import * as zlib from 'zlib';
import { PDFParse } from 'pdf-parse';
import { computeContentFingerprint } from './pdf-fingerprint.util';

jest.mock('pdf-parse', () => ({ PDFParse: jest.fn() }));

describe('computeContentFingerprint – ungeprüfte Inhalte', () => {
  it('übergibt eine Deflate-Bombe nicht an pdf.js', async () => {
    const bombe = zlib.deflateSync(Buffer.alloc(300 * 1024 * 1024));
    const pdf = Buffer.concat([
      Buffer.from(
        `%PDF-1.7\n1 0 obj\n<< /Length ${bombe.length} /Filter /FlateDecode >>\nstream\n`,
        'latin1',
      ),
      bombe,
      Buffer.from('\nendstream\nendobj\n%%EOF\n', 'latin1'),
    ]);

    await expect(computeContentFingerprint(pdf)).resolves.toBe('');
    expect(PDFParse).not.toHaveBeenCalled();
  });

  it('übergibt verschlüsselte PDFs nicht an pdf.js', async () => {
    const pdf = Buffer.from(
      '%PDF-1.7\ntrailer\n<< /Encrypt 5 0 R >>\n%%EOF\n',
      'latin1',
    );
    await expect(computeContentFingerprint(pdf)).resolves.toBe('');
    expect(PDFParse).not.toHaveBeenCalled();
  });
});