import { isWebFileLike } from '@/lib/web-file'

describe('isWebFileLike', () => {
  it('recognizes a multipart file without relying on a global File constructor', () => {
    const originalFile = globalThis.File
    Object.defineProperty(globalThis, 'File', { configurable: true, value: undefined })

    try {
      const multipartFile = {
        name: 'knowledge.pdf',
        size: 1024,
        arrayBuffer: async () => new ArrayBuffer(0),
      } as unknown as FormDataEntryValue

      expect(isWebFileLike(multipartFile)).toBe(true)
    } finally {
      Object.defineProperty(globalThis, 'File', { configurable: true, value: originalFile })
    }
  })

  it.each([
    null,
    'knowledge.pdf',
    { name: 'knowledge.pdf', size: 1024 },
    { name: 'knowledge.pdf', arrayBuffer: async () => new ArrayBuffer(0) },
    { size: 1024, arrayBuffer: async () => new ArrayBuffer(0) },
  ])('rejects non-file multipart values', (value) => {
    expect(isWebFileLike(value as FormDataEntryValue | null)).toBe(false)
  })
})