import { describe, expect, it } from 'vitest'
import { validateXmlDocument, XML_PARSER_ERROR_NAMESPACES } from '../src/lib/xml'

function parserWithCandidates(candidates: Array<{ localName: string; namespaceURI: string | null; textContent: string | null }>) {
  return {
    parseFromString: () => ({
      getElementsByTagName: (localName: string) => {
        expect(localName).toBe('parsererror')
        return candidates
      },
    }),
  }
}

describe('XML validation', () => {
  it('accepts valid content even when the user root element is named parsererror', () => {
    expect(() => validateXmlDocument('<parsererror>valid</parsererror>', parserWithCandidates([
      { localName: 'parsererror', namespaceURI: null, textContent: 'valid' },
    ]))).not.toThrow()
  })

  it('reports parser errors from the browser parser-error namespace', () => {
    for (const namespaceURI of XML_PARSER_ERROR_NAMESPACES) {
      expect(() => validateXmlDocument('<root>', parserWithCandidates([
        { localName: 'parsererror', namespaceURI, textContent: 'XML parsing error\nDetails' },
      ]))).toThrow('XML parsing error')
    }
  })

  it('rejects empty input before invoking the parser', () => {
    expect(() => validateXmlDocument('  ', parserWithCandidates([]))).toThrow('请输入 XML')
  })
})