid function component', () => {
+    expect(typeof ApiIndex).toBe('function')
+  })
+})